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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 23 — Dec. 1, 2010
  • pp: 4033–4035

Compact acousto-optic filter with beam expanders constituted by photonic crystal rows of airholes

Andrei V. Tsarev  »View Author Affiliations


Optics Letters, Vol. 35, Issue 23, pp. 4033-4035 (2010)
http://dx.doi.org/10.1364/OL.35.004033


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Abstract

A compact acousto-optic (AO) filter with multireflector (MR) beam expanders constituted by 32 photonic crystal rows of airholes in LiNbO 3 waveguide has been proposed and numerically studied by the two-dimensional finite-difference–time-domain method. The diameter and position of every row of holes are gradually varied along MR beam expanders in order to provide high efficiency and good sidelobe suppression. Device sizes are 70 μm × 150 μm , with an FWHM bandwidth of 4.4 nm , a tuning range of 110 nm , internal loss of 3 dB , and sidelobes of 20 dB , thus providing a unique value of 0.6 μm 2 for the product FWHM bandwidth by an AO length. It is intended for use in fiber optics telecommunications and sensing.

© 2010 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: August 19, 2010
Revised Manuscript: November 3, 2010
Manuscript Accepted: November 3, 2010
Published: November 24, 2010

Citation
Andrei V. Tsarev, "Compact acousto-optic filter with beam expanders constituted by photonic crystal rows of airholes," Opt. Lett. 35, 4033-4035 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-23-4033


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