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Proceedings Paper

Design of laser diode stable output system
Author(s): Bo Liu; Rui-ming Cao
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Paper Abstract

High-stability output's system of laser diode is introduced in this paper. The system which is based on the MCU of MSP430 has been designed light power feedback loop and coller of TEC. It includes stable current, protecting circuit, light power feedback loop, temperature controlling, power display and so on. It is also able to control and show the power at the real time. The power could be set by botton too. The software of slow start up, slow close and the protecting relay are adopted by MCU. DRV592 is introduced as PWM driver to control the current of TEC. The duty cycle is generate by MCU. In order to control temperature, it is changed to influence the current of TEC. The power that is sampled by photodiode which is integrated in the laser diode is controlled by the micro-processing. The laser is monitored by voltage control circuit and current control circuit at the real time.

Paper Details

Date Published: 7 January 2008
PDF: 6 pages
Proc. SPIE 6824, Semiconductor Lasers and Applications III, 68240M (7 January 2008); doi: 10.1117/12.756370
Show Author Affiliations
Bo Liu, Harbin Univ. of Science and Technology (China)
Rui-ming Cao, Harbin Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6824:
Semiconductor Lasers and Applications III
Lianghui Chen; Hiroyuki Suzuki; Paul T. Rudy; Ninghua Zhu, Editor(s)

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