title: Experimental comparison of coherent polarization-switched QPSK to polarization-multiplexed QPSK for 10 × 100 km WDM transmission.
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.
authors.affiliation: AT&T Labs – Research, 200 South Laurel Avenue, Middletown, New Jersey 07748, USA. lenelson@research.att.com
authors.forename: L E
authors.initials: LE
authors.lastname: Nelson
authors.forename: X
authors.initials: X
authors.lastname: Zhou
authors.forename: N
authors.initials: N
authors.lastname: Mac Suibhne
authors.forename: A D
authors.initials: AD
authors.lastname: Ellis
authors.forename: P
authors.initials: P
authors.lastname: Magill