光子晶体偏振分束器的设计与性能分析
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摘要
设计了一种基于定向耦合结构的光子晶体偏振分束器。该分束器由两个单模波导构成,通过调节两个单模波导的宽度可以改变耦合长度。利用时域有限差分法进行仿真分析,结果表明,在波长1550nm下TE和TM两种偏振模可以分束,透射率都达到90%以上,消光比分别达到22.4dB和18.2dB。该光子晶体偏振分束器的尺寸为25.8μm×13μm。
A photonic crystal polarizing beam splitter based on directional coupling structure is proposed.The beam splitter consists of two single-mode waveguides.By adjusting the width of the two single-mode waveguides,the coupling length can be changed.The splitter is simulated and analyzed by using finite-difference time-domain method.The results show that at the wavelength of 1550 nm,both TE and TM polarizations achieve mode split.The transmissivities of TE and TM modes both exceed 90% and the extinction ratios reach 22.4dB and 18.2dB respectively.The size of the device is only 25.8μm×13μm.
A photonic crystal polarizing beam splitter based on directional coupling structure is proposed.The beam splitter consists of two single-mode waveguides.By adjusting the width of the two single-mode waveguides,the coupling length can be changed.The splitter is simulated and analyzed by using finite-difference time-domain method.The results show that at the wavelength of 1550 nm,both TE and TM polarizations achieve mode split.The transmissivities of TE and TM modes both exceed 90% and the extinction ratios reach 22.4dB and 18.2dB respectively.The size of the device is only 25.8μm×13μm.
引文
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[8]Wu Liheng,Wang Minghong.Reflecting splitter based on photonic crystal U-shaped resonators[J].Laser&Optoelectronics Progress,2016,53(2):022301.吴立恒,王明红.带有光子晶体U-型谐振器的反射式分束器[J].激光与光电子学进展,2016,53(2):022301.
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[10]Liu Yunfeng,Liu Bing,He Xingdao,et al.Study on splitting management characteristics of ring resonance cavity based on photonic crystal waveguide[J].Acta Optica Sinica,2015,35(s1):s113001.刘云凤,刘彬,何兴道,等.基于光子晶体波导环形共振腔的分束管理特性研究[J].光学学报,2015,35(s1):s113001.
[2]Wong G,Pilkington R,Harvey A R.Achromatization of Wollaston polarizing beam splitters[J].Optics Letters,2011,36(8):1332-1334.
[3]Zhang Yueguang,Sheng Yongjiang,Ai Manling,et al.Wideband and wide angle polarizing beam splitter[J].Optical Instruments,2001,23(6):198-201.章岳光,盛永江,艾曼灵,等.宽波段宽角度偏振分束薄膜[J].光学仪器,2001,23(6):198-201.
[4]Zhu Guixin,Yu Tianbao,Chen Shuwen,et al.A new ultracompact polarizing beam splitter based on photonic crystal directional coupler[J].Acta Photonica Sinica,2010,39(3):450-454.朱桂新,于天宝,陈淑文,等.一种新型光子晶体波导定向耦合型超微偏振光分束器[J].光子学报,2010,39(3):450-454.
[5]Guo Hao,Wu Ping,Yu Tianbao,et al.Design of novel polarization beam splitter in two-dimensional photonic crystal[J].Acta Physica Sinica,2010,59(8):5547-5552.郭浩,吴评,于天宝,等.一种新型的光子晶体偏振光分束器的设计[J].物理学报,2010,59(8):5547-5552.
[6]Zhou Fei,Fei Hongming,Chen Zhihui,et al.A high efficiency photonic crystal polarization beam splitter[J].Laser&Optoelectronics Progress,2013,50(6):062304.周飞,费宏明,陈智辉,等.一种高效光子晶体偏振光分束器[J].激光与光电子学进展,2013,50(6):062304.
[7]Jia Yajun,Liang Wenyao,Chen Wuhe.Study on Y-shape power splitters based on broadband and all-angle supercollimation effect of photonic crystals[J].Acta Optica Sinica,2015,35(11):1116002.贾亚俊,梁文耀,陈武喝.基于光子晶体宽带全角超准直效应的Y型能量分束器的研究[J].光学学报,2015,35(11):1116002.
[8]Wu Liheng,Wang Minghong.Reflecting splitter based on photonic crystal U-shaped resonators[J].Laser&Optoelectronics Progress,2016,53(2):022301.吴立恒,王明红.带有光子晶体U-型谐振器的反射式分束器[J].激光与光电子学进展,2016,53(2):022301.
[9]Li Xuyou,Xu Zhenlong,Liu Pan,et al.Short polarization splitter based on dual-core photonic crystal fiber with ultrahigh extinction ratio[J].Chinese J Lasers,2015,42(6):0605006.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.
[10]Liu Yunfeng,Liu Bing,He Xingdao,et al.Study on splitting management characteristics of ring resonance cavity based on photonic crystal waveguide[J].Acta Optica Sinica,2015,35(s1):s113001.刘云凤,刘彬,何兴道,等.基于光子晶体波导环形共振腔的分束管理特性研究[J].光学学报,2015,35(s1):s113001.