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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 23 — Nov. 17, 2003
  • pp: 3087–3092

Reduction of birefringence and polarization-dependent loss of long-period fiber gratings fabricated with a KrF excimer laser

S. T. Oh, W. T. Han, U. C. Paek, and Y. Chung  »View Author Affiliations


Optics Express, Vol. 11, Issue 23, pp. 3087-3092 (2003)
http://dx.doi.org/10.1364/OE.11.003087


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Abstract

We discuss the effect of UV laser exposure time, repetition rate, and heating by a heating coil on the resonance peak depth and polarization-dependent loss (PDL) of long-period fiber gratings (LPFGs). The LPFGs were fabricated with a KrF excimer laser and an amplitude mask. We observed an initial increase of the resonance peak depth and PDL as the UV exposure time was increased, which eventually decreased in response to over-coupling. With the total UV fluence kept constant, the peak depth continued to increase as the repetition rate was increased beyond 10 Hz, whereas the maximum PDL decreased when the repetition rate was higher than 17 Hz. This is believed to be a thermal effect caused by the rapid delivery of UV laser pulses. We observed a similar reduction of the maximum PDL from 1.35 to 0.25 dB when the fiber was heated by an adjacent heating coil.

© 2003 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(260.1440) Physical optics : Birefringence

ToC Category:
Research Papers

History
Original Manuscript: August 14, 2003
Revised Manuscript: October 31, 2003
Published: November 17, 2003

Citation
S. Oh, W. Han, U. Paek, and Y. Chung, "Reduction of Birefringence and Polarization- Dependent Loss of Long-Period Fiber Gratings Fabricated with a KrF Excimer Laser," Opt. Express 11, 3087-3092 (2003)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-11-23-3087


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