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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 12 — Jun. 15, 2009
  • pp: 1774–1776

Fiber loop ring-down spectroscopy with a long-period grating cavity

Sean Pu and Xijia Gu  »View Author Affiliations

Optics Letters, Vol. 34, Issue 12, pp. 1774-1776 (2009)

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We have successfully demonstrated cavity ring-down spectroscopy in a fiber ring with a long-period grating cavity. The cavity couples > 99 % of light from core to cladding, interacts with the environment surrounding the fiber, and then couples unabsorbed light back into the fiber core. This design provides a relatively large evanescent wave absorption area while maintaining a very low loss for the fiber ring. The effectiveness of this cavity as a sensitive chemical sensor is also demonstrated.

© 2009 Optical Society of America

OCIS Codes
(230.4555) Optical devices : Coupled resonators
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Optical Devices

Original Manuscript: March 16, 2009
Revised Manuscript: May 9, 2009
Manuscript Accepted: May 10, 2009
Published: June 2, 2009

Sean Pu and Xijia Gu, "Fiber loop ring-down spectroscopy with a long-period grating cavity," Opt. Lett. 34, 1774-1776 (2009)

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