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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 21 — Nov. 1, 2004
  • pp: 2461–2463

Time-domain fiber laser hydrogen sensor

Yu. O. Barmenkov, A. Ortigosa-Blanch, A. Diez, J. L. Cruz, and M. V. Andrés  »View Author Affiliations


Optics Letters, Vol. 29, Issue 21, pp. 2461-2463 (2004)
http://dx.doi.org/10.1364/OL.29.002461


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Abstract

We report a novel scheme for a fiber-optic hydrogen sensor based on an erbium-doped fiber laser with a palladium-coated tapered fiber within the laser cavity. The tapered fiber acts as a hydrogen-sensing element. When the sensing element is exposed to a hydrogen atmosphere, its attenuation decreases, changing the cavity losses and leading to a modification of the laser transient. The hydrogen concentration is obtained by simple measurement of the buildup time of the laser. This technique translates the measurement of hydrogen concentration into the time domain, and it can be extended to many intensity-based fiber sensors. Relative variations in the buildup time of up to 55% at an increase of the hydrogen concentration from 0 to 10% are achieved with a resolution of better than 0.1%.

© 2004 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3510) Lasers and laser optics : Lasers, fiber
(280.3420) Remote sensing and sensors : Laser sensors

Citation
Yu. O. Barmenkov, A. Ortigosa-Blanch, A. Diez, J. L. Cruz, and M. V. Andrés, "Time-domain fiber laser hydrogen sensor," Opt. Lett. 29, 2461-2463 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-21-2461

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