A Design of a Temperature-Controlled Current Source Module for a Tunable Semiconductor Laser

2020 ◽  
Vol 10 (01) ◽  
pp. 47-59
Author(s):  
众 吕
Keyword(s):  
Semiconductor Laser ◽  
Current Source ◽  
Temperature Controlled

scholarly journals Research on Power Stability Control of Semiconductor Laser

2018 ◽  
Vol 232 ◽  
pp. 04086
Author(s):  
Qian Guo ◽  
Xiaodong Zhang ◽  
Fengnian Tian
Keyword(s):  
Semiconductor Laser ◽  
Current Source ◽  
Optical Power ◽  
Stability Control ◽  
Working Environment ◽  
Constant Current ◽  
Constant Current Source ◽  
Loop Control ◽  
The Stability ◽  
Hardware Circuit

In order to guarantee the stable emission power and good working environment of semiconductor laser, a new hardware circuit is selected and designed to realize automatic optical power control, in which a negative feedback operation amplifier circuit is adopted to form the constant current source, and an optoelectronic feedback to realize closed loop control in this paper. And then, the corresponding steady control circuit is also designed, so that the stable power can be output. The experimental results show that the stability of laser power is better than 0.74% when the system works.

Frequency Stabilization of Semiconductor Laser Based on TMS320F2812

2014 ◽  
Vol 551 ◽  
pp. 280-283
Author(s):  
Yi Lin Jiang ◽  
Zheng Yan Li ◽  
En Sheng Dong ◽  
Juan Juan Li
Keyword(s):  
Semiconductor Laser ◽  
Current Source ◽  
Frequency Stability ◽  
Frequency Stabilization ◽  
Feedback Signal ◽  
Current Loop ◽  
Stabilization System ◽  
Stabilization Method ◽  
A Current

A novel frequency stabilization method is proposed in this paper. The variation of frequency is used as the feedback signal, and the system is composed of a loop temperature loop and a current loop of the semiconductor laser. The hardware and the software of the frequency stabilization system based on DSP are outlined. The simulation result of the digital-controlled current source is presented, which shows that the frequency stability of the system reaches 6.73×10-7.

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