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Optical Engineering • Open Access

Optimal design of single resonant and ultrabroadband long-period fiber grating filters
Author(s): Cheng-Ling Lee; Pin Han

Paper Abstract

We propose a spectral flat-top, single resonant, and ultrabroadband-more than 180 nm in a -20-dB bandwidth-long-period fiber grating (LPG) filter. The ultrabroadband LPG is based on a thin cladding layer LPG synthesized by the Lagrange multiplier optimization (LMO) algorithm. As the bandwidth and resonant spectra cover a very wide band, both material dispersion and waveguide dispersion were included in the calculations of the LMO method. To the best of our knowledge, the bandwidth of the designed flat-top LPG filter in the -20-dB coupling is the broadest currently existing in the literature. Such designed LPG devices can be very useful for a variety of applications in broadband optical communication systems.

Paper Details

Date Published: 1 August 2009
PDF: 3 pages
Opt. Eng. 48(8) 080501 doi: 10.1117/1.3194285
Published in: Optical Engineering Volume 48, Issue 8
Show Author Affiliations
Cheng-Ling Lee, National United Univ. (Taiwan)
Pin Han, National Chung-Hsing Univ. (Taiwan)


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