On-chip rotated polarization directional coupler fabricated by femtosecond laser direct writing

被引：33
|
作者：
Wang, Ci-Yu [1 ,2 ]
Gao, Jun [1 ,2 ]
Jin, Xian-Min [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
[2] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China
来源：
OPTICS LETTERS | 2019年 / 44卷 / 01期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
OPTICAL WAVE-GUIDES; FUSED-SILICA; INDUCED BIREFRINGENCE; HEAT ACCUMULATION; PHOTONIC DEVICES; WRITTEN; STRESS; GLASS;
D O I：
10.1364/OL.44.000102
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a rotated polarization directional coupler (RPDC) on a photonic chip. We demonstrate a double-track approach to modify the distribution of the refractive index between adjacent tracks and form a single waveguide with an arbitrary birefringent optical axis. We construct a RPDC with the two axis-rotated waveguides coupled in a strong regime. The obtained extinction ratios on average are about 16 dB and 20 dB for the corresponding orthogonal polarizations. We perform reconstruction of the Stokes vector to test the projection performance of our RPDC, and observe the average fidelities up to 98.1% and 96.0% for the perfectly initialized states in 0 degrees and 45 degrees RPDCs, respectively. (C) 2018 Optical Society of America
引用
收藏
页码：102 / 105
页数：4
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