Photoacoustic Detection of Atmospheric Absorptions Using a cw Ring Dye-Laser

K. Reddy
{"title":"Photoacoustic Detection of Atmospheric Absorptions Using a cw Ring Dye-Laser","authors":"K. Reddy","doi":"10.1364/pas.1981.mb9","DOIUrl":null,"url":null,"abstract":"The intracavity dye-laser photoacoustic-detection technique is extremely sensitive permitting detection of weak absorptions in benzene1 with cross sections as low as 10−27 cm2 at 9.3 kpa (70 Torr) of vapor pressure (absorption coefficient α ~ 10−9 cm−1). The high sensitivity of this technique makes it useful for detecting weak atmospheric absorptions in the near-IR and visible regions. Atmospheric absorption characteristics of high- and low-energy lasers (for example the chemical iodine laser at 1.315 μm and the blue/green laser at 496 nm) are required for selecting and optimizing a particular laser for communications and military applications requiring a long pathlength in the atmosphere. The photoacoustic detection technique is advantageous because it directly measures only the absorption loss which is the principal source of thermal blooming in high-energy laser propagation. Moreover, the small size of photoacoustic cells makes them ideal for quantitative studies of collisional broadening, lineshape, temperature dependence, and the simulation of real-time airborne variations. Similar studies are tedious and time-consuming tasks with large-volume multipass cells.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"26 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Second International Meeting on Photoacoustic Spectroscopy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/pas.1981.mb9","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The intracavity dye-laser photoacoustic-detection technique is extremely sensitive permitting detection of weak absorptions in benzene1 with cross sections as low as 10−27 cm2 at 9.3 kpa (70 Torr) of vapor pressure (absorption coefficient α ~ 10−9 cm−1). The high sensitivity of this technique makes it useful for detecting weak atmospheric absorptions in the near-IR and visible regions. Atmospheric absorption characteristics of high- and low-energy lasers (for example the chemical iodine laser at 1.315 μm and the blue/green laser at 496 nm) are required for selecting and optimizing a particular laser for communications and military applications requiring a long pathlength in the atmosphere. The photoacoustic detection technique is advantageous because it directly measures only the absorption loss which is the principal source of thermal blooming in high-energy laser propagation. Moreover, the small size of photoacoustic cells makes them ideal for quantitative studies of collisional broadening, lineshape, temperature dependence, and the simulation of real-time airborne variations. Similar studies are tedious and time-consuming tasks with large-volume multipass cells.
利用连续波环形染料激光器光声探测大气吸收
腔内染料激光光声探测技术非常灵敏,在9.3 kpa (70 Torr)蒸气压(吸收系数α ~ 10−9 cm−1)下,可以探测到截面低至10−27 cm2的苯1的微弱吸收。该技术的高灵敏度使得它可以用于检测近红外和可见光区域的微弱大气吸收。高能量和低能激光器(例如1.315 μm波长的化学碘激光器和496nm波长的蓝/绿激光器)的大气吸收特性是选择和优化通信和军事应用中需要在大气中长路径的特定激光器所必需的。光声探测技术的优势在于它只直接测量高能激光传播过程中产生热晕的主要来源——吸收损耗。此外,光声电池的小尺寸使其非常适合用于碰撞加宽,线形,温度依赖性和实时空气变化模拟的定量研究。类似的研究是冗长而耗时的任务,需要大量的多通道细胞。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信