Title :
Design of long-period fiber gratings with fast-varying parameters
Author :
Ke, Hong ; Peng, Jihu ; Fan, Chongcheng
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A transfer matrix of an arbitrary period in a long-period fiber grating (LPFG) is derived. Cascade of such matrixes can easily be used to calculate the overall performance of LPFG, with fast variation in parameters (which is common practice in LPFGs) such as period length, strength, etc. Results show that the difference in transmittivity between our work and traditional coupled-mode theory becomes obvious, when abrupt change such as /spl pi/ phase-shift occurs. This method can be used in the mask design aiming at overall performance optimization through period-by-period pattern adjustment.
Keywords :
diffraction gratings; optical design techniques; optical fibre theory; optimisation; /spl pi/ phase-shift; arbitrary period; coupled-mode theory; fast-varying parameters; long-period fiber grating design; mask design; overall performance; performance optimization; period length; period-by-period pattern adjustment; transfer matrix; transmittivity; Bandwidth; Bragg gratings; Equations; Fiber gratings; Optical fiber devices; Optical fiber filters; Optical fiber sensors; Optical fiber theory; Optical fibers; Optimization;
Journal_Title :
Photonics Technology Letters, IEEE
