Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4387
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Title: Structural long period gratings made by drilling micro-holes in photonic crystal fibers with a femtosecond infrared laser
Authors: Liu, S
Jin, L
Jin, W 
Wang, D 
Liao, C
Wang, Y
Issue Date: 15-Mar-2010
Source: Optics express, 15 Mar. 2010, v. 18, no. 6, p. 5496-5503
Abstract: 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.
Keywords: Crystal whiskers
Fibers
Infrared devices
Infrared lasers
Laser cladding
Photonic crystals
Resonance
Publisher: Optical Society of America
Journal: Optics express 
EISSN: 1094-4087
DOI: 10.1364/OE.18.005496
Rights: © 2010 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-6-5496. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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