单偏振双芯光子带隙光纤定向耦合器

提出了一种基于双芯光子带隙光纤(PBF)的单偏振(SP)定向耦合器，利用全矢量有限元方法(FEM)对其耦合特性进行了研究。结果表明：通过适当调整纤芯间微孔的大小及掺杂折射率可在耦合器获得SP特性；而纤芯间微孔椭圆率的变化并不会对其SP特性造成干扰，耦合器具有较高的结构参数容错性；通过优化参数，最终获得了一种长度仅为0.403 mm的SP定向耦合器。该耦合器在全保偏PBF(PM-PBF)谐振腔应用中，能同时起到分束器及起偏器的作用，可以破坏次本征偏振态(ESOP)的谐振条件,有效抑制次ESOP的传输。这种具有较短长度的SP定向耦合器模场可与之前提出的PM-PBF的模场相匹配，有利于搭建起全PM-PBF谐振腔，这对抑制谐振式光纤陀螺(RFOG)热致偏振串扰噪声、提高RFOG的长期稳定性具有重要意义。

Abstract

A single-polarization (SP) directional coupler based on dual-core photonic bandgap fiber (PBF) is proposed, and the coupling properties of the coupler are studied numerically using the full vector finite element method (FEM). Results show that by appropriately adjusting the size of the holes between the cores and the refractive index of doping, the SP property can be obtained in a coupler; however, the ellipticity of the hole between two cores has no effect on the SP property, which means that the coupler has high structure parameter error tolerance; an SP directional coupler with length of 0.403 mm is obtained by optimizing the parameters. In the application of the all polarization-maintaining PBF (PM-PBF) based resonant cavities, the coupler can serve as a beam splitter and a polarizer at the same time, break the resonant condition of secondary eigenstate of polarization (ESOP) and effectively inhibit its transmission. The mode field of SP coupler with short length matches with the PM-PBF proposed in former study, which is beneficial to the establishment of an all PM-PBF resonant cavities, and therefore has great significance in reducing the thermally induced polarization crosstalk noise of resonator fiber-optic gyroscopes (RFOG) and improving the long-term stability of RFOG.

参考文献

[1] Chow W W, Gea-Banaciloche J, Pedrotti L M. The ring laser gyro[J]. Rev Mod Phys, 1985, 57: 61-103.

[2] 于秀娟, 廖延彪, 张敏, 等. 谐振式空心光子带隙光纤陀螺中的光克尔效应[J]. 中国激光, 2008, 35(3): 430-435.

Yu Xiujuan, Liao Yanbiao, Zhang Min, et al. Kerr effect in an optical passive ring-resonator gyro using a hollow-core photonic band-gap fiber[J]. Chinese J Lasers, 2008, 35(3): 430-435.

[3] Iwatsuki K, Hotate K, Higashiguchi M. Eigenstate of polarization in a fiber ring resonator and its effect in an optical passive ring-resonator gyro[J]. Appl Opt, 1986, 25(15): 2606-2612.

[4] Ma H, Chen Z, Yang Z, et al. Polarization-induced noise in resonator fiber optic gyro[J]. Appl Opt, 2012, 51(28): 6708-6717.

[5] Iwatsuki K, Hotate K, Higashiguchi M. Kerr effect in an optical passive ring-resonator gyro[J]. J Lightwave Technol, 1986, 4(6): 645-651.

[6] Iwatsu ki K, Hotate K, Higashiguchi M. Effect of Rayleigh backscattering in an optical passive ring-resonator gyro[J]. Appl Opt, 1984, 23(21): 3916-3924.

[7] Ma H L, Chen Z, Jin Z H. Single-polarization coupler based on air-core photonic bandgap fibers and implications for resonant fiber optic gyro[J]. J Lightwave Technol, 2014, 32(1): 46-54.

[8] Takiguchi K, Hotate K. Evaluation of the output error in an optical passive ring-resonator gyro with a 90° polarization-axis rotation in the polarization-maintaining fiber resonator[J]. IEEE Photon Technol Lett, 1991, 3(1): 88-89.

[9] Wang X, He Z, Hotate K. Reduction of polarization fluctuation induced drift in resonator fiber optic gyro by a resonator with twin 90° polarization axis rotated splices[J]. Opt Express, 2010, 18(2): 1677-1683.

[10] Ma H L, Yu X H, Jin Z H. Reduction of polarization-fluctuation induced drift in resonator fiber optic gyro by a resonator integrating in-line polarizer[J]. Opt Lett, 2012, 37(16): 3342-3344.

[11] Yan Y C, Ma H L, Jin Z H. Reducing polarization-fluctuation induced drift in resonant fiber optic gyro by using single-polarization fiber[J]. Opt Express, 2015, 23(3): 2002-2009.

[12] 宋镜明, 孙康, 徐小斌. 空芯光子带隙光纤散射损耗特性及结构优化研究[J]. 中国激光, 2015, 42(11): 1105003.

Song Jingming, Sun Kang, Xu Xiaobin. Scattering loss analysis and structure optimization of hollow-core photonic bandgap fibers[J]. Chinese J Lasers, 2015, 42(11): 1105003.

[13] 黄崇德, 陈迪俊, 蔡海文, 等. 空芯光子晶体光纤吸收池的激光稳频技术[J]. 中国激光, 2014, 41(8): 0802006.

Huang Chongde, Chen Dijun, Cai Haiwen, et al. Laser frequency stabilization technology based on hollow-core photonics crystal fiber gas cell[J]. Chinese J Lasers, 2014, 41(8): 0802006.

[14] Kim H K, Digonnet M J F, Kino G S. Air-core photonic bandgap fiber-optic gyroscope[J]. J Lightwave Technol, 2006, 24(8): 3169-3174.

[15] Sanders G A, Strandjord L K, Qiu Tiequn. Hollow core fiber optic ring resonator for rotation sensing[C]. Optical Fiber Sensors, 2006, ME: ME6.

[16] Terrel M A, Michel Digonnet J F, Fan S H. Resonant fiber optic gyroscope using an air-core fiber[J]. J Lightwave Technol, 2012, 30(7): 931-937.

[17] 冯丽爽, 邓学文, 任小元, 等. 基于微光学结构的空芯光子带隙光纤环形谐振腔研究[J]. 光学学报, 2012, 32(8): 0806002.

Feng Lishuang, Deng Xuewen, Ren Xiaoyuan, et al. Researcher on hollow core photonic bandgap fiber ring resonator based on micro-optics structure[J]. Acta Optica Sinica, 2012, 32(8): 0806002.

[18] 李绪友, 许振龙, 杨汉瑞, 等. 保偏空芯带隙光子晶体光纤温度特性研究[J]. 中国激光, 2016, 43(4): 0405003.

Li Xuyou, Xu Zhenlong, Yang Hanrui, et al. Analysis of thermal properties in a polarization-maintaining air-core photonic bandgap fiber[J]. Chinese J Lasers, 2016, 43(4): 0405003.

[19] Rahman B M A, Kejalakshmy N, Agrawal A, et al. Characterizations of photonic crystal fibers by using a full-vectorial finite element method[C]. The International Society for Optical Engineering, 2006, 6369: 636904.

[20] 李绪友, 许振龙, 刘攀, 等. 短长度超高消光比双芯光子晶体光纤偏振分束器[J]. 中国激光, 2015, 42(6): 0605006.

Li Xuyou, Xu Zhenlong, Liu Pan, et al. Short polarization splitter based on dual-core photonic crystal fiber with ultra-high extinction ratio[J]. Chinese J Lasers, 2015, 42(6): 0605006.

[21] Wang Z, Kai G, Liu Y, et al. Coupling and decoupling of dual-core photonic bandgap fibers[J]. Opt Lett, 2005, 30(19): 2542-2544.

[22] Wang Z, Taru T, Birks T A, et al. Coupling in dual-core photonic bandgap fibers: Theory and experiment[J]. Opt Express, 2007, 15(8): 4795-4083.

[23] Désévédavy F, Renversez G, Troles J, et al. Chalcogenide glass hollow core photonic crystal fibers[J]. Opt Materials, 2010, 32(11): 1532-1539.

李绪友, 许振龙, 凌卫伟, 刘攀, 夏琳琳, 杨汉瑞. 单偏振双芯光子带隙光纤定向耦合器[J]. 中国激光, 2016, 43(9): 0906002. Li Xuyou, Xu Zhenlong, Ling Weiwei, Liu Pan, Xia Linlin, Yang Hanrui. Single-Polarization Directional Coupler Based on Dual-Core Photonic Bandgap Fiber[J]. Chinese Journal of Lasers, 2016, 43(9): 0906002.

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