High-Accuracy and High-Stability Constant Current Power for Semiconductor Lasers

被引：3
作者：
Tian Y. [1 ]
Li C. [1 ]
Zhang Z. [1 ]
机构：
[1] School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2019年 / 53卷 / 03期
关键词：
Constant current driving; Current limiting protection; Laser technique; Semiconductor laser;
D O I：
10.7652/xjtuxb201903001
中图分类号：
学科分类号：
摘要：
The output power and wavelength of semiconductor lasers are affected by the input current whose tiny change may lead to significant changes in the lasers' wavelength and optical power. In this paper, a high-accuracy and high-stability constant current power is developed. Field effect tube and operational amplifier are used to improve the stability of current, and high stability reference power is used to enhance the accuracy of current. High reliability is achieved by slow-start of power, current limiting protection and start-stop control circuit. The results show that this power supply is able to continuously adjust the output current from 0 mA to 200 mA, with a current accuracy of 0.01 mA and long-term stability of about 0. 004%, and the protection circuit is highly reliable. © 2019, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：1 / 5
页数：4
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