Dr. Yihan Xiong Profile

Dr. Yihan Xiong

at TRUMPF Photonics Inc

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 14 March 2023 Presentation + Paper

High-power semiconductor laser chips for fiber-laser-based Lidar pump applications

Xiaohang Liu, Yihan Xiong, Ching-Long Jiang, Prasanta Modak, Ayesha Jamil, Xi Liu, Stewart McDougall

Proceedings Volume 12403, 1240309 (2023) https://doi.org/10.1117/12.2650446

KEYWORDS: Semiconductor lasers, LIDAR, Fiber lasers, Heatsinks, Reliability, Chip manufacturing, Thermal stability, Polarization

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Proceedings Article | 4 March 2022 Presentation + Paper

Advances in 976nm single emitter broad area semiconductor diode lasers for 300W+ fiber laser pump module applications

Yihan Xiong, Ching-long Jiang, Ayesha Jamil, Xiaohang Liu, Xi Liu, Prasanta Modak, Stewart McDougall, Konstantin Boucke

Proceedings Volume 11983, 1198305 (2022) https://doi.org/10.1117/12.2610381

KEYWORDS: Semiconductor lasers, Fiber lasers, Reliability, Semiconductors, Laser development, Failure analysis, Resistance, Polarization, Diodes, Copper

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Proceedings Article | 19 February 2018 Presentation + Paper

Advanced chip designs and novel cooling techniques for brightness scaling of industrial, high power diode laser bars

S. Heinemann, S. McDougall, G. Ryu, L. Zhao, X. Liu, C. Holy, C.-L. Jiang, P. Modak, Y. Xiong, T. Vethake, S. Strohmaier, B. Schmidt, H. Zimer

Proceedings Volume 10514, 105140Y (2018) https://doi.org/10.1117/12.2290638

KEYWORDS: Semiconductor lasers, Reliability, Refractive index, Diodes, Quantum wells, Laser applications, Waveguides, Near field, Packaging, Temperature metrology

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Proceedings Article | 13 March 2015 Paper

Advancements in high-power high-brightness laser bars and single emitters for pumping and direct diode application

Haiyan An, Ching-Long Jiang, Yihan Xiong, Qiang Zhang, Aloysius Inyang, Jason Felder, Alexander Lewin, Robert Roff, Stefan Heinemann, Berthold Schmidt, Georg Treusch

Proceedings Volume 9348, 93480I (2015) https://doi.org/10.1117/12.2080175

KEYWORDS: Semiconductor lasers, Diodes, Fiber lasers, High power lasers, Laser systems engineering, Reliability, Laser development, Disk lasers, Fiber couplers, Packaging

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Proceedings Article | 7 March 2014 Paper

Methods for slow axis beam quality improvement of high power broad area diode lasers

Haiyan An, Yihan Xiong, Ching-Long Jiang, Berthold Schmidt, Georg Treusch

Proceedings Volume 8965, 89650U (2014) https://doi.org/10.1117/12.2040986

KEYWORDS: Waveguides, Semiconductor lasers, Thermal effects, Broad area laser diodes, Refractive index, Laser systems engineering, Near field, High power lasers, Fiber coupled lasers, Optical filters

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Proceedings Article | 26 February 2013 Paper

Advances in high power and high brightness laser bars with enhanced reliability

Haiyan An, Ching-Long (John) Jiang, Yihan Xiong, Aloysius Inyang, Qiang Zhang, Alexander Lewin, Stephan Strohmaier, Georg Treusch

Proceedings Volume 8605, 86050U (2013) https://doi.org/10.1117/12.2004979

KEYWORDS: Reliability, Semiconductor lasers, Polarization, High power lasers, Diodes, Packaging, Laser systems engineering, Plating, Failure analysis, Semiconducting wafers

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The advances in laser-diode technology have enabled high efficiency direct diode base modules to emerge as a building block for industrial high power laser systems. Consequently, these systems have been implemented with advance robust, higher-brightness and reliable laser sources for material processing application. Here at the company, we use low-fill factor bars to build fiber-coupled and passively cooled modules, which form the foundation for “TruDiode,” the series of TRUMPF direct diode laser systems that can perform in the multi-kilowatt arena with high beam quality. However, higher reliable output power, additional efficiency and greater slow axis beam quality of the high power laser bars are necessary to further increase the brightness and reduce the cost of the systems. In order to improve the slow axis beam quality, we have optimized the bar epitaxial structures as well as the lateral design. The detailed near field and far field studies of the slow axis for each individual emitters on the bar provide us with information about the dependency of beam quality as a function of the drive current. Based on these study results for direct diode application, we have optimized the high brightness bar designs at 900-1070nm wavelengths. In addition, high power and high efficiency laser bars with high fill factors have been used to build the pump sources for thin disc laser systems at TRUMPF Photonics. For better system performances with lower costs, we have further optimized bar designs for this application. In this paper, we will give an overview of our recent advances in high power and brightness laser bars with enhanced reliability. We will exhibit beam quality study, polarization and reliability test results of our laser bars in the 900-1070nm wavelengths region for coarse wavelength multiplexing. Finally, we will also present the performance and reliability results of the 200W bar, which will be used for our next generation thin disk laser pump source.

Proceedings Article | 7 May 2012 Paper

High-power vertical-cavity surface-emitting lasers for diode pumped solid-state lasers

Robert Van Leeuwen, Yihan Xiong, Jean-Francois Seurin, Guoyang Xu, Alexander Miglo, Qing Wang, Bing Xu, Wei-Xiong Zou, Daizong Li, James Wynn, Viktor Khalfin, Chuni Ghosh

Proceedings Volume 8381, 83810I (2012) https://doi.org/10.1117/12.920601

KEYWORDS: Vertical cavity surface emitting lasers, Nd:YAG lasers, Q switched lasers, Ultraviolet radiation, High power lasers, Crystals, Solid state lasers, Diode pumped solid state lasers, Solids, Pulsed laser operation

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Proceedings Article | 15 February 2012 Paper

High power VCSEL array pumped Q-switched Nd:YAG lasers

Yihan Xiong, Robert Van Leeuwen, Laurence Watkins, Jean-Francois Seurin, Guoyang Xu, Alexander Miglo, Qing Wang, Chuni Ghosh

Proceedings Volume 8235, 82350M (2012) https://doi.org/10.1117/12.908414

KEYWORDS: Vertical cavity surface emitting lasers, Nd:YAG lasers, Q switched lasers, Optical pumping, Q switching, High power lasers, Crystals, Pulsed laser operation, Solids

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Proceedings Article | 7 February 2012 Paper

High-power vertical-cavity surface-emitting lasers for solid-state laser pumping

Jean-Francois Seurin, Guoyang Xu, Alexander Miglo, Qing Wang, Robert Van Leeuwen, Yihan Xiong, Wei-Xiong Zou, Daizong Li, James Wynn, Viktor Khalfin, Chuni Ghosh

Proceedings Volume 8276, 827609 (2012) https://doi.org/10.1117/12.906864

KEYWORDS: Vertical cavity surface emitting lasers, Nd:YAG lasers, Solid state lasers, Optical pumping, High power lasers, Absorption, Semiconductor lasers, Gallium arsenide, Photography

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Proceedings Article | 16 February 2011 Paper

High power 808 nm VCSEL arrays for pumping of compact pulsed high energy Nd:YAG lasers operating at 946 nm and 1064 nm for blue and UV light generation

Robert Van Leeuwen, Yihan Xiong, Laurence Watkins, Jean-Francois Seurin, Guoyang Xu, Qing Wang, Chuni Ghosh

Proceedings Volume 7912, 79120Z (2011) https://doi.org/10.1117/12.873952

KEYWORDS: Vertical cavity surface emitting lasers, Nd:YAG lasers, Ultraviolet radiation, Q switched lasers, Crystals, Q switching, Absorption, High power lasers, Phase modulation, Lasers

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SPIE Journal Paper | 1 May 2007

Frequency stabilization of a mode-locked external cavity diode laser to a high-finesse cavity

Yihan Xiong, Sytil Murphy, John Carlsten, Kevin Repasky

OE, Vol. 46, Issue 05, 054203, (May 2007) https://doi.org/10.1117/12.10.1117/1.2738982

KEYWORDS: Mode locking, Semiconductor lasers, Laser stabilization, Modulation, Mirrors, Servomechanisms, Laser resonators, Optical engineering, Picosecond phenomena, Optical resonators

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SPIE Journal Paper | 1 December 2006

Design and characteristics of a tapered amplifier diode system by seeding with continuous-wave and mode-locked external cavity diode laser

Yihan Xiong, Sytil Murphy, John Carlsten, Kevin Repasky

OE, Vol. 45, Issue 12, 124205, (December 2006) https://doi.org/10.1117/12.10.1117/1.2404925

KEYWORDS: Diodes, Optical amplifiers, Semiconductor lasers, Collimation, Single mode fibers, Mode locking, Continuous wave operation, Picosecond phenomena, Beam shaping, Modulation

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Showing 5 of 12 publications

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