High-Speed Mid-Infrared Frequency Modulation Spectroscopy Based on Quantum Cascade Laser

被引：6

作者：

Peng, Chen ^{[1
,2
]}

Chen, Gang ^{[1
,2
]}

Tang, Jianping ^{[1
,2
]}

Wang, Lijun ^{[3
]}

Wen, Zhongquan ^{[1
,2
]}

Zhou, Haijun ^{[1
,2
]}

Martini, Rainer ^{[4
]}

机构：

[1] Chongqing Univ, Key Lab Optoelect Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Key Disciplines Lab Novel Micronano Devices & Sys, Minist Educ, Chongqing 400044, Peoples R China

[3] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China

[4] Stevens Inst Technol, Dept Phys & Engn Phys, Hoboken, NJ 07030 USA

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2016年 / 28卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Frequency modulation spectroscopy; middle-infrared spectroscopy; quantum cascade laser; gas sensing; SENSITIVE DETECTION; BAND;

D O I：

10.1109/LPT.2016.2554359

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We demonstrated a high-speed mid-infrared frequency modulation spectroscopy scheme based on a distributed-feedback quantum Cascade laser for the application in trace gas sensing by means of all-optical frequency modulation. With this method, the modulation frequency spectrum of a gas sample can be obtained within the mid-infrared pulse duration of similar to 200 ns. A frequency modulation of the middle infrared lasing optical frequency was achieved in quantum Cascade laser with a modulation frequency of 200 MHz by illuminating with a 1550-nm near-infrared laser. For CO gas, with 2-mW near-infrared illumination, the noise-equivalent sensitivity of the frequency modulation spectroscopy was estimated to be 0.12 ppmv for an absorption length of 6.1 m, indicating an improvement by a factor of 7 compared with Voigt-fitted direct absorption spectroscopy (0.84 ppmv). The frequency modulation signal was found to be proportional to the incident near-infrared power, and therefore, the noise-equivalent sensitivity is expected to be further improved by increasing the near-infrared illumination power. This high-speed frequency modulation spectroscopy based on the distributed-feedback quantum Cascade laser has promising applications in high-speed and high-sensitivity gas sensing.

引用

页码：1727 / 1730

页数：4

共 22 条

[21] Z-scan measurement of the nonlinear refractive index of graphene [J].

Zhang, Han ;

Virally, Stephane ;

Bao, Qiaoliang ;

Ping, Loh Kian ;

Massar, Serge ;

Godbout, Nicolas ;

Kockaert, Pascal .

OPTICS LETTERS, 2012, 37 (11) :1856-1858

[22]

Zhang J. C., 2012, APPL PHYS LETT, V100

← 1 2 3 →