CUED Publications database

Laser linewidth tolerance for 16-QAM coherent optical systems using QPSK partitioning

Fatadin, I and Ives, D and Savory, SJ (2010) Laser linewidth tolerance for 16-QAM coherent optical systems using QPSK partitioning. IEEE Photonics Technology Letters, 22. pp. 631-633. ISSN 1041-1135

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Abstract

The laser linewidth tolerance for 16-ary quadrature amplitude modulation (16-QAM) coherent optical systems is investigated using a quaternary phase-shift-keying (QPSK) partition scheme. The different stages needed to partition the square-16-QAM into QPSK constellations for carrier phase estimation are discussed. It is shown that at 1 dB above sensitivity at a bit-error rate of 10 , a combined linewidths symbol duration product of 1 × 10 is tolerable. The performance of the algorithm with different bits resolution in the analog-to-digital converter is also presented. © 2010 IEEE. -3 -4

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Unnamed user with email sms67@cam.ac.uk
Date Deposited: 17 Jul 2017 19:20
Last Modified: 15 Apr 2021 03:11
DOI: 10.1109/LPT.2010.2043524