• Photonics Research
  • Vol. 9, Issue 11, 11002176 (2021)
Guo-Wei Zhang1、2, Yu-Yang Ding3、6、*, Wei Chen1、2、7、*, Fang-Xiang Wang1、2, Peng Ye1、2, Guan-Zhong Huang1、2, Shuang Wang1、2, Zhen-Qiang Yin1、2, Jun-Ming An4、5, Guang-Can Guo1、2, and Zheng-Fu Han1、2
Author Affiliations
  • 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • 3Hefei Guizhen Chip Technologies Co., Ltd., Hefei 230000, China
  • 4State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 5Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 6e-mail: dingyuyang@gz-ichip.com
  • 7e-mail: weich@ustc.edu.cn
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    Abstract

    Interferometers are essential elements in classical and quantum optical systems. The strictly required stability when extracting the phase of photons is vulnerable to polarization variation and phase shift induced by environment disturbance. Here, we implement polarization-insensitive interferometers by combining silica planar light-wave circuit chips and Faraday rotator mirrors. Two asymmetric interferometers with temperature controllers are connected in series to evaluate the single-photon interference. Average interference visibility over 12 h is above 99%, and the variations are less than 0.5%, even with active random polarization disturbance. The experiment results verify that the hybrid chip is available for high-demand applications like quantum key distribution and entanglement measurement.

    1. INTRODUCTION

    Photons are the most critical information carriers and perform high-fidelity operations in up-to-date information-processing systems. The interferometer plays an essential role in various information-processing applications, either in classical or quantum research fields, including metrology and sensing [1], coherent optical communication [2], quantum entanglement measurement [3], quantum communication [47], and many other fields [812].

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    Guo-Wei Zhang, Yu-Yang Ding, Wei Chen, Fang-Xiang Wang, Peng Ye, Guan-Zhong Huang, Shuang Wang, Zhen-Qiang Yin, Jun-Ming An, Guang-Can Guo, Zheng-Fu Han. Polarization-insensitive interferometer based on a hybrid integrated planar light-wave circuit[J]. Photonics Research, 2021, 9(11): 11002176
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    Category: Integrated Optics
    Received: May. 25, 2021
    Accepted: Aug. 25, 2021
    Published Online: Oct. 9, 2021
    The Author Email: Yu-Yang Ding (dingyuyang@gz-ichip.com), Wei Chen (weich@ustc.edu.cn)