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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 24 — Dec. 15, 2010
  • pp: 4187–4189

Fiber Sagnac π-shifted interferometer for a polarization-independent PMNT high-speed electro-optic switch

Qing Ye, Lei Qiao, Jiulin Gan, Haiwen Cai, and Ronghui Qu  »View Author Affiliations

Optics Letters, Vol. 35, Issue 24, pp. 4187-4189 (2010)

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We propose and analyze experimentally a high-speed polarization-independent lead magnesium niobate titanate (PMNT) electro-optic switch using a π-shifted fiber Sagnac interferometer (FSI). In the proposed switch, the PMNT high-speed electro-optic ceramic is used as a phase retarder for two counterpropagating waves, which can switch the energy between the reflection and transmission ports of the FSI. Because of an initial π shift introduced into the FSI by actively adjusting the polarization controller, the power response of the switch is independent of the polarization orientation of the incident light, which induces the polarization-independent characteristic of the switch. An optical switch with cross talk lower than 25 dB and a switching time of less than 200 ns is experimentally investigated. The insertion loss and electric hysteresis property are also demonstrated. Finally, a scheme to form the n × n switch matrix is proposed.

© 2010 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2310) Fiber optics and optical communications : Fiber optics
(230.5440) Optical devices : Polarization-selective devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 21, 2010
Manuscript Accepted: November 4, 2010
Published: December 14, 2010

Qing Ye, Lei Qiao, Jiulin Gan, Haiwen Cai, and Ronghui Qu, "Fiber Sagnac π-shifted interferometer for a polarization-independent PMNT high-speed electro-optic switch," Opt. Lett. 35, 4187-4189 (2010)

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