Tunable channel-drop filters consisting of polymeric Bragg reflectors and a mode sorting asymmetric X-junction

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A tunable channel-drop filter as essential component for the wavelength-division-multiplexing optical communication system has been demonstrated, which is based on polymer waveguide Bragg reflectors. For an ordinary Bragg reflector, the filtered signal is reflected toward the input waveguide. Thus an external circulator is required to separate the filtered signal from the input port, though it increases the total footprint and cost. For this purpose, we employed dual Bragg reflectors and a mode sorting asymmetric X-junction. The Bragg reflector exhibited a maximum reflectivity of 94% for a 6-mm long grating, a 3-dB bandwidth of 0.39 nm and a 20-dB bandwidth of 2.6 nm. The mode sorting crosstalk in asymmetric X-junction was less than -20 dB, and linear wavelength tuning was achieved over 10 nm at the applied thermal power of 377 mW.
Publisher
OPTICAL SOC AMER
Issue Date
2015-06
Language
English
Article Type
Article
Keywords

THIN-FILM FILTERS; WAVE-GUIDE DEVICES; OPTICAL FILTERS; GRATINGS

Citation

OPTICS EXPRESS, v.23, no.13, pp.17223 - 17228

ISSN
1094-4087
DOI
10.1364/OE.23.017223
URI
http://hdl.handle.net/10203/204022
Appears in Collection
EE-Journal Papers(저널논문)
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