第21卷第4期 2013年4月
文章编号
1004-924X(2013)04-0889-06
光学精密工程
Optics and Precision Engineering
Vol. 21No. 4
Apr2013
基于双“g”字型光纤谐振环的全光纤三端口Interleaver
鲁怀伟*，郭开俊，罗冠炜
（兰州交通大学数学与物理学院，甘肃兰州730070）
摘要：为改善全光纤三端口Interleaver的输出特性，提出了种基于双"g"字型光纤谐振环的对称结构三端口全光纤In terleaver，该谐振环由一个一字型3X3单模光纤耦合器和两个2×2单模光纤耦合器组成双"8"字型作为输耦合器，而一个品字型3×3单模光纤耦合器作为输出耦合器。理论和实验分析了该波长交错器的输出特性，结果表明：与两级级联马禁-曾德尔干涉仪型(TCMZI)全光纤三端口Interleaver相比，其输出波形通带更加平坦，通带和阻带加宽，信道间功率旁瓣降低了约24dB。通过实验用光纤熔融拉锥法制作了该器件，结果显示实验结果与理论分析呐合得很好，实验
样品的信道间务瓣值小于一30dB，信道隔离度大于30dB，关键调：光纤光学；光纤辆合器；Interleaver；环形谱振环
中图分类号：TN253
文献标识码：A
doi;10.3788/OPE,20132104,0889
All-fiberthree-channelinterleaverbasedondual-8-shapedringresonator
LU Huai-wei',WU Kai-jun,LUO Guan-wei
(Schoolof Mathematics andPhysics,LanzhouJiaotongUniersity,Lanzhou730o70,China)
CorrespondingauthorE-mail;luhw@mail.lzjtu.cn
Abstract: In order to improve the transmission performance of all-fiber three-channel interleavers, an all-fiber three-channel interleaver was developed by using a new configuration of dual-8-shaped ring re sonator. The ring was composed of a planar 3 X3 single mode fiber coupler and two 2X 2 fiber couplers and was used as an input device. Furthermore, a regular triangle 3X 3 fiber coupler was used as out-put device. The propagation properties of the three-channel interleaver were studied experimentally and theoretically. Obtained result indicates that the sidelobe level of charinel of the proposed device is reduced by more than 24 dB and the crosstalk characteristics, channel isolation, the bandwidth of passband/stopband, the rolloff in transition band and the coupling-coefficient tolerance have been im-proved greatly in comparison with that of the convention all-fiber three-channel interleaver based on a two-stage cascaded Mach-Zehnder interferometer(TCMZI). This kind of interleaver was fabricated with a fused biconical taper technics in an experiment, The experimental results are in good agreement with the analytical ones and it shows that the measured sidelobe level is about —3o dB and the channel isolation is higher than 3o dB.
Key words: fiber optics; optical fiber coupler; optical interleaver; ring resonator
收稿日期：2012-12-28；修订日期：2013-02-05.
基金项目：国家自然科学基金资助项目（No.10972095)；甘肃省自然科学基金资助项目（No.1208RJZA256)