Title :
Periodically chirped sampled fiber Bragg gratings for multichannel comb filters
Author :
Zou, Xi-Hua ; Pan, Wei ; Luo, Bin ; Qin, Zhang-Miao ; Wang, Meng-Yao ; Zhang, Wei-Li
Author_Institution :
Sch. of Inf. Sci. & Technol., Southwest Jiaotong Univ., Sichuan
fDate :
6/1/2006 12:00:00 AM
Abstract :
Periodically chirped sampled fiber Bragg gratings (PC-SFBGs) are proposed as multichannel comb filters. A PC-SFBG consists of many chirp periods corresponding to the periodic chirp effect. With the same chirp coefficient released for a linearly chirped SFBG (LC-SFBG), the spectral self-imaging phenomenon is also observed in the PC-SFBG. Compared with a uniform SFBG, the PC-SFBG exhibits a narrower channel spacing and a similar group-delay characteristic in the reflection bands. Meanwhile, the PC-SFBG ensures a more accurate phase-shift condition (or a better tolerance on the chirp coefficient) and higher peak reflectivities than the LC-SFBG
Keywords :
Bragg gratings; Talbot effect; channel spacing; chirp modulation; comb filters; optical fibre filters; reflectivity; channel spacing; chirp coefficient; group-delay characteristic; linearly chirped SFBG; multichannel comb filters; peak reflectivity; periodically chirped sampled fiber Bragg gratings; spectral self-imaging; Chirp modulation; Communication networks; Gratings; Optical fiber devices; Optical fibers; Optical filters; Optical refraction; Phase modulation; Reflectivity; Sampling methods; Gratings; optical fiber devices; optical filter; wavelength-division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.877349
