Finite element analysis of laser-diode heat emission and design of PI fuzzy cooling system

Fusheng Yu; Xiaoqin Shen; Changlin Leng; Zhi Li

doi:10.1117/12.576528

20 January 2005 Finite element analysis of laser-diode heat emission and design of PI fuzzy cooling system

Fusheng Yu, Xiaoqin Shen, Changlin Leng, Zhi Li

Proceedings Volume 5628, Semiconductor Lasers and Applications II; (2005) https://doi.org/10.1117/12.576528
Event: Photonics Asia, 2004, Beijing, China

Abstract

In order to realize the coupling of the crystal spectrum line, the wavelength output by the laser-diode must be adjusted to be accordant with the peak value absorbed by laser crystal in the solid laser of the laser-diode pump. In this paper, the finite element analysis (FEA) of the heat emission of the to-3 encapsulated laser-diode was researched and an accurate PI+Fuzzy temperature control system was developed. The refrigeration and the accurate temperature control of the high-power laser-diode was realized by the semiconductor refrigerator. Combined with fussy control and PI control, a full solid refrigerator of the laser-diode was developed. AT89C51 MCU and CRI^[1] fussy control arithmetic were used in this system. So the system has high temperature control precision and little chatting. The rate of change of the optical power peak value output by the laser-diode was less than 1%.

Citation Download Citation

Fusheng Yu, Xiaoqin Shen, Changlin Leng, and Zhi Li "Finite element analysis of laser-diode heat emission and design of PI fuzzy cooling system", Proc. SPIE 5628, Semiconductor Lasers and Applications II, (20 January 2005); https://doi.org/10.1117/12.576528

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