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Optics Letters

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  • Vol. 28, Iss. 24 — Dec. 15, 2003
  • pp: 2467–2469

Deep-notch, ultracompact long-period grating in a large-mode-area photonic crystal fiber

Yinian Zhu, Ping Shum, Joo-Hin Chong, M. K. Rao, and Chao Lu  »View Author Affiliations


Optics Letters, Vol. 28, Issue 24, pp. 2467-2469 (2003)
http://dx.doi.org/10.1364/OL.28.002467


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Abstract

An extremely short long-period grating (LPG) with strong resonance has been developed in a large-mode-area photonic crystal fiber (PCF) by use of the heat source of a CO2 laser. We believe that such a LPG in pure silica PCF is the first example to be obtained with the point-by-point technique. The fabrication method is simple and repeatable. The resulting LPG has 8 periods, written by a CO2 laser, within a 2.8-mm length of fiber, which yields a deep notch of core–cladding mode coupling of -31.5 dB at the telecommunication wavelength of 1529.2 nm, with a FWHM of ~0.7 nm. The principal advantages of this LPG are that it is practical, cost effective, and compact.

© 2003 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2310) Fiber optics and optical communications : Fiber optics
(230.4000) Optical devices : Microstructure fabrication

Citation
Yinian Zhu, Ping Shum, Joo-Hin Chong, M. K. Rao, and Chao Lu, "Deep-notch, ultracompact long-period grating in a large-mode-area photonic crystal fiber," Opt. Lett. 28, 2467-2469 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-24-2467


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