Progress in Semiconductor Lasers

On behalf of the editors, I am delighted to present this special edition of the IEEE Photonics Journal, focusing on Progress in Semiconductor Lasers.

This feature section includes expanded versions of many of the fine papers that were previously presented at the 27th International Semiconductor Laser Conference, in Potsdam, Germany in 2021. 

Selected original manuscripts on the topic of semiconductor lasers that were not presented at the ISLC have also been included.

Overall, the very broad range of topics in the science and technology of semiconductor lasers addressed by the ISLC community is well represented in this special edition. Specifically, the accepted papers include excellent examples of progress in high-power and high-brightness lasers, communications lasers and integrated semiconductor photonics, optical amplifiers, silicon compatible lasers, VCSELs, photonic crystal and nanocavity lasers, grating controlled lasers, quantum cascade lasers, mid IR sources, InP, GaAs and Sb-based materials, quantum dot lasers and GaN-based lasers.

We thank the authors for their support of this special issue, and the guest editors and the IEEE team for their hard work in making this special issue possible.

Topically Sorted Papers in Sequence

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HIGH POWER DIODE LASERS
	60% Efficient Monolithically Wavelength-Stabilized970-nm DBR Broad-Area Lasers Paul Crump, Md. Jarez Miah, Martin Wilkens Jörg Fricke,Hans Wenzel & Andrea Knigge
	Optimizing Vertical and Lateral Waveguides of kW-Class Laser Bars for Higher Peak Power, Efficiency and Lateral Beam Quality Md. Jarez Miah, Anisuzzaman Boni, Seval Arslan, Dominik Martin, Pietro Della Casa & Paul Crump
	Stability of ZnSe-passivated laser facets cleaved in air and in ultra-high vacuum Jos E. Boschker1, Uwe Spengler, Peter Ressel, Anna Mogilatenko & Andrea Knigge
	Extreme Double/Triple Asymmetric Epitaxial Structure based Diode Lasers for High Powers and High Efficiencies Xiaolei Zhao, Siwei Zeng, Lance Sweat & Lin Zhu
VCSELs
	VCSEL Quick Fabrication for Assessment of Large Diameter Epitaxial Wafers Jack Baker, Sara Gillgrass, Craig P. Allford, Tomas Peach, Curtis Hentschel, Tracy Sweet, J. Iwan Davies, Samuel Shutts & Peter M. Smowton
	Comparing the Dual-Mode VCSEL in OM4-MMF and GI-SMF links for NRZ-OOK and 16-QAM-OFDM Transmissions Shao-Yung Lee, Chih-Hsien Cheng, Hsien-Yao Tseng, Xin Chen, Wei-Chi Lo, Kangmei Li, Chia-Hsuan Wang, Cheng-Ting Tsai , Hao-Chung Kuo, Ming-Jun Li, & Gong-Ru Lin
	Narrow emission of blue GaN-based vertical-cavity surface-emitting lasers with a curved mirror Kentaro Hayashi , Tatsushi Hamaguchi, Jared A. Kearns , Noriko Kobayashi, Maho Ohara, Tomohiro Makino,Shoetsu Nagane, Koichi Sato, Yuki Nakamura, Yukio Hoshina, Tatsuro Jyoukawa, Takumi Watanabe, Yuichiro Kikuchi, Maiko Ito, Eiji Nakayama, Rintaro Koda, & Noriyuki Futagawa
	Low Divergence Coherently Coupled Vertical Cavity Surface Emitting Ring Laser Arrays Nusrat Jahan, Katherine A. Lakomy, Pawel Strzebonski , B. J. Thompson, & K. D. Choquette
MIR/ICL
	Reverse-Taper Mid-Infrared Quantum Cascade Lasers for Coherent Power Scaling Jae Ha Ryu , Benjamin Knipfer, Jeremy D. Kirch, Member, Robert A. Marsland, Dan Botez, Tom Earles, Chris Galstad, Morgan Turville-Heitz, Chris Sigler,  Axel Strömberg, Yan-Ting Sun, Sebastian Lourdudoss, & Luke J. Mawst
	Modeling of amplitude squeezing in a pump-noise-suppressed interband cascade laser Shiyuan Zhao & Frédéric Grillo
NANOLASER / PHOTONIC CRYSTAL LASERS
	Optimization of a Photonic Crystal Nanocavity Using Covariance Matrix Adaptation Evolution Strategy Kohei Takahashi & Toshihiko Baba
INTEGRATION
	1300 nm Semiconductor Optical Amplifier compatible with an InP Monolithic Active/Passive Integration Technology Joel Hazan, Stefanos Andreou, Dzmitry Pustakhod, Steven Kleijn, Kevin A. Williams, & Erwin A. J. M. Bente
	CW Emission and Self-Pulsing in a III-V/SiN Hybrid Laser With Narrow Band Mirror Cristina Rimoldi,  Lorenzo L. Columbo, Jock Bovington,Sebastian Romero-García, & Mariangela Gioannini
	Backscattering effects on high-speed modulation of strongly injection-locked whistle-geometry semiconductor ring lasers Gennady A. Smolyakov & Marek Osiński
COMMUNICATION LASERS
	51-nm Uniform-Intensity Tuning of Superstructure Grating Active-DBR Laser for 2-μm Wavelength Band Takahiko Shindo, Yuta Ueda, Makoto Shimokozono, Tomonari Sato, Wataru Kobayashi, Shigeru Kanazawa, Mingchen Chen, & Hideaki Matsuzaki
	A six-section photonic integrated transmitter with chirp control for extension of the transmission reach Ankit Sharma, Aleksandra Maria Kaszubowska-Anandarajah, Mohab Nabil Hammad, Michael Wallace, Jules Braddell, Frank Smyth,& Prince M. Anandarajah