A novel sampled Bragg grating comb filter with a ladder chirped structure

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 amplitu...

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Bibliographic Details
Main Authors: Xing-hua Tu, Zuo-wei Yin, Yue-chun Shi, Xiang-fei Chen
Format: Conference Proceeding
Language:English
Subjects:
Amplitude modulation
Bragg gratings
Channel spacing
Chirp modulation
comb filter
ladder chirp
Optical filters
Optical modulation
Optical refraction
Passband
Refractive index
sampled Bragg grating
Wavelength division multiplexing
wavelength-division-multiplexing(WDM)
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Summary: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.
ISSN:2163-0771
DOI:10.1109/APCC.2009.5375571