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

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

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 enviro...

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Veröffentlicht in:Optics express 2021-01, Vol.29 (2), p.1265-1274
Hauptverfasser: Iiyama, Noriko, Fujiwara, Masamichi, Kanai, Takuya, Suzuki, Hiro, Kani, Jun-Ichi, Terada, Jun
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container_end_page 1274
container_issue 2
container_start_page 1265
container_title Optics express
container_volume 29
creator Iiyama, Noriko
Fujiwara, Masamichi
Kanai, Takuya
Suzuki, Hiro
Kani, Jun-Ichi
Terada, Jun
description 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-µs burst QPSK frames over 20-km transmission in the presence of a 100-ppm clock mismatch.
doi_str_mv 10.1364/OE.410522
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title Clock conversion for burst-mode digital coherent QPSK receivers in a PON upstream transmission with a 100-ppm clock mismatch
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