Title :
A novel sampled Bragg grating comb filter with a ladder chirped structure
Author :
Tu, Xing-hua ; Yin, Zuo-wei ; Shi, Yue-chun ; Chen, Xiang-Fei
Author_Institution :
Microfluidics & Opt. Technol. Res. Center, Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
Based on a sampled fiber Bragg grating, a novel approach to obtain high channel-count comb filters is proposed for wavelength-division-multiplexing (WDM) system in this letter. There is a non-continuous linear chirped structure like a ladder in grating period. And refractive index modulation amplitude with Hamming spatial profile is used within the samples. The 26-channel comb filter with channel spacing of 50 GHz is then fabricated, it features in multiple equalized passbands with flat-top steep-edge and high transmittance which will benefit as multi-channel optical add/drop filters in WDM system.
Keywords :
Bragg gratings; optical fibre communication; refractive index; wavelength division multiplexing; Bragg grating comb filter; Hamming spatial profile; fiber Bragg grating; frequency 50 GHz; high channel-count comb filters; ladder chirped structure; non-continuous linear chirped structure; refractive index modulation; wavelength-division-multiplexing system; Amplitude modulation; Bragg gratings; Channel spacing; Chirp modulation; Optical filters; Optical modulation; Optical refraction; Passband; Refractive index; Wavelength division multiplexing; comb filter; ladder chirp; sampled Bragg grating; wavelength-division-multiplexing(WDM);
Conference_Titel :
Communications, 2009. APCC 2009. 15th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4784-8
Electronic_ISBN :
978-1-4244-4785-5
DOI :
10.1109/APCC.2009.5375571
