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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 6 — Mar. 15, 2010
  • pp: 5496–5503

Structural long period gratings made by drilling micro-holes in photonic crystal fibers with a femtosecond infrared laser

Shujing Liu, Long Jin, Wei Jin, Dongning Wang, Changrui Liao, and Ying Wang  »View Author Affiliations

Optics Express, Vol. 18, Issue 6, pp. 5496-5503 (2010)

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We present a new method for fabricating structural long-period gratings (LPGs) in photonic-crystal fibers (PCFs). The method is based on periodically drilling holes into the PCF cladding along the length of the fiber by use of a focused femtosecond infrared laser. A very short LPG with only 9 periods and a grating length of < 4 mm exhibited resonance strength of over 20 dB and a polarization dependent loss of 25 dB. The high resonance strength is attributed to the strong modulated mode-field profile caused by the significant perturbation of the fiber geometry. The mechanism of LPG formation is discussed based on coupled local-mode theory.

© 2010 OSA

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(220.4000) Optical design and fabrication : Microstructure fabrication
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Photonic Crystal Fibers

Original Manuscript: November 10, 2009
Revised Manuscript: December 25, 2009
Manuscript Accepted: January 4, 2010
Published: March 3, 2010

Shujing Liu, Long Jin, Wei Jin, Dongning Wang, Changrui Liao, and Ying Wang, "Structural long period gratings made by drilling micro-holes in photonic crystal fibers with a femtosecond infrared laser," Opt. Express 18, 5496-5503 (2010)

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