Dr. Haiyan An Profile

Dr. Haiyan An

Head of Semiconductor Development Department at TRUMPF Photonics

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Author

Publications (13)

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 | 13 March 2015 Paper

Packaging of high-power bars for optical pumping and direct applications

Stefan Heinemann, Haiyan An, Tobias Barnowski, John Jiang, Viorel Negoita, Robert Roff, Thilo Vethake, Konstantin Boucke, Georg Treusch

Proceedings Volume 9348, 934807 (2015) https://doi.org/10.1117/12.2080968

KEYWORDS: Packaging, Reliability, Multiplexing, Copper, Optical pumping, Semiconductor lasers, Diodes, Heatsinks, Disk lasers, Ceramics

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Proceedings Article | 7 March 2014 Paper

Wavelength stabilization of high power laser systems using volume holographic gratings

Viorel Negoita, Yufeng Li, Tobias Barnowski, John Jiang, Haiyan An, Robert Roff, Ming Shih, Thilo Vethake, Tina Gottwald, Sven Schad, Georg Treusch

Proceedings Volume 8965, 89650S (2014) https://doi.org/10.1117/12.2040622

KEYWORDS: Laser systems engineering, High power lasers, Disk lasers, Reflectivity, Volume holography, Holography, Pulsed laser operation, Semiconductor lasers, Absorption, Diodes

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

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Proceedings Article | 26 February 2013 Paper

High brightness laser systems incorporating advanced laser bars

Stephan Strohmaier, Thilo Vethake, Mark Gottdiener, Jens Wunderlin, Viorel Negoita, Yufeng Li, Tobias Barnowski, Tim Gong, Haiyan An, Georg Treusch

Proceedings Volume 8605, 86050J (2013) https://doi.org/10.1117/12.2004927

KEYWORDS: Semiconductor lasers, Laser systems engineering, High power lasers, Disk lasers, Fiber couplers, Laser development, Laser applications, Collimation, Photonics, Solid state lasers

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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 | 9 February 2012 Paper

Industrial high-power diode lasers: reliability, power, and brightness

Stephan Strohmaier, Haiyan An, Thilo Vethake

Proceedings Volume 8241, 82410Z (2012) https://doi.org/10.1117/12.906832

KEYWORDS: Semiconductor lasers, Reliability, High power lasers, High power diode lasers, Diodes, Laser development, Structural design, Semiconducting wafers, Product engineering, Collimation

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Proceedings Article | 24 May 2005 Paper

High-performance surface-normal modulators based on stepped quantum wells

H. Mohseni, W. Chan, H. An, A. Ulmer, D. Capewell

Proceedings Volume 5814, (2005) https://doi.org/10.1117/12.607320

KEYWORDS: Modulators, Quantum wells, Signal attenuation, Modulation, Absorption, Sensors, Unmanned aerial vehicles, Optical modulators, Capacitance, Optical testing

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Proceedings Article | 19 August 1998 Paper

Stability of strained MQWs in laser structure

Zhi Jin, Shuren Yang, Chunsheng Ma, Haiyan An, Benzhong Wang, Shiyong Liu

Proceedings Volume 3547, (1998) https://doi.org/10.1117/12.319624

KEYWORDS: Laser stabilization, Information operations, Optoelectronics, Transmission electron microscopy, Process modeling, Differential equations, Cladding

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Proceedings Article | 3 October 1996 Paper

Bright blue electroluminescence from Poly(N-vinylcarbazole) doped with two dyes

Baijun Chen, Jingying Hou, Haiyan An, Shanhua Xue, Jingsong Huang, Shiyong Liu

Proceedings Volume 2897, (1996) https://doi.org/10.1117/12.252981

KEYWORDS: Electroluminescence, Electrodes, Aluminum, Polymers, Diodes, Glasses, Luminescence, Excitons, Semiconductors, Light emitting diodes

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Proceedings Article | 3 October 1996 Paper

Blue light-emitting diodes from polymer blends

Jingsong Huang, Haiyan An, Jingying Hou, Baijun Chen, Shiyong Liu, Haifeng Zhang, Wenjing Tian, Jiachong Shen

Proceedings Volume 2897, (1996) https://doi.org/10.1117/12.252937

KEYWORDS: Polymers, Electroluminescence, Organic light emitting diodes, Light emitting diodes, Electrodes, Aluminum, Blue light emitting diodes, Heat treatments, Luminescence, Visible radiation

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Proceedings Article | 30 September 1996 Paper

Blue emission dye doped polymer-based electroluminescent devices for display

Haiyan An, Shanhua Xue, Baijun Chen, Jingying Hou, Jingsong Huang, Shiyong Liu, Jiaqi Yu

Proceedings Volume 2892, (1996) https://doi.org/10.1117/12.253348

KEYWORDS: Electroluminescence, Polymers, Aluminum, Electrodes, Molecules, Temperature metrology, Electrons, Polymer thin films, Glasses, Resistance

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Proceedings Article | 24 September 1996 Paper

1.48-um InGaAs/InGaAsP separated confinement strained layer multiple quantum well lasers

Haiyan An, Shuren Yang, Hong-Bo Sun, Yuheng Peng, Shiyong Liu

Proceedings Volume 2886, (1996) https://doi.org/10.1117/12.251916

KEYWORDS: Laser damage threshold, Reflectivity, Laser applications, Waveguides, Quantum wells, Continuous wave operation, Ion implantation, Ion lasers, Pulsed laser operation, Ions

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Showing 5 of 13 publications

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