Acta Photonica Sinica, Volume. 43, Issue 6, 614003(2014)
A Temperature Controller for Nearinfrared Semiconductor Laser Used in Gas Detection
In order to decrease the design complexity of software and to enhance the control stability and accuracy of distributed feedback laser′s emitting wavelength, a temperature controller for semiconductor laser used in gas detection was developed, which includes digital signal processor, temperature setting circuit, temperature sampling circuit, analog proportionintegrationdifferential circuit, thermal electric colling control circuit, etc. A wavelengthtunable distributed feedback laser centered at 1 860 nm used for humidity detection was driven using the proposed temperature controller. Experimental results indicate that, the control scale on temperature is 10 ℃~50 ℃, the accuracy is ±0.05 ℃, and the temperatureestablished time is less than 60 s; with different driving current and temperature supplied by the system, the operation wavelength of the laser shows good tuning characteristics; the four spectral curves from four days′ measurements almost coincide with each other, demonstrating stable performances of the controller.
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HUANG Jianqiang, ZHAI Bing, HE Qixin, YE Weilin, ZHENG Chuantao, WANG Yiding. A Temperature Controller for Nearinfrared Semiconductor Laser Used in Gas Detection[J]. Acta Photonica Sinica, 2014, 43(6): 614003
Received: Dec. 24, 2013
Accepted: --
Published Online: Aug. 18, 2014
The Author Email: Jianqiang HUANG (huangjq11@mails.jlu.edu.cn)