Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field

doi:10.1088/1674-1056/24/2/024206

›› 2015, Vol. 24 ›› Issue (2): 24206-024206.doi: 10.1088/1674-1056/24/2/024206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field

陈伟根, 万福, 邹经鑫, 顾朝亮, 周渠

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China

收稿日期:2014-06-05 修回日期:2014-08-04 出版日期:2015-02-05 发布日期:2015-02-05
基金资助:
Project supported by the Special Funds for the Development of National Major Scientific Instruments and Equipment, China (Grant No. 2012YQ160007) and the National Natural Science Foundation of China (Grant No. 51277185).

Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field

Chen Wei-Gen (陈伟根), Wan Fu (万福), Zou Jing-Xin (邹经鑫), Gu Zhao-Liang (顾朝亮), Zhou Qu (周渠)

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China

Received:2014-06-05 Revised:2014-08-04 Online:2015-02-05 Published:2015-02-05
Contact: Wan Fu E-mail:wanfuhappy@163.com
Supported by:
Project supported by the Special Funds for the Development of National Major Scientific Instruments and Equipment, China (Grant No. 2012YQ160007) and the National Natural Science Foundation of China (Grant No. 51277185).

摘要/Abstract

摘要： In this paper, the frequency-locking and threshold current-lowering effects of a quantum cascade laser are studied and achieved. Combined with cavity-enhanced absorption spectroscopy, the noninvasive detection of H₂ with a prepared concentration of 500 ppm in multiple dissolved gases is performed and evaluated. The high frequency selectivity of 0.0051 cm^-1 at an acquisition time of 1 s allows the sensitive detection of the (1-0) S(1) band of H₂ with a high accuracy of (96.53± 0.29)% and shows that the detection limit to an absorption line of 4712.9046 cm^-1 is approximately (17.26± 0.63) ppm at an atmospheric pressure and a temperature of 20 ℃.

关键词: quantum cascade laser, frequency locking, threshold current lowering, cavity-enhanced absorption spectroscopy

Abstract: In this paper, the frequency-locking and threshold current-lowering effects of a quantum cascade laser are studied and achieved. Combined with cavity-enhanced absorption spectroscopy, the noninvasive detection of H₂ with a prepared concentration of 500 ppm in multiple dissolved gases is performed and evaluated. The high frequency selectivity of 0.0051 cm^-1 at an acquisition time of 1 s allows the sensitive detection of the (1-0) S(1) band of H₂ with a high accuracy of (96.53± 0.29)% and shows that the detection limit to an absorption line of 4712.9046 cm^-1 is approximately (17.26± 0.63) ppm at an atmospheric pressure and a temperature of 20 ℃.

Key words: quantum cascade laser, frequency locking, threshold current lowering, cavity-enhanced absorption spectroscopy

中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

42.50.Gy

42.15.Eq (Optical system design) 25.20.Dc (Photon absorption and scattering)

陈伟根, 万福, 邹经鑫, 顾朝亮, 周渠. Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field[J]. , 2015, 24(2): 24206-024206.

Chen Wei-Gen (陈伟根), Wan Fu (万福), Zou Jing-Xin (邹经鑫), Gu Zhao-Liang (顾朝亮), Zhou Qu (周渠). Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field[J]. Chin. Phys. B, 2015, 24(2): 24206-024206.

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Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field

Frequency-locking and threshold current-lowering effects of a quantum cascade laser and an application in gas detection field

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