量子级联(QC)激光器是唯一能在室温产生中红外辐射的半导体激光器。它的宽调谐范围、高输出功率和单模工作的特性,使得它非常适用于高分辨率光谱分析。结合中红外光谱区是气体分子的基频强吸收特性,基于室温脉冲工作的量子级联激光器的吸收光谱检测技术以其灵敏度高、选择性强及响应快速等特点,成为痕量气体探测的有效方法。介绍了基于分布式量子级联激光器的脉间光谱技术,通过分析比较不同工作参数下的激光光谱信号,寻求最佳的激光器工作参数,并且在选定的工作参数下对目标气体的吸收谱线进行测量,得到了中心在2178.2cm-1附近的N2O的吸收谱线。

标    签 量子级联激光器 脉间光谱技术 N2O quantum-cascade lasers inter-pulse spectroscopy N2O
 

Quantum cascade (QC) laser is the only semiconductor laser which can produce mid-infrared radiation in the room temperature. This kind of laser enjoys wide range of tuning, large output power and single mode operation. All these merits make it appropriate for the high resolution spectrum analysis. The absorption spectrum monitoring technology based on the QC laser pulsed operating in the room temperature, combining with the strong absorption of the gas molecule in the basic frequency, has become an effective way to monitor the trace gas with the characteristic of high sensitivity, good selectivity and fast response. The inter-pulse spectroscopy based on a room-temperature distributed-feedback pulsed QC laser is introduced. The laser spectrum under different working parameters is compared and analyzed, with the aim of finding out the optimistic working parameters of laser. The N2O absorption spectrum centered at 2178.2cm-1 is obtained.

中图分类号 O433.1
 
      

所属栏目

基金项目 中科院知识创新重要方向性项目(KJCX2-SW-W27);国家自然科学基金重点项目 (50534050) 资助课题

收稿日期 2009-6-16

修改稿日期 2009-10-28




引用该论文 WANG Min,ZHANG Yu-jun,TANG Yuan-yuan,KAN Rui-feng,CHEN Zhen-yi,LIU Jian-guo,LIU Wen-qing. Inter-pulse spectroscopy based on room-temperature pulsed quantum-cascade laser[J]. Optical Technique, 2010, 36(3): 323～327 (in chinese)
王敏,张玉钧,汤媛媛,阚瑞峰,陈臻懿,刘建国,刘文清. 基于室温脉冲工作量子级联激光器的脉间光谱[J]. 光学技术, 2010, 36(3): 323～327 【1】Durry G,Megie G．Atmospheric CH4 and H2O monitoring with near-infrared InGaAs laser diodes by the SDLA, a balloonborne spectrometer for tropospheric and stratospheric in situ measurements［J］. Appl. Opt., 1999, 38(36): 7342-7354.
 
【2】Tittel F K, Richter D, Fried A. Mid-infrared applications in spectroscopy［J］. Top.Appl.Phys.,2003,89: 445-516.
 
【3】Taslakov M, Simeonov V, van den Bergh H. Open path atmospheric spectroscopy using room temperature operated pulsed quantum cascade laser［J］. Spectrochimica Acta Part A ,2006,63:1002-1008.
 
【4】Stéphane Blaser. High power and single frequency quantum cascade lasers for chemical sensing［DB/OL］.http ://www.alpeslasers.ch/Conference-papers/QCL workshop 03.pdf,2005.
 
【5】Namjou K, Cai S, Whittaker E A, et al. Sensitive absorption spectroscopy with a room-temperature distributed-feedback quantum-cascade laser［J］.Opt. Lett., 1998,23:219-221.
 
【6】Nelson D D, McManus B, et al. High precision measurements of atmospheric nitrous oxide and methane using thermoelectrically cooled mid-infrared quantum cascade lasers and detectors［J］. Spectrochimica Acta Part A, 2004 (60): 3325-3335.
 
【7】McCulloch M T, Normand E L, Langford N, et al. Highly sensitive detection of trace gases using the time-resolved frequency down-chirp from pulsed quantum-cascade lasers［J］. J. Opt. Soc. Am. B, 20( 8), 2003.
 
【8】Nelson D D, Shorter J H, McManus J B. Sub part-per-billion detection of nitric oxide in air using a thermoelectrically cooled mid-infrared quantum cascade laser spectrometer［J］. J. Appl. Phys. B, 2002,75:343-350.
 

 单极型量子级联激光器的发明及其进展

 基于室温脉冲量子级联激光器的脉内光谱技术研究

 基于量子级联激光器的气体检测研究

 基于量子级联激光器的中远红外高反射率测量

 基于室温量子级联激光器的脉内光谱技术测量N₂O

 Al组分对AlGaN/GaN量子级联激光器性能的影响

 自发辐射对量子级联激光器发光噪声的影响

 N₂O为氧源金属有机化学气相沉积生长ZnO薄膜的光学性能研究

 量子级联激光器的电路模型分析

 量子级联激光器调制特性的电路模拟