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Updated: Jun 1, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Experimental comparison of coherent polarization-switched QPSK to polarization-multiplexed QPSK for 10 × 100 km WDM
L E Nelson1, X Zhou, N Mac Suibhne
1AT&T Labs – Research, 200 South Laurel Avenue, Middletown, New Jersey 07748, USA. lenelson@research.att.com
Abstract:
Polarization-switched quadrature phase-shift keying has been demonstrated experimentally at 40.5 Gb/s with a coherent receiver and digital signal processing. Compared to polarization-multiplexed QPSK at the same bit rate, its back-to-back sensitivity at 10(-3) bit-error-ratio shows 0.9dB improvement, and it tolerates about 1.6 dB higher launch power for 10 × 100 km, 50 GHz-spaced WDM transmission allowing 1 dB penalty in required optical-signal-to-noise ratio relative to back-to-back.
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