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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 12 — Jun. 15, 2006
  • pp: 1896–1898

Heavy water detection using ultra-high-Q microcavities

Andrea M. Armani and Kerry J. Vahala  »View Author Affiliations


Optics Letters, Vol. 31, Issue 12, pp. 1896-1898 (2006)
http://dx.doi.org/10.1364/OL.31.001896


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Abstract

Ultra-high-Q optical microcavities ( Q > 10 7 ) provide one method for distinguishing chemically similar species. Resonators immersed in H 2 O have lower quality factors than those immersed in D 2 O due to the difference in optical absorption. This difference can be used to create a D 2 O detector. This effect is most noticeable at 1300 nm , where the Q ( H 2 O ) is 10 6 and the Q ( D 2 O ) is 10 7 . By monitoring Q, concentrations of 0.0001 % [1 part in 10 6 per volume] of D 2 O in H 2 O have been detected. This sensitivity represents an order of magnitude improvement over previous techniques. Reversible detection was also demonstrated by cyclic introduction and flushing of D 2 O .

© 2006 Optical Society of America

OCIS Codes
(230.0040) Optical devices : Detectors
(230.1150) Optical devices : All-optical devices
(230.5750) Optical devices : Resonators

ToC Category:
Optical Devices

History
Original Manuscript: February 6, 2006
Revised Manuscript: March 23, 2006
Manuscript Accepted: March 26, 2006

Citation
Andrea M. Armani and Kerry J. Vahala, "Heavy water detection using ultra-high-Q microcavities," Opt. Lett. 31, 1896-1898 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-12-1896


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