Clock conversion for burst-mode digital coherent QPSK receivers in a PON upstream transmission with a 100-ppm clock mismatch

被引:0
|
作者
Iiyama, Noriko [1 ]
Fujiwara, Masamichi [1 ]
Kanai, Takuya [1 ]
Suzuki, Hiro [1 ]
Kani, Jun-ichi [1 ]
Terada, Jun [1 ]
机构
[1] NTT Access Network Serv Syst Labs, 1-1 Hikarinooka, Yokosuka, Kanagawa 2390847, Japan
关键词
GB/S DP-QPSK; DSP; TIME;
D O I
10.1364/OE.410522
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
This paper presents a clock conversion scheme for burst-mode digital coherent QPSK receivers in an asynchronous PON upstream and confirms its validity. The scheme converts the number of samplings of transmitted signal based on the clock at Rx. We demonstrate the proposed scheme in a realistic environment that emulates a fixed clock difference by two independent synthesizers at Tx and Rx mixed together with clock jitter induced by 20-km fiber transmission. In the real-time demonstration, a digital coherent receiver employing the proposed clock conversion successfully receives 330-mu s burst QPSK frames over 20-km transmission in the presence of a 100-ppm clock mismatch. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码:1265 / 1274
页数:10
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