Second-order all-fiber comb filter based on polarization-diversity loop configuration

被引：21
作者：
Lee, Yong Wook [1 ]
Kim, Hyun-Tak [2 ]
Lee, Yong Wan [3 ]
机构：
[1] Pukyong Natl Univ, Sch Elect & Control Engn, Pusan 608739, South Korea
[2] Elect & Telecommun Res Inst, IT Components & Mat Res Div, Taejon 305350, South Korea
[3] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
来源：
OPTICS EXPRESS | 2008年 / 16卷 / 06期
关键词：
D O I：
10.1364/OE.16.003871
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 similar to 102.9 and 44.3 % and smaller by similar to 47.9 and 47.1 % than those of a conventional Sagnac birefringence filter, respectively. (C) 2008 Optical Society of America.
引用
收藏
页码：3871 / 3876
页数：6
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