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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 5 — Mar. 10, 2014
  • pp: 5950–5961

All-optically reconfigurable and tunable fiber surface grating for in-fiber devices: a wideband tunable filter

Jianhui Yu, Yuqi Han, Hankai Huang, Haozi Li, Vincent K. S. Hsiao, Weiping Liu, Jieyuan Tang, Huihui Lu, Jun Zhang, Yunhan Luo, Yongchun Zhong, Zhigang Zang, and Zhe Chen  »View Author Affiliations

Optics Express, Vol. 22, Issue 5, pp. 5950-5961 (2014)

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A fiber surface grating (FSG) formed from a photosensitive liquid crystal hybrid (PLCH) film overlaid on a side-polished fiber (SPF) is studied and has been experimentally shown to be able to function as an all-optically reconfigurable and tunable fiber device. The device is all-optically configured to be a short period fiber surface grating (SPFSG) when a phase mask is used, and then reconfigured to be a long period FSG (LPFSG) when an amplitude mask is used. Experimental results show that both the short and long period FSGs can function as an optically tunable band-rejection filter and have different performances with different pump power and different configured period of the FSG. When configured as a SPFSG, the device can achieve a high extinction ratio (ER) of 21.5dB and a wideband tunability of 31nm are achieved. When configured as a LPFSG, the device can achieve an even higher ER of 23.4dB and a wider tunable bandwidth of 60nm. Besides these tunable performances of the device, its full width at half maximum (FWHM) can also be optically tuned. The reconfigurability and tunability of the fiber device open up possibilities for other all-optically programmable and tunable fiber devices.

© 2014 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(230.1150) Optical devices : All-optical devices
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Fiber Optics

Original Manuscript: December 23, 2013
Revised Manuscript: February 19, 2014
Manuscript Accepted: February 24, 2014
Published: March 6, 2014

Jianhui Yu, Yuqi Han, Hankai Huang, Haozi Li, Vincent K. S. Hsiao, Weiping Liu, Jieyuan Tang, Huihui Lu, Jun Zhang, Yunhan Luo, Yongchun Zhong, Zhigang Zang, and Zhe Chen, "All-optically reconfigurable and tunable fiber surface grating for in-fiber devices: a wideband tunable filter," Opt. Express 22, 5950-5961 (2014)

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