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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 14 — May. 10, 2013
  • pp: 3318–3323

Spectra analysis of nonuniform FBG-based acousto-optic modulator by using Fourier mode coupling theory

Chao Liu, Li Pei, Zhuoxuan Li, Tigang Ning, Shaowei Yu, and Zexin Kang  »View Author Affiliations


Applied Optics, Vol. 52, Issue 14, pp. 3318-3323 (2013)
http://dx.doi.org/10.1364/AO.52.003318


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Abstract

Fourier mode coupling theory was first employed in the spectral analysis of several nonuniform fiber Bragg grating (FBG)-based acousto-optic modulators (NU-FBG-AOMs) with the effects of Gaussian-apodization (GA), phase shift (PS), and linear chirp (LC). Because of the accuracy and simplicity of the algorithm applied in this model, the modulation performances of these modulators can be acquired effectively and efficiently. Based on the model, the reflected spectra of these modulators were simulated under various acoustic frequencies and acoustically induced strains. The simulation results of the GA-FBG-AOM and PS-FBG-AOM showed that the wavelength spacing between the primary reflection peak and the secondary reflection peak is proportional to the acoustic frequency, and the reflectivity of reflection peaks depends on the acoustically induced strains. But for the LC-FBG-AOM, the wavelength spacing between the neighboring reflection peaks increased linearly and inversely with the acoustic frequency, and the extinction ratio of each peak relates to the acoustically induced strain. These numerical analysis results, which were effectively used in the designs and fabrications of these NU-FBG-AOMs, can broaden the AOM-based application scope and shed light on the performance optimization of optical wavelength-division multiplex system.

© 2013 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(230.1040) Optical devices : Acousto-optical devices
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Optical Devices

History
Original Manuscript: December 19, 2012
Revised Manuscript: March 20, 2013
Manuscript Accepted: April 3, 2013
Published: May 7, 2013

Citation
Chao Liu, Li Pei, Zhuoxuan Li, Tigang Ning, Shaowei Yu, and Zexin Kang, "Spectra analysis of nonuniform FBG-based acousto-optic modulator by using Fourier mode coupling theory," Appl. Opt. 52, 3318-3323 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-14-3318

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