Bragg grating with new sampling structure for compensating dispersion and polarization mode dispersion
Title：
Bragg grating with new sampling structure for compensating dispersion and polarization mode dispersion
Application Number：
 02103383
Application Date：
 2002/01/25
Announcement Date：
 2003/08/06
Pub. Date：
Publication Number：
 1434583
Announcement Number：
 1201513
Grant Date：
 2005-5-11
Granted Pub. Date：
 2005-5-11
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H04B 10/12, G02F 1/35
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Feng Jia, Chen Xiangfei, Li Xuhui
Key Words：
 Bragg grating, new sampling structure, compensating dispersion, polarization mode dispersion
Abstract：
 This invention provides a reflective Bragg grating used in dispersion compensatino in optical fiber communication which has effective refractive index perturbation expressed indiagram (1) in which z is a coordinate along the grating direction, A is period of grating beginning, delta ndc is a mean value in a grating period of effective refractive index perturbation, delta nac is the amplitude of that fast variable component is an added phase item, in which F(z) is a new sample structure with non-linear type II chirp display in diagram(2), therefore, this invented grating can provide various group time delay respoonse spectrums to compensate the dispersion in a certain reflecting band independent of chirp (type I) caused by the variation along z by delta ndc or diameter, and F(z) sample period is far more larger than the grating period.
Claim：
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