采用铅盐二极管激光器的量子噪声限制频率调制光谱学

Quantum noise-limited FM spectroscopy with a lead-salt diode laser.

作者信息

Carlisle C B, Cooper D E, Preier H

出版信息

Appl Opt. 1989 Jul 1;28(13):2567-76. doi: 10.1364/AO.28.002567.

DOI:10.1364/AO.28.002567

PMID:20555560

Abstract

This paper reports the demonstration of quantum-noise-limited sensitivity in frequency modulation spectroscopy (FMS) with a lead-salt diode laser operating in the 4.8-microm region. Experimentally determined sensitivities of 10(-7) in a 1-Hz bandwidth have been demonstrated for detection of CO and CO(2) in a single-pass absorption cell. The high sensitivity obtained with our FMS apparatus can be attributed to the use of improved lead-salt diode lasers, a new optical fringe reduction method, and careful attention to optical processing of the diode laser beam.

摘要

本文报道了在4.8微米波段工作的铅盐二极管激光器的频率调制光谱学（FMS）中实现量子噪声极限灵敏度的演示。在单通道吸收池中检测一氧化碳（CO）和二氧化碳（CO₂）时，已证明在1赫兹带宽内实验测定的灵敏度为10⁻⁷ 。我们的FMS仪器所获得的高灵敏度可归因于使用了改进的铅盐二极管激光器、一种新的光学条纹减少方法以及对二极管激光束光学处理的精心关注。