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:
-
- Los Alamos, NM
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 865611
- Patent Number(s):
- 4544274
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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 = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}
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