Title :
Novel flat multichannel filter based on strongly chirped sampled fiber Bragg grating
Author :
Chen, Xiang-Fei ; Fan, Chong-Cheng ; Luo, Y. ; Xie, Shi-Zhong ; Hu, S.
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A novel optical fiber filter based on a strongly chirped sampled Bragg grating is proposed for wavelength-division-multiplexing (WDM) system applications. It features in multiple equalized passbands with flat-top steep-edge nearly linear phase response and high transmittance. Refractive index modulation amplitude with Gaussian spatial profile is used within the samples, which contributes to the marked improvement of the filter performance. Furthermore, there are also multiple flat and equalized stopbands to be used as multichannel optical add/drop filters in a WDM system.
Keywords :
Bragg gratings; amplitude modulation; band-pass filters; chirp modulation; optical fibre communication; optical fibre dispersion; optical fibre filters; optical modulation; optical transmitters; refractive index; wavelength division multiplexing; Gaussian spatial profile; WDM system; equalized stopbands; fiber Bragg grating; filter performance; flat multichannel filter; flat-top steep-edge nearly linear phase response; high transmittance; multichannel optical add/drop filters; multiple equalized passbands; multiple flat stopbands; novel flat multichannel filter; optical fiber filter; refractive index modulation amplitude; strongly chirped sampled Bragg grating; strongly chirped sampled fiber Bragg grating; wavelength-division-multiplexing system applications; Amplitude modulation; Bragg gratings; Chirp modulation; Fiber gratings; Optical fiber filters; Optical filters; Optical modulation; Passband; Refractive index; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
