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Title: Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing

Abstract

The thermal lensing phenomenon is used as the basis for measurement of weak optical absorptions when a cell containing the sample to be investigated is inserted into a normally continuous-wave operation laser-pumped dye laser cavity for which the output coupler is deliberately tilted relative to intracavity circulating laser light, and pulsed laser output ensues, the pulsewidth of which can be related to the sample absorptivity by a simple algorithm or calibration curve. A minimum detection limit of less than 10.sup.-5 cm.sup.-1 has been demonstrated using this technique.

Inventors:
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865611
Patent Number(s):
4544274
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; measurement; weak; optical; absorptions; thermally; induced; laser; pulsing; thermal; lensing; phenomenon; basis; cell; containing; sample; investigated; inserted; normally; continuous-wave; operation; laser-pumped; dye; cavity; output; coupler; deliberately; tilted; relative; intracavity; circulating; light; pulsed; ensues; pulsewidth; related; absorptivity; simple; algorithm; calibration; curve; minimum; detection; limit; 10; -5; cm; -1; demonstrated; technique; output coupler; calibration curve; thermally induced; laser output; optical absorption; dye laser; laser cavity; laser light; pulsed laser; cell containing; weak optical; optical absorptions; cell contain; thermal lens; detection limit; /356/

Citation Formats

Cremers, David A., and Keller, Richard A. Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing. United States: N. p., 1985. Web.
Cremers, David A., & Keller, Richard A. Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing. United States.
Cremers, David A., and Keller, Richard A. Tue . "Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing". United States. https://www.osti.gov/servlets/purl/865611.
@article{osti_865611,
title = {Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing},
author = {Cremers, David A. and Keller, Richard A.},
abstractNote = {The thermal lensing phenomenon is used as the basis for measurement of weak optical absorptions when a cell containing the sample to be investigated is inserted into a normally continuous-wave operation laser-pumped dye laser cavity for which the output coupler is deliberately tilted relative to intracavity circulating laser light, and pulsed laser output ensues, the pulsewidth of which can be related to the sample absorptivity by a simple algorithm or calibration curve. A minimum detection limit of less than 10.sup.-5 cm.sup.-1 has been demonstrated using this technique.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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