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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 4 — Feb. 1, 2011
  • pp: 562–570

Polarization-independent tunable spectral slicing filter in Ti:LiNbO3

Renato C. Rabelo, Ohannes Eknoyan, and Henry F. Taylor  »View Author Affiliations


Applied Optics, Vol. 50, Issue 4, pp. 562-570 (2011)
http://dx.doi.org/10.1364/AO.50.000562


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Abstract

A two-port polarization-independent tunable spectral slicing filter at the 1530 nm wavelength regime is presented. The design utilizes an asymmetric interferometer with a sparse index grating along its arms. The sparse grating makes it possible to select equally spaced frequency channels from an incident WDM signal and to place nulls between them to coincide with the signal comb frequency. The number of selected channels and nulls between them depends on the number of coupling regions used in the sparse grating. The free spectral range depends on the spacing between the coupling regions. The Z-transform method is used to synthesize the filter and determine the spectral response. The operation of a device with six coupling regions is demonstrated, and good agreement with theoretical predictions is obtained. A 3 dB bandwidth of ∼1 nm and thermal tuning over a range of ∼13 nm are measured.

© 2011 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
(130.3730) Integrated optics : Lithium niobate
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

History
Original Manuscript: September 24, 2010
Revised Manuscript: December 8, 2010
Manuscript Accepted: December 13, 2010
Published: January 31, 2011

Citation
Renato C. Rabelo, Ohannes Eknoyan, and Henry F. Taylor, "Polarization-independent tunable spectral slicing filter in Ti:LiNbO3," Appl. Opt. 50, 562-570 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-4-562

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