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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 12 — Jun. 15, 2009
  • pp: 1882–1884

Ultrasensitive thermal lens spectroscopy of water

Renato Antonio Cruz, Arístides Marcano, Carlos Jacinto, and Tomaz Catunda  »View Author Affiliations


Optics Letters, Vol. 34, Issue 12, pp. 1882-1884 (2009)
http://dx.doi.org/10.1364/OL.34.001882


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Abstract

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 × 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 × 10 7 cm 1 can be measured for water using 1 W of excitation power. A detection limit of 6 × 10 9 cm 1 ( P = 1 W ) for C Cl 4 was estimated, which represents, to the best of our knowledge, the highest sensitivity obtained in small absorption measurements in liquids.

© 2009 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6250) Spectroscopy : Spectroscopy, condensed matter
(300.6430) Spectroscopy : Spectroscopy, photothermal

ToC Category:
Spectroscopy

History
Original Manuscript: March 31, 2009
Revised Manuscript: May 9, 2009
Manuscript Accepted: May 13, 2009
Published: June 11, 2009

Citation
Renato Antonio Cruz, Arístides Marcano, Carlos Jacinto, and Tomaz Catunda, "Ultrasensitive thermal lens spectroscopy of water," Opt. Lett. 34, 1882-1884 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-12-1882

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