Ultrasensitive thermal lens spectroscopy of water

被引：42

作者：

Cruz, Renato Antonio ^{[1
]}

Marcano, Aristides ^{[2
]}

Jacinto, Carlos ^{[3
]}

Catunda, Tomaz ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Phys Sao Carlos, Sao Carlos, SP, Brazil

[2] Delaware State Univ, Ctr Res & Educ Opt Sci & Applicat, Dover, DE 19901 USA

[3] Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, AL, Brazil

来源：

OPTICS LETTERS | 2009年 / 34卷 / 12期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

ULTRAVIOLET-ABSORPTION-SPECTRUM; PURE WATER; COEFFICIENTS; SCATTERING; NM;

D O I：

10.1364/OL.34.001882

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A recently developed dual-beam configuration that optimizes the thermal lens technique has been used to obtain the absorption spectrum of pure water from 350 to 528 nm. Our results indicate the minimum linear absorption coefficient smaller than 2 X 10(-5) cm(-1) between 360 and 400 nm. This value is lower than previous literature data, and it is blueshifted. Absorption coefficients as small as 2 X 10(-7) cm(-1) can be measured for water using 1 W of excitation power. A detection limit of similar to 6 X 10(-9) cm(-1) (P=1 W) for CCl4 was estimated, which represents, to the best of our knowledge, the highest sensitivity obtained in small absorption measurements in liquids. (C) 2009 Optical Society of America

引用

页码：1882 / 1884

页数：3

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