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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 26 — Dec. 24, 2007
  • pp: 17645–17651

Light coupling between two parallel CO2-laser written long-period fiber gratings

Yunqi Liu, Kin Seng Chiang, Yun Jiang Rao, Zeng Ling Ran, and Tao Zhu  »View Author Affiliations

Optics Express, Vol. 15, Issue 26, pp. 17645-17651 (2007)

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We demonstrate experimentally the light coupling effects between two parallel CO2-laser written long-period fiber gratings. For gratings written in standard single-mode fibers, the coupling efficiency depends strongly on the fiber orientation with the strongest coupling obtained when the exposed sides of the fibers face each other, while for gratings written in boron-doped fibers, the coupling efficiency is independent of the fiber orientation. We achieve a peak coupling efficiency of ~86% with gratings written in boron-doped fibers by using a suitable surrounding refractive index and offset distance between the two gratings. Our results suggest the possibility of realizing efficient broadband all-fiber couplers with CO2-laser written long-period fiber gratings.

© 2007 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(350.2770) Other areas of optics : Gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 1, 2007
Revised Manuscript: December 2, 2007
Manuscript Accepted: December 4, 2007
Published: December 12, 2007

Yunqi Liu, Kin Seng Chiang, Yun Jiang Rao, Zeng Ling Ran, and Tao Zhu, "Light coupling between two parallel CO2-laser written long-period fiber gratings," Opt. Express 15, 17645-17651 (2007)

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