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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 12 — Jun. 15, 2010
  • pp: 2043–2045

Optical fiber tip acoustic resonator for hydrogen sensing

Cheng Ma and Anbo Wang  »View Author Affiliations

Optics Letters, Vol. 35, Issue 12, pp. 2043-2045 (2010)

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A microscale acoustic resonator fabricated on a standard single-mode fiber tip was demonstrated as a hydrogen sensor. The fabrication of the resonator involved standard fiber cleaving and splicing, radio frequency sputtering, focused-ion-beam patterning and deposition, and wet etching. A submicrometer layer of platinum was coated on the vibration arms of the resonator serving as a catalytic heater upon hydrogen exposure. The heat locally raised the resonator temperature, which led to an acoustic resonance frequency shift. The sensor’s resonance frequency at 1.7 MHz shifted 1170.4 Hz upon exposure to 1% hydrogen concentration; the sensitivity of the sensor was estimated to be better than 0.1%.

© 2010 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(220.4000) Optical design and fabrication : Microstructure fabrication
(280.1545) Remote sensing and sensors : Chemical analysis
(230.4685) Optical devices : Optical microelectromechanical devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 22, 2010
Revised Manuscript: April 29, 2010
Manuscript Accepted: May 11, 2010
Published: June 9, 2010

Cheng Ma and Anbo Wang, "Optical fiber tip acoustic resonator for hydrogen sensing," Opt. Lett. 35, 2043-2045 (2010)

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