2021年10月13日 · 光腔衰荡光谱技术（crds），来自单频激光二极管的光束进入由两面或多面高反射率反射镜构成的衰荡腔。 PULSAR-a温室气体分析仪 使用三镜腔，以支持连续行波光波。

2014年11月21日 · The document summarizes the principles and applications of cavity ring down spectroscopy (CRDS). It describes how CRDS works by using an optical cavity to greatly increase the effective path length of light, enabling precise measurements of weak absorptions.

2016年11月23日 · Applications of cavity ring-down spectroscopy (CRDS) in atmospheric chemistry Bristol, United Kingdom University of Bristol Bristol Overview Absorption spectroscopy Principles of cavity ring-down spectroscopy Applications in atmospheric chemistry Sensing of trace constituents (C2H2, NO2, IO) Aerosol particles Molecular photochemistry 1.

1 ppt 1 ppb 1 ppm Time c min min Incoherent Infrared Spectroscopy (FTIR) Gas Chromatography + Mass Spectrometry Gas Chromatography + Ionization Detector Real-time Picarro VOC-CRDS Ease of use easy med hard. Compounds with the same mass 10 •distinguishing acetic acid and IPA requires more than mass alone –fragmentation spectrum –reagent ...

3 What is CRD spectroscopy CRDS is a sensitive absorption technique in which the rate of absorption in an optical cavity is measured It has significantly high sensitivity The effective absorption path length is very long The sensitivity is independent of intensity fluctuations of the light source Small fractional absorptions sub- ppm levels CO ppm (open air) A Simple CRDS Experiment A laser ...

光学谐振腔是光腔衰荡光谱（CRDS）检测技术中最为核心的构成部件，它主要采用两片具有超高反射率（≥99.99%）的腔镜构成激光往复反射的衰荡光路，在大大提升了光腔内反射次数的同时，也可形成极长的吸收光程，从而实现超高精度的气体吸收光谱监测功能。 光腔衰荡光谱技术与其他直接吸收光谱法不同的是，后者是通过测量对比光通过样气前后的能量变化来得到光的吸收强度从而推算出气体浓度，而光腔衰荡根据光在样品腔内的衰荡时间来得出能量衰减率从而推算出 …

Cavity Ring Down Spectroscopy (CRDS) is a highly sensitive technique for measuring absorption in optical cavities, particularly effective for detecting small concentrations of gases like CO2 in the atmosphere.

CRDS 能在几秒钟或更短的时间内对气体进行监测，灵敏度可以达到 ppb 级别，甚至有些气体可以达到 ppt 级别。 CRDS 技术，来自单频激光二极管的光束进入由两面或多面高反射率反射镜构成的衰荡腔。

2015年7月3日 · Ⅳ照明设计与新理念 光腔衰荡光谱（CRDS）技术的应用与展望 张豪俊张善端 复旦大学电光源研究所 摘要：本文首先介绍光腔衰荡光谱（CRDS）检测技术的原理，然后分别对国内外的近期研究进展进行介绍，包括 了等离子体诊断方面的新颖的应用，对于大气中各类 ...

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