Dr. Yi-Cheng Hsu Profile

Dr. Yi-Cheng Hsu

at National Pingtung Univ of Science and Technology

SPIE Involvement:

Author

Publications (4)

Proceedings Article | 4 March 2013 Paper

Performance enhancement of high-temperature glass-based phosphor-converted white light-emitting diodes employing SiO2

Chun-Chin Tsai, Cheng-Feng Yue, Wei-Chih Cheng, Shi-Sheng Hu, Yi-Cheng Hsu, Jyun-Sian Liao, Wood-Hi Cheng

Proceedings Volume 8641, 86411T (2013) https://doi.org/10.1117/12.2003097

KEYWORDS: Glasses, Quantum efficiency, Silica, Reliability, Particles, Light emitting diodes, Sol-gels, YAG lasers, Diffusion, Coating

Read Abstract +

Proceedings Article | 3 February 2009 Paper

Decay of lumen and chromaticity of high-power phosphor-converted white-light-emitting diodes in thermal aging

Jau-Sheng Wang, Chun-Chin Tsai, Ming-Hung Chen, Yi-Cheng Hsu, Hung-Lieh Hu, Chao-Wei Lee, Wood-Hi Cheng

Proceedings Volume 7231, 72310O (2009) https://doi.org/10.1117/12.807560

KEYWORDS: Silicon, Light emitting diodes, Blue light emitting diodes, Doping, Reliability, Diodes, Packaging, Refractive index, YAG lasers, Thermography

Read Abstract +

Proceedings Article | 13 February 2008 Paper

Decay mechanisms of lumen and chromaticity for high-power phosphor-based white-light-emitting diodes in thermal aging

Chun-Chin Tsai, Ming-Hung Chen, Chao-Wei Lee, Yuan-Tsun Lo, Yi-Cheng Hsu, Wood-Hi Cheng

Proceedings Volume 6910, 691011 (2008) https://doi.org/10.1117/12.760906

KEYWORDS: Light emitting diodes, YAG lasers, Silicon, Transmittance, Refractive index, Packaging, Diodes, Reliability, Blue light emitting diodes, Thermal effects

Read Abstract +

Proceedings Article | 30 August 2005 Paper

A novel post-weld-shift measurement and compensation technique in butterfly-type laser module packages

Yi-Cheng Hsu, Y.C. Tsai, Y.S. Hung, W.H. Cheng

Proceedings Volume 5877, 58770D (2005) https://doi.org/10.1117/12.613095

KEYWORDS: Laser welding, Fiber lasers, Semiconductor lasers, Packaging, Cameras, Laser processing, Optical alignment, Imaging systems, Laser systems engineering, Laser packaging

Read Abstract +

One of the greatest challenges in the packaging of laser modules using laser welding technique is to use a reliable and accurate joining process. However, during welding, due to the material property difference between welded components, the rapid solidification of the welded region and the associated material shrinkage often introduced a post-weld-shift (PWS) between welded components. For a typical single-mode fiber application, if the PWS induced fiber alignment shift by the laser welding joining process is even a few micrometers, up to 50 % or greater loss in the coupled power may occur. The fiber alignment shift of the PWS effect in the laser welding process has a significant impact on the laser module package yield. Therefore, a detailed understanding of the effects of PWS on the fiber alignment shifts in laser-welded laser module packages and then the compensation of the fiber alignment shifts due to PWS effects are the key research subjects in laser welding techniques for optoelectronic packaging applications. Previously, the power losses due to PWS in butterfly-type laser module packages have been qualitatively corrected by applying the laser hammering technique to the direction of the detected shift. Therefore, by applying an elastic deformation to the welded components and by observing the corresponding power variation, the direction and magnitude of the PWS may be predicted. Despite numerous studies on improving the fabrication yields of laser module packaging using the PWS correction in laser welding techniques by a qualitative estimate, limited information is available for the quantitative understanding of the PWS induced fiber alignment shift which can be useful in designing and fabricating high-yield and high-performance laser module packages. The purpose of this paper is to present a quantitative probing of the PWS induced fiber alignment shift in laser-welded butterfly-type laser module packaging by employing a novel technique of a high-magnification camera with image capture system (HMCICS). The benefit of using the HMCICS technique to determine the fiber alignment shift are quantitatively measure and compensate the PWS direction and magnitude during the laser-welded laser module packages. This study makes it possible to probe the nonlinear behavior of the PWS by using a novel HMCICS technique that results in a real time quantitative compensation of the PWS in butterfly-type laser module packages, when compared to the currently available qualitatively estimated techniques to correct the PWS2. Therefore, the reliable butterfly-type laser modules with high yield and high performance used in lightwave transmission systems may thus be developed and fabricated.

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years