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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 19988–19995

Optically controllable side-polished fiber attenuator with photoresponsive liquid crystal overlay

Vincent K. S. Hsiao, Zhen Li, Zhe Chen, Peng-Chun Peng, and JieYuan Tang  »View Author Affiliations

Optics Express, Vol. 17, Issue 22, pp. 19988-19995 (2009)

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This study presents an optically controllable fiber-optic attenuator consisting of side-polished fiber (SPF) with a photoresponsive liquid crystal (LC) overlay operating in the telecommunication wavelength. Attenuation is controlled by a photochemical-induced phase transition of photoresponsive LC, which modulates the evanescent field leaked from the polished area. Before optical field illumination, the photoresponsive LCs are in the light-scattering state and attenuation is high. During photoirradiation, the formation of cis-azobenzene LC disrupts the nematic host and generates a light-transparent state in which the optical loss of the SPF attenuator decreases. The photoinduced tuning range is 15 dB at an environmental temperature of 45 °C, and a repeatable and reversible tuning is observed with a response time of less than 5 s. The proposed all-optical controllable attenuator has potential use as an optical signal modulator in an all-fiber telecommunication system.

© 2009 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(230.1150) Optical devices : All-optical devices
(230.4110) Optical devices : Modulators

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 17, 2009
Revised Manuscript: October 11, 2009
Manuscript Accepted: October 15, 2009
Published: October 19, 2009

Vincent K. S. Hsiao, Zhen Li, Zhe Chen, Peng-Chun Peng, and JieYuan Tang, "Optically controllable side-polished fiber attenuator with photoresponsive liquid crystal overlay," Opt. Express 17, 19988-19995 (2009)

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