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  • Received: May. 2, 2020

    Accepted: Sep. 4, 2020

    Posted: Nov. 26, 2020

    Published Online: Dec. 18, 2020

    The Author Email: Ju Wang (wangju@tju.edu.cn)

    DOI: 10.3788/COL202119.010602

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    Ju Wang, Ting Jia, Shuaishuai Wang, Tianyu Li, Chuang Ma, Tianyuan Xie, Yang Yu, Jinlong Yu. Wavelength synchronization technology for UDWDM-PON transmitter based on injection locking[J]. Chinese Optics Letters, 2021, 19(1): 010602

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Chinese Optics Letters, Vol. 19, Issue 1, 010602 (2021)

Wavelength synchronization technology for UDWDM-PON transmitter based on injection locking

Ju Wang*, Ting Jia, Shuaishuai Wang, Tianyu Li, Chuang Ma, Tianyuan Xie, Yang Yu, and Jinlong Yu

Author Affiliations

  • School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China

Abstract

We propose a concept of wavelength synchronization to ensure the stability of ultra-dense channels in an ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) transmitter. A mode-locked laser is used to provide wavelength references for users. By injection locking the semiconductor laser, the separation of the wavelength reference is realized in an optical line terminal. The downlink and uplink wavelength references are interlaced and distributed to facilitate the synchronization of uplink carriers. In the optical network unit, the uplink optical carriers are filtered by injection locking semiconductor lasers, which achieve wavelength synchronization for the uplink users. In this Letter, an adaptive wavelength synchronization transmitter for UDWDM-PON is realized with a channel spacing of 5 GHz.

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