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Proceedings Paper

Analysis of long-period fiber grating with fast-varying parameters and its optimization by genetic algorithm
Author(s): Hong Ke; Jihu M. Peng; Chongcheng Fan
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Paper Abstract

A transfer matrix of an arbitrary period in a long-period fiber grating (LPFG) is derived. Cascade of such matrices can be used easily to calculate the overall performance of LPFG with fast variation in parameters (which is common practice in LPFGs) such as period length, strength, etc. more precisely. Results show that the difference in transmittivity between our work and traditional coupled-mode theory becomes obvious when abrupt change such as (pi) phase-shift occurs. This method can be used in the mask design aiming at overall performance optimization through period-by-period pattern adjustment. Finally, a genetic algorithm is used to optimize the LPFG period by period.

Paper Details

Date Published: 19 October 2001
PDF: 8 pages
Proc. SPIE 4579, Optical Fiber and Planar Waveguide Technology, (19 October 2001); doi: 10.1117/12.444905
Show Author Affiliations
Hong Ke, Tsinghua Univ. (China)
Jihu M. Peng, Tsinghua Univ. (China)
Chongcheng Fan, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 4579:
Optical Fiber and Planar Waveguide Technology
Shuisheng Jian; Yanming Liu, Editor(s)

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