Publications

2018

M. Verplaetse, L. Breyne, Christian Neumeyr, Timothy De Keulenaer, Wouter Soenen, X. Yin, P. Ossieur, G. Torfs, and J. Bauwelinck: "DSP-free and real-time transmission of 50Gb/s NRZ over 15km SSMF and 64Gb/s NRZ B2B with a 1.3 µm VCSEL", OFC 2018
A. Malacarne, C. Neumeyr, W. Soenen, F. Falconi, C. Porzi, T. Aalto, J. Rosskopf, J. Bauwelinck and A. Bogoni: "Optical transmitter based on a 1.3 µm VCSEL and a SiGe driver circuit for short-reach applications and beyond", IEEE Journal of Lightwave Technology

2017

Wouter SoenenUGent, Bart MoeneclaeyUGent, Xin YinUGent, Silvia Spiga, Markus-Christian Amann, Christian Neumeyr, Markus Ortsiefer, Elad Mentovich, Dimitris Apostolopoulos, Paraskevas Bakopoulos, et al.: “A 40-Gb/s 1.5-µm VCSEL Link with a Low-Power SiGe VCSEL Driver and TIA Operated at 2.5 V”, OFC 2017
A. Malacarne, F. Falconi, C. Neumeyr, Wouter SoenenUGent, C. Porzi, T. Aalto, J. Rosskopf, M. Chiesa, Johan BauwelinckUGent and A. Bogoni: “Low Power 1.3µm VCSEL Transmitter for data center Interconnect and Beyond”, ECOC 2017
T. Aalto, M. Harjanne, T. Vehmas, M. Karppinen, A. Sitomaniemi, A. Malacarne, C. Neumeyr and Johan Bauwelinck: “Transceivers for 400G based on hybrid integrated thick SOI and III/V chips”, ECOC 2017
N. Eiselt, H. Griesser, J. Wei, R. Hohenleitner, A. Dochhan, M. Ortsiefer, M. Eiselt, C. Neumeyr, J. J. Vegas Olmos, I. Tafur Monroy: “Experimental Demonstration of 84 Gb/s PAM-4 over up to 1.6 km SSMF Using an 20-GHz VCSEL at 1525 nm”, IEEE Jourbal of Lightwave technology (Feb 2017)

2016

A. Malacarne, V. Sorianello, A. Daly, B. Koegel, M. Ortsiefer, C. Neumeyr, M. Romagnoli, A. Bogoni: “Performance Analysis of 40-Gb/s Transmission Based on Directly Modulated High-Speed 1530-nm VCSEL”, IEEE Photonics technology Letters (Aug 2016)
T. Alto, M. Harjanne, B.-J. Offrein, C. Caër, C. Neumeyr, A. Malacarne, M. Guina, RF. N. Sheehan, F. H. Peters, P. Melanen: “Integrating III-V, Si, and polymer waveguides for optical interconnects: RAPIDO”, SPIE OPTO (May 2016)
Q. Zhang, N. Stojanovic, C. Prodaniuc, C. Xie, M. Ortsiefer, A. Daly, R. Hohenleitner, C. Neumeyr, E. Zhou, G. N. Lie, X. Xu: “56-Gbps optical interconnection over 1 Km SSMF with 10G 1550nm VCSEL enabled by flexible PAM4 MLSE”, IEEE 6th Int. Conf. on Photonics ICP

2015

E. Prior, C. de Dios, M. Ortsiefer, P. Meissner, and Pablo Acedo: “Understanding VCSEL-based Gain Switching optical frequency combs: experimental study of polarization dynamics”, IEEE Journal of Lightwave Technology
F. Karinou, C. Prodaniuc, N. Stojanovic, M. Ortsiefer, A. Daly, R. Hohenleitner, B. Kögel, and C. Neumeyr: „Experimental Performance Evaluation of Equalization Techniques for 56 Gb/s PAM-4 VCSEL-based Optical Interconnects”, 41^st European Conference on Optical Communication (ECOC), Valencia, 2015
F. Karinou, C. Prodaniuc, N. Stojanovic, M. Ortsiefer, A. Daly, R. Hohenleitner, B. Kögel, and C. Neumeyr: „Directly PAM-4 Modulated 1530-nm VCSEL Enabling 56 Gb/s/λ Data-Center Interconnects”, IEEE Photonics Technology Letters
F. Karinou, N. Stojanovic, G. Goeger, C. Xie, M. Ortsiefer, A. Daly, R. Hohenleitner, B. Kögel, and C. Neumeyr: „28 Gb/s NRZ-OOK Using 1530-nm VCSEL, Direct Detection and MLSE Receiver for Optical Interconnects”, IEEE Optical Interconnects Conference, San Diego, 2015
T. Aalto, M. Harjanne, S. Ylinen, M. Kapulainen, T. Vehmas, M. Cherchi, C. Neumeyr, M. Ortsiefer, and A. Malacarne: „Multi-wavelength transceiver integration on SOI for high-performance computing system applications”,Photonics West, San Francisco, 2015
S. Paul, C. Gierl, J. Cesar, Q. T. Le, M. Malekizandi, B. Kögel, C. Neumeyr, M. Ortsiefer, and F. Küppers: „10 Gbit/s Direct Modulation of Widely Tunable 1550 nm MEMS VCSEL“, IEEE J. Sel. Topics in Quantum Electron., , 2015
S. Paul, C. Gierl, J. Cesar, F. Küppers, B. Kögel, J. Rosskopf, M. Görblich, Y. Xu, C. Neumeyr, and M. Ortsiefer: „7-GHz Small-signal Modulation Response of a Surface Micromachined BCB MEMS VCSEL with > 50-nm Continuous Tuning”, CLEO Munich, 2015
S. Paul, C. Gierl, J. Cesar, Q. T. Le, M. Malekizandi, F. Küppers, B. Kögel, J. Rosskopf, C. Gréus, M. Görblich, Y. Xu, C. Neumeyr, and M. Ortsiefer: „High Speed Surface Micromachined MEMS Tunable VCSEL for Telecom Wavelengths“, CLEO 2015
A. Malacarne, V, Sorianello, A. Daly, B. Kögel, M. Ortsiefer, S. Melo, C. Neumeyr, M. Romagnoli, and A. Bogoni: “High-Speed Long-Wavelength VCSELs for Energy-Efficient 40 Gbps Links up to 1 km Without Error Correction”, Optical Fiber Communication Conference and Exposition (OFC), Tu2H.1, Los Angeles, 2015

2014

M. Ortsiefer: “Kleine Laser für Kommunikation und Sensorik - von universitärer Forschung zur Unternehmensgründung und industriellen Anwendung“, Buchbeitrag in „Wie kommt das Neue in Technik und Medizin“, ISBN 978-3-00-047469-9, 2014
M. Ortsiefer, J. Rosskopf, B. Kögel, A. Daly, M. Görblich, Y. Xu, C. Gréus, and C. Neumeyr: „Long Wavelength VCSELs with Enhanced Temperature and Modulation Characteristics”, IEEE 24^th International Semiconductor Laser Conference, TA6, Mallorca, 2014
E. Prior Cano, C. de Dios Fernandez, A. R. Criado Serrano, M. Ortsiefer, P. Meissner, and P. Acedo: "Experimental study of VCSEL-based Optical Frequency Comb Generators," ”, IEEE Photonics Technology Letters, 26, 2118-2121,2014
E. Bosman, A. G. Elmogi, S. Wiegersma, H. Berg, M. Ortsiefer, A. Daly, G. Steenberge: “Adaptive coupling approach for single mode VCSELs with polymer waveguides”, IEEE Photonics Conference (IPC), 10.1109/IPCon.2014.6995201, San Diego, 2014
M. Ortsiefer: „Achievements and prospects for long-wavelength VCSELs in optical sensing applications“, Field Laser Applications in Industry and Research (FLAIR), Florence, 2014
M. Ortsiefer, B. Kögel, J. Rosskopf, M. Görblich, Y. Xu, C. Gréus, and C. Neumeyr: “Long Wavelength High Speed VCSELs for Long Haul and Data Centers”, Optical Fiber Conference (OFC), W4C.2, (invited talk), San Francisco, 2014
C. Xie, S. Spiga, P. Dong, P. Winzer, A. Gnauck, C. Gréus, M. Ortsiefer, C. Neumeyr, M. Müller, and M.C. Amann: „Generation and Transmission of 100-Gb/s PDM 4-PAM Using Directly Modulated VCSELs and Coherent Detection”,Optical Fiber Communication Conference and Exposition (OFC), Th3K.2, San Francisco, 2014

2013

A.R. Criado, C. Fernandez, E. Prior, M. Ortsiefer, M., P. Meissner, P. Acedo: “VCSEL based Optical Frequency Combs: towards efficient single-device comb generation”, IEEE Photonics Technology Letters, 25, 1981-1984, 2013
E. Prior, A. R. Criado, C. de Dios, P. Acedo, M. Ortsiefer, and P. Meissner: „Continuous wave sub-THz photonic generation with a VCSEL-based Optical Frequency Comb”, Electron. Lett., 49, 944-945, 2013
C. Xie, P. Dong, P. Winzer, C. Gréus, M. Ortsiefer, C. Neumeyr, S. Spiga, M. Müller, and M.-C. Amann: „960-km SSMF transmission of 105.7-Gb/s PDM 3-PAM using directly modulated VCSELs and coherent detection”, Optics Express, 21, 11585-11589, 2013
A. R. Criado, C. de Dios, E. Prior, P. Acedo, M. Ortsiefer, and P. Meissner: “Photonic generation of CW sub-THz and THz waves using an efficient Gain-Switching based VCSEL optical frequency comb”,38^th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Mainz, 2013
R. Rodes, M. Müller, B. Li, J. Estarán, J. B. Jensen, T. Gründl, M. Ortsiefer, C. Neumeyr, J. Rosskopf, K. J. Larsen, M.-C. Amann, and I. T. Monroy: „High-Speed 1550 nm Vcsel Data Transmission Link Employing 25 GBd 4-PAM Modulation and Hard Decision Forward Error Correction”, Journal of Lightwave Technology, 31, 689-695, 2013
T. Gründl, P. Debernardi, M. Müller, C. Grasse, P. Ebert, K. Geiger, M. Ortsiefer, G. Böhm, R. Meyer, and M.-C. Amann: „Record Single-Mode, High-Power VCSELs by Inhibition of Spatial Hole Burning”, IEEE J. Sel. Topics in Quantum Electron., 19, 1700913, 2013
M. Ortsiefer, W. Hofmann, J. Rosskopf, and M.-C. Amann: “Long-Wavelength VCSELs with Buried Tunnel Junction”, Chapter 10 in VCSELs - Fundamentals, Technology and Applications of Vertical-Cavity Surface-Emitting Lasers, Springer Series in Optical Sciences, Vol. 166, ISBN 978-3-642-24985-3

2012

M. Müller, P. Wolf, C. Grasse, M. P. I. Dias, M. Ortsiefer, G. Böhm, E. Wong, W. Hofmann, D. Bimberg and M.C. Amann: „1.3 μm Short-Cavity VCSELs Enabling Error-Free Transmission at 25 Gbps over a 25 km Fiber Link”, Electron. Lett., 48, 1487-1489, 2012
J. Estarán, R. Rodes, T. T. Pham, M. Ortsiefer, C. Neumeyr, J. Rosskopf, and I. Tafur Monroy: “Quad 14Gbps L-Band VCSEL-based System for WDM Migration of 4-lanes 56 Gbps Optical Data Links”, 38^th European Conference on Optical Communication (ECOC), Th.2.B.3, Amsterdam, 2012
C. Grasse, M. Müller, T. Gründl, G. Böhm, E. Rönneberg, P. Wiecha, M. Ortsiefer, R. Meyer, and M.-C. Amann: „AlGaInAsPSb-based High-Speed Short-Cavity VCSEL with single-mode Emission at 1.3 μm grown by MOVPE on InP substrate“, 16^th International Conference on Metal Organic Vapor Phase Epitaxy, WeP-60,Busan, 2012
R. Rodes, J. Estaran, B. Li, M.Müller, J. Jensen, T. Gründl, M. Ortsiefer, C. Neumeyr, J. Rosskopf, K. Larsen, M.-C. Amann, and I. T. Monroy: “100 Gb/s single VCSEL data transmission link”, Optical Fiber Conference (OFC), PDP5D.10, Los Angeles, 2012
S. S. Cercós, K. Prince, F. Roubeau, S. Lim, C. Neumeyr, M. Ortsiefer, E. Rönneberg, C. Aupetit-Berthelemot, and I. T.: Monroy: „Free-running L-band VCSEL for 1.25 Gbps hybrid radio-fiber cloud optical interconnects“, Optical Fiber Conference (OFC), Los Angeles, 2012
M. Müller, C. Grasse, K. Saller, T. Gründl, G. Böhm, M. Ortsiefer, and M.-C. Amann: „1.3 μm High-Power Short-Cavity VCSELs for High-Speed Applications“, Conference on Lasers and Electro Optics (CLEO), CW3N.2, San Jose, CW3N.2, 2012
M. Ortsiefer, C. Neumeyr, J. Rosskopf, T. Gründl, G. Böhm, A. Hangauer, R. Strzoda, C. Gierl, J. Chen, and M.-C. Amann: “Long-wavelength VCSELs for sensing applications”, Proc. of SPIE & Photonics West, San Francisco, Paper 8276-9 (invited talk) , 2012

2011

R. Rodes, J. B. Jensen, D. Zibar, C. Neumeyr, E. Rönneberg, J. Rosskopf, M. Ortsiefer, and I. T. Monroy: “Vertical-cavity surface-emitting laser based digital coherent detection for multigigabit long reach passive optical links”, Microwave and Optical Technology Letters, 53, 2462-2464, 2011
M. Ortsiefer, J. Rosskopf, C. Neumeyr: „VERTILAS - Achievements and frontiers for VCSELs in TDLS applications“, Field Laser Applications in Industry and Research (FLAIR), Murnau, 2011

K. Prince, M. Ma, T. B. Gibbon, C. Neumeyr, E. Rönneberg, M. Ortsiefer, and I. T. Monroy: “Free-Running 1550 nm VCSEL for 10.7 Gb/s Transmission in 99.7 km PON”, Journal of Optical Communications and Networking, 3, 399-403, 2011
M. Ortsiefer, „Challenges, solutions and prospects of long-wavelength VCSELs”, Compound Semiconductor Week – 38^th International Symposium on Compound Semiconductors (ISCS), 23^rd International Conference on Indium Phosphide and Related Materials (IPRM), Berlin, (invited short course), 2011
T. Gründl, R. D. Nagel, P. Debernardi, K. Geiger, C. Grasse, M. Ortsiefer, J. Rosskopf , G. Böhm, R. Meyer, and M.-C. Amann, „Novel concept for a Monolithically Integrated MEMS VCSEL”, Indium Phosphide and Related Materials (IPRM), Conference Digest, WE-7.2.2, Berlin, 2011
M. Beltrán, J. B. Jensen, X. Yu, R. Llorente, R. Rodes, M. Ortsiefer, C. Neumeyr, and I. T. Monroy: “Performance of a 60-GHz DCM-OFDM and BPSK-Impulse Ultra-Wideband System with Radio-over-Fiber and Wireless Transmission Employing a Directly-Modulated VCSEL”, IEEE Journal on Selected Areas in Communications: Special Issue on Distributed Broadband Wireless Communications, 29, 1295-1303, 2011
G. Böhm, A. Bachmann, J. Rosskopf, M. Ortsiefer, J. Chen, A. Hangauer, R. Meyer, R. Strzoda, and M.-C. Amann: “Comparison of InP-and GaSb-based VCSELs emitting at 2.3 µm suitable for carbon monoxide detection”, Journal of Crystal Growth, 323, 442-445, 2011
M. Ortsiefer, C. Neumeyr, J. Rosskopf, S. Arafin, G. Böhm, A. Hangauer, J. Chen, R. Strzoda, and M.-C. Amann: “GaSb and InP-based VCSELs at 2.3 µm emission wavelength for tuneable diode laser spectroscopy of carbon monoxide”, Proc. of SPIE Photonics West, San Francisco, Paper 7945-9 (invited talk) , 2011
P. Meissner, K. Zogal, C. Gierl, S. Jatta, H. Davani, T. Gründl, C. Grasse, M.-C. Amann, A. Daly, B. Corbett, B. Kögel, Å. Haglund, J. Gustavsson, P. Westbergh, A. Larsson, P. Debernardi, and M. Ortsiefer: “Tuneable VCSELs aiming for the application in interconnects and short haul systems”, Proc. of SPIE & Photonics West, San Francisco, Paper 7959-7 , 2011

2010

R. Rodes, J. B. Jensen, D. Zibar, C. Neumeyr, E. Roenneberg, J. Rosskopf, M. Ortsiefer, and I. T. Monroy: ”All-VCSEL based digital coherent detection link for multi Gbit/s WDM passive optical networks”, Optics Express, 18, 24969-24974, 2010
T. Gründl, K. Zogal, M. Müller, R. Nagel, S. Jatta, K. Geiger, C. Grasse, G. Böhm, M. Ortsiefer, P. Meissner, and M.C. Amann, ”High-speed high-power VCSELs based on InP suitable for telecommunication and gas sensing”, SPIE Remote Sensing, Security and Defense, paper: 7828-6, Toulouse, 2010
G. Böhm, A. Bachmann, J. Rosskopf, M. Ortsiefer, J. Chen, A. Hangauer, R. Meyer, R. Strzoda, and M.-C. Amann: “Comparison of InP- and GaSb-based VCSELs emitting at 2.3 μm suitable for Carbon Monoxide detection”, 16^th International Conference on Molecular Beam Epitaxy, Tue B1.1, Berlin, 2010
M. Müller, W. Hofmann, A. Nadtochiy, A. Mutig, G. Böhm, M. Ortsiefer, D. Bimberg and M.-C. Amann: „1.55 µm High-Speed VCSELs Enabling Error-Free Fiber Transmission up to 25 Gbit/s”, IEEE 22^nd International Semiconductor Laser Conference, WC3, Kyoto, 2010
T. B. Gibbon, K. Prince, C. Neumeyr, E. Rönneberg, M. Ortsiefer, and I. T. Monroy: „10 Gb/s 1550 nm VCSEL transmission over 23.6 km SMF with no Dispersion Compensation and no Injection Locking for WDM PONs“, Optical Fiber Conference(OFC), JThA30,San Diego, 2010
A. J. Daly, B. J. Roycroft, F. H. Peters, M. Ortsiefer, and B. Corbett: „Dynamics of 1.55 µm buried tunnel junction VCSELs under optical injection around threshold“, Proc. of SPIE Photonics West, San Francisco, Vol. 7615, 7615-25, 2010
M. Ortsiefer, M. Görblich, Y. Xu, E. Rönneberg, J. Rosskopf, R. Shau, and M.-C. Amann: „Polarization Control in Buried Tunnel Junction VCSELs Using a Birefringent Semiconductor/Dielectric Subwavelength Grating “, IEEE Photonics Technology Letters, 22, 15-17, 2010

2009

P. Meissner, B. Kögel, K. Zogal, S. Jotta, C. Gierl, C. Grasse, T. Gründl, M.-C. Amann, P. Westbergh, A. Larsson, and M. Ortsiefer: „Widely Tuneable Micromachined VCSELs“, 10^th Chitose International Forum on Photonics Science & Technology, Chitose, 2009
C. Grasse, M. Müller, G. Böhm, R. Enzmann, Y. Xu, M. Görblich, R. Meyer, M. Ortsiefer, and M.-C. Amann, ”Planarization of overgrown tunnel junctions for InP-based VCSEL by MOVPE”, European Workshop on Metalorganic Vapor Phase Epitaxy, paper:EWMOVPE XIII , Ulm, 2009
M. Ortsiefer, J. Rosskopf, R. Shau, Y. Xu, M. Görblich, C. Neumeyr, C. Gréus, and E. Rönneberg: „Long-wavelength VCSELs for TDLS applications“, Field Laser Applications in Industry and Research (FLAIR), Garmisch-Partenkirchen, 2009
M. Müller, W. Hofmann, G. Böhm, J. Rosskopf, E. Rönneberg, M. Ortsiefer, and M.-C. Amann: „1.55 µm InP-based short-cavity VCSELs with enhanced modulation-bandwidth of 15 GHz”, 35^th European Conference on Optical Communication (ECOC), Vienna, 2009
W. Hofmann, L. Grüner-Nielsen, E. Rönneberg, G. Böhm, M. Ortsiefer, and M.-C. Amann: „1.55 µm VCSEL Modulation Performance With Dispersion-Compensating Fibers“, IEEE Photonics Technology Letters, 21, 1072-1074, 2009
W. Hofmann, N. H. Zhu, M. Görblich, L. Xie, G. Böhm, M. Ortsiefer, and M.-C. Amann: „1.55 µm VCSEL Arrays for Optical Multiple-Input Multiple-Output (MIMO)”, Conference on Lasers and Electro Optics (CLEO), JTUD17, Baltimore, 2009
A. Hangauer, J. Chen, R. Strzoda, M. Fleischer, M. Ortsiefer, and M.-C. Amann: „Compact and Calibration-free Carbon Monoxide Sensor Using a 2.3 µm Vertical-Cavity Surface-Emitting Laser”, Sensor + Test, Nürnberg, 2009
W. Hofmann, M. Müller, G. Böhm, M. Ortsiefer, and M.-C. Amann: „1.55 µm VCSEL with Enhanced Modulation Bandwidth and Temperature Range“, IEEE Photonics Technology Letters, 21, 923-925, 2009
A. Gatto, A. Boletti, P. Boffi, C. Neumeyr, M. Ortsiefer, E. Rönneberg, and M. Martinelli: „1.3-µm VCSEL Transmission Performance up to 12.5 Gb/s for Metro Access Networks“, IEEE Photonics Technology Letters, 21, 778-780, 2009

W. Hofmann, M. Müller, G. Böhm, M. Ortsiefer, and M.-C. Amann: "1.55 µm InP-Based VCSEL with Enhanced Modulation Bandwidths > 10 GHz up to 85°C", Optical Fiber Conference(OFC), OTuK5,San Diego, 2009

2008

J. Chen, A. Hangauer , R. Strzoda, M. Ortsiefer, M. Fleischer, and M.-C. Amann: „Compact carbon mono-xide sensor using a continuously tunable 2.3 μm single-mode VCSEL“, 21^st Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS), 721-722, Newport Beach, 2008
W. Hofmann, M. Görblich, G. Böhm, M. Ortsiefer, L. Xie, and M.-C. Amann: "Long-Wavelength 2-D VCSEL Arrays for Optical Interconnects", Conference on Lasers and Electro Optics (CLEO), CMW7, San Jose, 2008

W. Hofmann, N.-H. Zhu, G. Böhm, M. Ortsiefer, L. Xie, L. Yu, and M.-C. Amann: "Optical MIMO with VCSEL arrays", 2008 IEEE/LEOS, Semiconductor Laser Workshop, Santa Fe, 2008

M. Ortsiefer, J. Rosskopf, E. Rönneberg, Y. Xu, K. Maisberger, R. Shau, C. Neumeyr, W. Hofmann, G. Böhm, A. Hangauer, J. Chen, R. Strzoda, and M.-C. Amann: "Extended Near-Infrared Wavelength VCSELs for Optical Sensing", IEEE 21^st International Semiconductor Laser Conference, Sorrento, 2008, ISBN: 978-1-4244-1783-4, 167-168
W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "One and Two-dimensional Long-Wavelength VCSEL arrays for WDM Applications and Optical Interconnects", IEEE 21^st International Semiconductor Laser Conference, Sorrento, 2008, ISBN: 978-1-4244-1783-4, 165-166
W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "High-Power Long-Wavelength VCSEL Arrays", IEEE 21^st International Semiconductor Laser Conference, Sorrento, 2008, ISBN: 978-1-4244-1783-4, 141-142
W. Hofmann, M. Ortsiefer, E. Rönneberg, C. Neumeyr, G. Böhm, and M.-C. Amann: "1.3 μm InGaAlAs/InP VCSEL for 10G Ethernet", IEEE 21^st International Semiconductor Laser Conference, Sorrento, 2008, ISBN: 978-1-4244-1783-4, 11-12
A. Hangauer, J. Chen, R. Strzoda, M. Ortsiefer, and M.-C. Amann: „Wavelength modulation spectroscopy with a widely tunable InP-based 2.3 µm vertical-cavity surface-emitting laser“, Optics Letters, 33, 1566-1568, 2008
M. Ortsiefer, W. Hofmann, E. Rönneberg, A. Boletti, A. Gatto, P. Boffi, J. Rosskopf, R. Shau, C. Neumeyr, G. Böhm, M. Martinelli, and M.-C. Amann: "High speed 1.3 µm VCSELs for 12.5 Gbit/s optical interconnects", Electron. Lett., 44, 974-975, 2008
S. T. Fard, W. Hofmann, P. T. Fard, G. Böhm, M. Ortsiefer, G. Böhm, E. Kwok, M.C. Amann, and L. Chrostowski: "Optical Absorption Glucose Measurements Using 2.3 µm Vertical-Cavity Semiconductor Lasers", IEEE Photonics Technology Letters, 20, 930-932, 2008
W. Hofmann, G. Böhm, M. Ortsiefer, and M.-C. Amann: "Long-wavelength VCSELs and VCSEL arrays for high-speed, high-power and high sensitivity", III. International Conference on Laser Processes and Components (LPC), Shanghai, 2008
P. Debernardi, B. Kögel, K. Zogal, P. Meissner, M. Maute, M. Ortsiefer, G. Böhm, and M.C. Amann: "Modal Properties of Long-Wavelength Tunable MEMS-VCSELs With Curved Mirrors: Comparison of Experiment and Modeling", IEEE J. Quantum Electron., 44, 391-399, 2008
W. Hofmann, E. Wong, G. Böhm, M. Ortsiefer, N. H. Zhu, and M.-C. Amann: "1.55 µm VCSEL Arrays for High-Bandwidth WDM PONs", IEEE Photonics Technology Letters, 20, 291-293, 2008
W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "Monolithic 2D high-power arrays of long-wavelength VCSELs ", Proc. of SPIE Photonics West, San Jose, Vol. 6908, 6908-06, 1-7, 2008

2007

E. Wong, C. Lim, A. G. Prasanna, K. L. Lee, A. Nirmalathas, C. Neumeyr, and M. Ortsiefer, “Simplified base station configuration for fiber-wireless application”, 33^rd European Conference on Optical Communication (ECOC), Tu3.3.7, Berlin, 2007
W. Hofmann, E. Wong, G. Böhm, M. Ortsiefer, and M.-C. Amann: "1  12 VCSEL Array at 1.55 µm for High-Bandwidth at Metro-Range”, 33^rd European Conference on Optical Communication (ECOC), Wed 8.1.3, Berlin, 2007
W. Hofmann, G. Böhm, M. Ortsiefer, M. Görblich, C. Lauer, N. H. Zhu, and M.-C. Amann: "Long-wavelength VCSELs for optical networks and trace-gas monitoring”, SPIE Optics East, Boston, 6766-14, 2007
W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "Long-wavelength high-power VCSEL Arrays", European Semiconductor Laser Workshop, Berlin, 2007
W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "Long-wavelength (=1.55 µm) monolithic VCSEL array with >3 W CW output power", Electron. Lett., 43, 2007, 1025-1026
M. Ortsiefer, J. Rosskopf, R. Shau, C. Gréus, and E. Rönneberg: "Recent developments and prospects of long-wavelength VCSELs for TDLS applications", Field Laser Applications in Industry and Research (FLAIR), Florence, 2007

G. Böhm, M. Grau, O. Dier, K. Windhorn, E. Rönneberg, J. Rosskopf, R. Shau, R. Meyer, M. Ortsiefer, and M.-C. Amann: "Growth of InAs-containing quantum wells for InP-based VCSELs emitting at 2.3 µm", Journal of Crystal Growth, 301-302, 941-944, 2007
W. Hofmann, M. Görblich, G. Böhm, M. Ortsiefer, H. Mulatz, and M.-C. Amann: "High-Power 1.55 µm VCSEL Arrays", CLEO Europe/IQEC 2007,CB4-2-TUE pp.1, Munich, 2007
W. Hofmann, G. Böhm, M. Ortsiefer, and M.-C. Amann: "Scaling Rules for High-Power 1.55 µm VCSEL Arrays", Conference on Lasers and Electro Optics (CLEO), CTuGG3, Baltimore, 2007

2006

M.-C. Amann and M. Ortsiefer: "Long-wavelength (≥ 1.3 µm) InGaAlAs-InP vertical-cavity surface-emitting lasers for applications in optical communication and sensing", Phys. Stat. Sol. (a), 203, 3538-3544, 2006

W. Hofmann, G. Böhm, M. Ortsiefer, E. Wong, and M.-C. Amann: "Uncooled High Speed (>11 GHz) 1.55 µm VCSELs for CWDM access networks", 32^nd European Conference on Optical Communication, Post-deadline session Th4.5.4, Cannes, 2006
W. Hofmann, N. H. Zhu, M. Ortsiefer, G. Böhm, Y. Liu, G. Z. Xu, and M.-C. Amann: "High speed modulation of BCB-passivated 1.55 µm VCSELs", Joint Symposium on Opto- and Microelectronic Devices and Circuits (SODC), Proceedings 119-121, Duisburg, 2006
L. Chrostowski, B. Faraji, W. Hofmann, R. Shau, M. Ortsiefer, and M.-C. Amann: "40 GHz Bandwidth and 64 GHz Resonance Frequency in Injection-Locked 1.55 µm VCSELs", IEEE 20^th International Semiconductor Laser Conference, Conference Digest 117-118, Hawaii, 2006
M. Ortsiefer, M. Grau, J. Rosskopf, R. Shau, K. Windhorn, E. Rönneberg, G. Böhm, W. Hofmann, O. Dier, and M.-C. Amann: "InP-based VCSELs with buried tunnel junction for optical communication and sensing in the 1.3-2.3 µm wavelength range", IEEE 20^th International Semiconductor Laser Conference, Conference Digest 113-114, Hawaii, 2006

M. Van Uffelen, J. Mols, M. Ortsiefer, and F. Berghmans: “Ionizing radiation effects on long-wavelength VCSELs up to MGy dose levels”, Radiation Effects on Components and Systems (RADECS), Athens, 2006

G. Böhm, O. Dier, R. Meyer, M.-C. Amann, M. Grau, K. Windhorn, E. Rönneberg, J. Rosskopf, R. Shau, and M. Ortsiefer: „Growth of InAs-containing quantum wells for InP-based VCSELs emitting at 2.3 µm“, 14^th International Conference on Molecular Beam Epitaxy, Conference Digest 104, Tokyo, 2006

W. Hofmann, N. H. Zhu, M. Ortsiefer, G. Böhm, Y. Liu, and M.-C. Amann: "High speed (>11 GHz) modulation of BCB-passivated 1.55 µm InGaAlAs-InP VCSELs", Electron. Lett., 42, 2006, 976-977
M. Ortsiefer, G. Böhm, M. Grau, K. Windhorn, E. Rönneberg, J. Rosskopf, R. Shau, O. Dier, and M.-C. Amann: "Electrically pumped room temperature CW VCSELs with 2.3 µm emission wavelength", Electron. Lett., 42, 640-641, 2006

W. Hofmann, N. H. Zhu, M. Ortsiefer, G. Böhm, J. Rosskopf, L. Chao, S. Zhang, M. Maute, and M.-C. Amann: "10-Gb/s Data Transmission Using BCB Passivated 1.55 µm InGaAlAs-InP VCSELs", IEEE Photonics Technology Letters, 18, 424-426, 2006
L. Chrostowski, X. Zhao, C. J. Chang-Hasnain, R. Shau, M. Ortsiefer, and M.-C. Amann: "50-GHz Optically Injection-Locked 1.55-µm VCSELs", IEEE Photonics Technology Letters, 18, 367-369, 2006

2005

M. Ortsiefer, S. Baydar, K. Windhorn, G. Böhm, J. Rosskopf, R. Shau, E. Rönneberg, W. Hofmann, and M.-C. Amann: "2.5 mW Single-Mode Operation of 1.55µm Buried Tunnel Junction VCSELs", IEEE Photonics Technology Letters, 17, 1596-1598, 2005

M. Ortsiefer, S. Baydar, K. Windhorn, E. Rönneberg, J. Rosskopf, R. Shau, M. Grau, G. Böhm, and M.-C. Amann: "Long-wavelength monolithic VCSEL arrays with high optical output power", Electron. Lett., 41, 807-808, 2005
M. Ortsiefer, R. Shau, J. Rosskopf, S. Baydar, K. Windhorn, and E. Rönneberg: "VCSELs in the 1.3-2 µm Wavelength Range for TDLS Applications", 5^th International Conference on Tunable Diode Laser Spectroscopy (TDLS), Florence, 2005

M.-C. Amann and M. Ortsiefer: "Single-Mode and Wavelength-Tunable Long-Wavelength VCSELs", OptoElectronics and Communications Conference (OECC), Seoul, 2005
M. Maute, G. Böhm, M.-C. Amann, F. Riemenschneider, B. Kögel, P. Meissner, and M. Ortsiefer: "Coupled Cavity Phenomena within MEMS-Tunable Long-Wavelength VCSELs", Conference on Lasers and Electro-Optics (CLEO), CThA4, Baltimore, 2005

L. Chrostowski, X. Zhao, R. Shau, M. Ortsiefer, M.-C. Amann, and C. J. Chang-Hasnain: "50 GHz Directly–Modulated Injection-Locked 1.55 µm VCSELs", Optical Fiber Conference(OFC), OThM2,Anaheim, 2005

2004

H. Halbritter, R. Shau, F. Riemenschneider, B. Kögel, M. Ortsiefer, J. Rosskopf, G. Böhm, M. Maute, M.-C. Amann, and P. Meissner: "Chirp and linewidth enhancement factor of 1.55 µm VCSEL with buried tunnel junction", Electron. Lett., 40, 1266-1268, 2004

M. Ortsiefer, M. Lackner, R. Shau, J. Rosskopf, G. Böhm, C. Lauer, M. Maute, F. Winter, and M.C. Amann: "Long-wavelength Vertical-Cavity Surface-Emitting Lasers for Sensing Applications in the 1.4 to 2 µm Wavelength Range", 8^th International Conference for Infrared Sensors and Systems (IRS), Nuremberg, 2004
X. Zhao, M. Moewe, L. Chrostowski, C.-H. Chang, R. Shau, M. Ortsiefer, M.-C. Amann, and C. J. Chang-Hasnain: "28 GHz optical injection-locked 1.55 µm VCSELs", Electron. Lett., 40, 476-478, 2004
L. Chrostowski, X. Zhao, R. Shau, M. Ortsiefer, M.-C. Amann, and C. J. Chang-Hasnain: "Very High Resonance Frequency (>40 GHz) Optical Injection-Locked 1.55 µm VCSELs", International Topical Meeting on Microwave Photonics (MWP), Ogunquit, 2004
C. Lauer, M. Ortsiefer, R. Shau, J. Rosskopf, G. Böhm, R. Meyer, and M.-C. Amann: "InP-based long-wavelength vertical-cavity surface-emitting lasers with buried tunnel junction", Phys. Stat. Sol. (C), 1, 2183-2209, 2004

C. Lauer, M. Ortsiefer, R. Shau, J. Rosskopf, G. Böhm, E. Rönneberg, F. Köhler, M. Maute, and M.-C. Amann: "80°C Continuous-Wave Operation of 2.01 µm Wavelength InGaAlAs/InP Vertical-Cavity Surface-Emitting Lasers", IEEE Photonics Technology Letters, 16, 2209-2211, 2004
R. Shau, M. Ortsiefer, J. Rosskopf, G. Böhm, C. Lauer, M. Maute, and M.-C. Amann, "Long-wavelength InP-based VCSELs with Buried Tunnel Junction: Properties and Applications", Vertical-Cavity Surface-Emitting Lasers VIII,Proceedings of SPIE, 5364, 1-15, 2004
M. Maute, F. Riemenschneider, M. Ortsiefer, R. Shau, P. Meissner, and M.-C. Amann: "A Novel 2-Chip Concept for Micro-Mechanically Tunable Long-Wavelength VCSELs for the 1.55 µm Wavelength Range", Photonics Europe, Strasbourg, 2004
W. Hofmann, N. H. Zhu, M. Ortsiefer, R. Shau, J. Rosskopf, G. Böhm, C. Qiuan, F. Köhler, M. Maute, C. Lauer, and M.-C. Amann: "High-Speed Vertical-Cavity Laser Diodes at 1.55 µm", Third Joint Symposium on Opto- & Microelectronic Devices and Circuits, Wuhan, 2004
M. Maute, F. Riemenschneider, G. Böhm, H. Halbritter, M. Ortsiefer, R. Shau, P. Meissner, and M.-C. Amann: "Micro-Mechanically Tunable Long Wavelength VCSEL with a Buried Tunnel Junction", Electron. Lett., 40, 430-431, 2004
C.-H. Chang, L. Chrostowski, M. Moewe, C. J. Chang-Hasnain, R. Shau, M. Ortsiefer, and M.C. Amann: "Injection-Locked 1.55 µm VCSELs with ~23 GHz Bandwidth", Optical Fiber Conference (OFC), Anaheim, 2004
C. Lauer, S. Szalay, M. Ortsiefer, R. Shau, J. Rosskopf, G. Böhm, F. Köhler, M. Maute, C. Lin, and M.-C. Amann: "Laser hygrometer using a vertical-cavity surface-emitting laser (VCSEL) with an emission wavelength of 1.84 µm", IEEE Transactions on Instrumentation and Measurement, 54, 1214-1218, 2005

2003

M. Ortsiefer, M. Fürfanger, J. Rosskopf, G. Böhm, F. Köhler, C. Lauer, M. Maute, W. Hofmann, and M.-C. Amann: "Singlemode 1.55 µm VCSELs with low threshold and high output power", Electron. Lett., 39, 1731-1732, 2003

R. Shau, H. Halbritter, F. Riemenschneider, M. Ortsiefer, J. Rosskopf, G. Böhm, M. Maute, P. Meissner, and M.-C. Amann: "Linewidth of InP-based 1.55 µm VCSELs with buried tunnel junction", Electron. Lett., 39, 1728-1729, 2003

M. Ortsiefer, R. Shau, J. Rosskopf, M. Fürfanger, M.-C. Amann, C. Lauer, M. Maute, G. Böhm, M. Lackner, and F. Winter: "InP-based VCSELs in the 1.4-2 µm wavelength range for optical communication and absorption spectroscopy", 16^th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2003), Proceedings WD4, Tucson, 2003

M.-C. Amann and M. Ortsiefer: "Long-wavelength InP-based VCSELs", 29^th European Conference on Optical Communication, Proceedings Tu1.5.1, Rimini, 2003
C. Lauer, M. Ortsiefer, R. Shau, J. Rosskopf, M. Maute, G. Böhm, F. Köhler, and M.-C. Amann, "Improvement of the differential series resistance of buried tunnel junction (BTJ) VCSELs", European Semiconductor Laser Workshop, Turin, 2003
M. Ortsiefer, R. Shau, M. Lackner, G. Totschnig, F. Winter, J. Rosskopf, C. Lauer, and M.-C. Amann: "Long-wavelength vertical-cavity surface-emitting lasers for molecular absorption spectroscopy in the 1.5-2 µm range", 4^th International Conference on Tunable Diode Laser Spectroscopy (TDLS), Conference Digest 33, Zermatt, 2003
M. Lackner, G. Totschnig, F. Winter, R. Shau, J. Rosskopf, M. Ortsiefer, and M.C. Amann: "Pollutant reduction by in-situ combustion diagnostics at high pressures using a novel near infrared diode laser, the vertical-cavity surface-emitting laser (VCSEL)", CLEAN AIR, Lisbon, 2003
M. Lackner , G. Totschnig, F. Winter, R. Shau, M. Ortsiefer, J. Rosskopf, and M.C. Amann: "Spektroskopischer Einsatz neuer, langwelliger (bis 2 µm) Diodenlaser (VCSEL) für schwierige Bedingungen", Technisches Messen, 6, 294-305, 2003
M. Lackner, G. Totschnig, F. Winter, R. Shau, J. Rosskopf, M. Ortsiefer, and M.-C.Amann: "Rapid high resolution absorption spectroscopy using long wavelength InP-based VCSELs at 1.54 µm (NH₃), 1.68 µm (CH₄) and 1.80 µm (H₂O, HCl)", Conference on Lasers and Electro-Optics (CLEO), Baltimore, 2003
G. Totschnig, M. Lackner, F. Winter, R. Shau, M. Ortsiefer, J. Rosskopf, and M.C. Amann: "High speed vertical-cavity surface-emitting laser (VCSEL) absorption spectroscopy of ammonia (NH₃) near 1.54 µm", Applied Physics B, 76, 603-608, 20033

G. Totschnig, M. Lackner, R. Shau, M. Ortsiefer, J. Rosskopf, M.-C. Amann, and F. Winter: "1.8 µm vertical-cavity surface-emitting laser absorption measurements of HCl, H₂O and CH₄", Meas. Sci. Technol., 14, 472-478, 2003
M. Ortsiefer, R. Shau, J. Rosskopf, M. Fürfanger, M.-C. Amann, C. Lauer, M. Maute, G. Böhm, M. Lackner, and F. Winter: "InP-based VCSELs in the 1.4 to 2 µm wavelength range for optical communication and absorption spectroscopy", Lasers and Electro-Optics Society (LEOS), 16^th Annual Meeting, 2, 505-506, 2003

C. Lauer, M. Ortsiefer, R. Shau, J. Rosskopf, G. Böhm, M. Maute, F. Köhler, and M.-C. Amann: "Electrically pumped room temperature CW-VCSELs with emission wavelength of 2 µm", Electron. Lett., 39, 57-58, 2003
M. Lackner, G. Totschnig, F. Winter, M. Ortsiefer, M.-C. Amann, R. Shau, and J. Rosskopf: "Demonstration of methane spectroscopy using a vertical-cavity surface-emitting laser at 1.68 µm with up to 5 MHz repetition rate", Meas. Sci. Technol., 14, 101-106, 2003

M. Ortsiefer, R. Shau, J. Rosskopf, and M.-C. Amann: "Long-wavelength InP-based VCSELs", chapter 12 in Vertical-Cavity Surface-Emitting Laser Devices, Springer ISBN 3-540-67851-4, 367-381, 2003

2002

M. Ortsiefer, R. Shau, F. Mederer, R. Michalzik, J. Rosskopf, G. Böhm, F. Köhler, C. Lauer, M. Maute, and M.-C. Amann: "High-speed modulation up to 10 Gbit/s with 1.55 µm wavelength InGaAlAs VCSELs", Electron. Lett., 38, 1180-1181, 2002

R. Shau, M. Ortsiefer, J. Rosskopf, G. Böhm, F. Köhler, and M.-C. Amann: "InP-based vertical-cavity surface-emitting lasers with high output power and large modulation bandwidth", IEEE 18^th International Semiconductor Laser Conference, Conference Digest 143-144, Garmisch-Partenkirchen, 2002

G. Böhm, M. Ortsiefer, R. Shau, J. Rosskopf, R. Meyer, F. Mederer, and M.-C. Amann: "InP-based VCSEL technology covering the wavelength range from 1.3 to 2 µm", International Conference on Molecular Beam Epitaxy, Conference Digest 79-80, San Francisco, 2002

M. Ortsiefer, R. Shau, F. Mederer, R. Michalzik, J. Rosskopf, G. Böhm, F. Köhler, C. Lauer, M. Maute, M.-C. Amann: "High-speed data transmission with 1.55 µm vertical-cavity surface-emitting lasers", 28^th European Conference on Optical Communication (ECOC), Post-deadline session PD4.9, Copenhagen, 2002
M.-C. Amann, M. Ortsiefer: "Long-wavelength InP-based VCSELs", 5^th International Conference on Mid-Infrared Optoelectronic Materials and Devices, Annapolis / Maryland, 2002

M. Ortsiefer, M.-C. Amann: "Long-wavelength InP-based vertical-cavity surface-emitting lasers", Conference on Lasers and Electro-Optics (CLEO), Technical Digest 437, ISBN 1-55752-705-9, Long Beach, 2002

2001

M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, J. Rosskopf, and M.-C. Amann: "Thermal conductivity analysis and device performance of 1.55 µm InGaAlAs/InP buried tunnel junction VCSELs", Phys. Stat. Sol. (A), 188, 913-919, 2001
R. Shau, M. Ortsiefer, J. Rosskopf, G. Böhm, F. Köhler, and M.-C. Amann: "Vertical-cavity surface-emitting laser diodes at 1.55 µm with large output power and high operation temperature", Electron. Lett., 37, 1295-1296, 2001
R. Shau, M. Ortsiefer, and M.-C. Amann: "InP-based long-wavelength VCSELs with buried tunnel junction", European Semiconductor Laser Workshop, Ghent, 2001
M. Ortsiefer and M.-C. Amann: "Recent progress of long wavelength VCSEL research", International Conference on Solid State Devices and Materials, Conference Digest 592-593, Tokyo, 2001
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, J. Rosskopf, G. Steinle, C. Degen, and M.-C. Amann: "High-temperature 2.5 Gb/s vertical-cavity surface-emitting lasers at 1.55 µm wavelength", 27^th European Conference on Optical Communication, Amsterdam, 2001
M.-C. Amann, M. Ortsiefer, R. Shau, J. Rosskopf, F. Köhler, and G. Böhm: "Long-wavelength buried-tunnel-junction vertical-cavity surface-emitting lasers", Advances in Solid State Physics, 41, Springer ISBN 3-540-42000-2, 75-85, 2001
G. Böhm, M. Ortsiefer, R. Shau, F. Köhler, R. Meyer, and M.-C. Amann: "AlGaInAs/InP-epitaxy for long wavelength vertical-cavity surface-emitting lasers", Journal of Crystal Growth, 319-323, 2001
M.-C. Amann, M. Ortsiefer: "InP-based VCSELs for 1.55 µm wavelength range", Indium Phosphide and Related Materials (IPRM), Conference Digest 15-16, Nara, 2001
M. Ortsiefer "Langwellige Vertikalresonator-Laserdioden im Materialsystem InGaAlAs/InP", „Selected Topics of Semiconductor Physics and Technology“, 35, ISBN 3-932749-35-3, 2001
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, J. Rosskopf, and M.-C. Amann: "Design and technology of long-wavelength InP based VCSELs", 10^th European Conference on Integrated Optics, International Workshop on Microcavity Light Sources, Paderborn, 2001
M. Ortsiefer, R. Shau, M.-C. Amann: "Buried tunnel-junction long-wavelength vertical-cavity surface-emitting lasers", Optics in Information Systems, 12, 12, 2001
M. Ortsiefer, R. Shau, G. Böhm, M. Zigldrum, J. Rosskopf, F. Köhler, and M.-C. Amann: "90°C Continuous-wave operation of 1.83-µm vertical-cavity surface-emitting lasers", IEEE Photon. Technol. Lett., 12, 1435-1437, 2000
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, M. Zigldrum, J. Rosskopf, and M.-C. Amann: "Index-guided long-wavelength InGaAlAs/InP vertical-cavity surface-emitting lasers", Advances in Solid State Physics, 40, Springer ISBN 3-528-03164-6, 577-586, 2000
R. Shau, M. Ortsiefer, G. Böhm, F. Köhler, and M.-C. Amann: "InP-based vertical-cavity surface-emitting lasers for 1.5-1.8 µm wavelength range", IEEE 17^th International Semiconductor Laser Conference, Conference Digest 153-154, Monterey, 2001

2000

M.-C. Amann, M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, M. Zigldrum, and J. Rosskopf: "High-performance vertical-cavity surface-emitting lasers for telecommunication wavelengths", 26^th European Conference on Optical Communication (ECOC), Munich, 2000
G. Böhm, M. Ortsiefer, R. Shau, F. Köhler, R. Meyer, and M.-C. Amann: "AlGaInAs/InP-epitaxy for long wavelength vertical-cavity surface-emitting lasers", International Conference on Molecular Beam Epitaxy, Conference Digest 115, Beijing, 2000
R. Shau, M. Ortsiefer and M.-C. Amann: "InP-based VCSELs for 1.5-1.8 µm wavelength range", European Semiconductor Laser Workshop, Berlin, 2000
R. Shau, M. Ortsiefer, M. Zigldrum, J. Rosskopf, G. Böhm, F. Köhler, and M.-C. Amann: "Low-threshold InGaAlAs/InP vertical-cavity surface-emitting laser diodes for 1.8 µm wavelength range", Electron. Lett., 36, 1286-1287, 2000
M. Ortsiefer, R. Shau, M. Zigldrum, G. Böhm, F. Köhler, M.-C. Amann: "Submilliamp long-wavelength InP-based vertical-cavity surface-emitting laser with stable linear polarisation", Electron. Lett., 36, 1124-1126, 2000
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, and M.-C. Amann: "Room-temperature cw 1.5 µm InGaAlAs/InP vertical-cavity laser with high efficiency", Conference on Lasers and Electro-Optics (CLEO), postdeadline CPD 11-1 / 21, San Franciso, 2000
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, and M.-C. Amann: "Low-threshold index-guided 1.5 µm long-wavelength vertical-cavity surface-emitting laser with high efficiency", Appl. Phys. Lett., 76, 2179-2181, 2000
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, G. Abstreiter, and M.-C. Amann: "Low-resistance InGa(Al)As tunnel junctions for long-wavelength vertical-cavity surface-emitting lasers", Jpn. J. Appl. Phys., 39, 1727-1729, 2000
M. Ortsiefer, R. Shau, G. Böhm, F. Köhler, and M.-C. Amann: "Room-temperature operation of index-guided 1.55 µm InP-based vertical-cavity surface-emitting laser", Electron. Lett., 36, 437-438, 2000
M. Ortsiefer, R. Shau und M.-C. Amann: "InP-basierende VCSELs für Telekommunikationswellenlängen", DPG-Frühjahrstagung, HL 29.2, Regensburg, 2000

1999

M.-C. Amann, M. Ortsiefer, and R. Shau: "Low-resistive tunneling contacts for InP based 1.55 µm VCSELs", European Semiconductor Laser Workshop, Paris, 1999
M. Ortsiefer, M. Lohner, R. Shau, G. Böhm, and M.-C. Amann: "Low-resistance InGaAs tunnel junctions on InP for long-wavelength VCSELs", Semiconductor and Integrated Optoelectronics (SIOE), Cardiff, 1999