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학술지 Second-order All-fiber Comb Filter based on Polarization-diversity Loop Configuration
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저자
이용욱, 김현탁, 이용완
발행일
200803
출처
Optics Express, v.16 no.6, pp.3871-3876
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.16.003871
협약과제
08MB3100, 전기적 점프(Current Jump)를 이용한 신소자 기술, 김현탁
초록
By concatenating three birefringence loops in series, a second-order all-fiber comb filter based on a polarization-diversity loop configuration is newly proposed. The proposed filter consists of one polarization beam splitter, polarization-maintaining fibers, and two halfwave plates. The effect of a second-order structure of polarization-maintaining fiber loops on a bandwidth of the filter passband was theoretically analyzed and experimentally demonstrated. Transmission output of the second-order filter (flat-top and narrow-band transmission spectra) could be obtained by adjusting two half-wave plates. 1 and 3 dB bandwidths of the proposed filter in flat-top and narrow-band operations were greater by ~102.9 and 44.3 % and smaller by ~47.9 and 47.1 % than those of a conventional Sagnac birefringence filter, respectively. © 2008 Optical Society of America.
KSP 제안 키워드
All-fiber, Comb filter, Flat-Top, Half-wave, Narrow band, Polarization beam splitter(PBS), Polarization-diversity loop configuration, Polarization-maintaining fiber, Transmission spectra, order structure, second-order filter