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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 30 — Oct. 20, 2012
  • pp: 7314–7318

Research on FBG-based longitudinal-acousto-optic modulator with Fourier mode coupling method

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

Applied Optics, Vol. 51, Issue 30, pp. 7314-7318 (2012)

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Fourier mode coupling model was first applied to achieve the spectra property of a fiber Bragg grating (FBG)-based longitudinal-acousto-optic modulator. Compared with traditional analysis algorithms, such as the transfer matrix method, the Fourier mode coupling model could improve the computing efficiency up to 100 times with a guarantee of accuracy. In this paper, based on the theoretical analysis of this model, the spectra characteristics of the modulator in different frequencies and acoustically induced strains were numerically simulated. In the experiment, a uniform FBG was modulated by acoustic wave (AW) at 12 different frequencies. In particular, the modulator responses at 563 and 885.5 KHz with three different lead zirconate titanate (PZT) loads applied were plotted for illustration, and the linear fitting of experimental data demonstrated a good match with the simulation result. The acoustic excitation of the longitudinal wave is obtained using a conic silica horn attached to the surface of a shear-mode PZT plate paralleled to the fiber axis. This way of generating longitudinal AW with a transversal PZT may shed light on the optimal structural design for the FBG-based longitudinal-acousto-optic modulator.

© 2012 Optical Society of America

OCIS Codes
(230.1040) Optical devices : Acousto-optical devices
(300.6170) Spectroscopy : Spectra
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 3, 2012
Revised Manuscript: September 11, 2012
Manuscript Accepted: September 19, 2012
Published: October 16, 2012

Zhuoxuan Li, Li Pei, Chao Liu, Tigang Ning, and Shaowei Yu, "Research on FBG-based longitudinal-acousto-optic modulator with Fourier mode coupling method," Appl. Opt. 51, 7314-7318 (2012)

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