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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 36, Iss. 19 — Oct. 1, 2011
  • pp: 3756–3758

Compact interrogator for fiber optic Bragg sensors based on an acousto-optic filter formed by photonic crystal rows of air holes

Andrei V. Tsarev, Francesco De Leonardis, and Vittorio M. N. Passaro  »View Author Affiliations


Optics Letters, Vol. 36, Issue 19, pp. 3756-3758 (2011)
http://dx.doi.org/10.1364/OL.36.003756


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Abstract

Fiber optic sensors are typically used with expensive tunable lasers or optical spectrum analyzers for wavelength interrogation. We propose to replace the tunable laser by a broadband optical source incorporated with a novel thin linewidth acousto-optic tunable filter. It utilizes optical beam expanders constituted by photonic crystal rows of air holes in LiNbO 3 waveguide. A new design is numerically studied for a short structure (with 32 photonic crystal rows) by a two-dimensional finite-difference time-domain method. Extrapolation of these results to larger structure sizes (about 1 cm ) demonstrates the possibility to develop compact interrogators with 0.4 pm wavelength resolution and 40 nm tunable range around 1550 nm .

© 2011 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(130.3730) Integrated optics : Lithium niobate
(230.1040) Optical devices : Acousto-optical devices
(230.7370) Optical devices : Waveguides
(050.6624) Diffraction and gratings : Subwavelength structures
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

History
Original Manuscript: May 3, 2011
Revised Manuscript: July 11, 2011
Manuscript Accepted: August 26, 2011
Published: September 20, 2011

Citation
Andrei V. Tsarev, Francesco De Leonardis, and Vittorio M. N. Passaro, "Compact interrogator for fiber optic Bragg sensors based on an acousto-optic filter formed by photonic crystal rows of air holes," Opt. Lett. 36, 3756-3758 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-19-3756

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