Wavelength synchronization technology for UDWDM-PON transmitter based on injection locking
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.
基金项目：This work was supported in part by the National Natural Science Foundation of China (NSFC) (Nos. 61775162 and 61427817).
贾婷：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
王帅帅：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
李天宇：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
马闯：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
谢田元：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
于洋：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
于晋龙：School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
备注：This work was supported in part by the National Natural Science Foundation of China (NSFC) (Nos. 61775162 and 61427817).
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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," Chinese Optics Letters 19(1), 010602 (2021)