title: In-band OSNR monitor with high-speed integrated Stokes polarimeter for polarization division multiplexed signal.
abstract: An in-band optical signal-to-noise ratio (OSNR) monitor is proposed, based on an instantaneous polarization state distribution analysis. The proposed monitor is simple, and is applicable to polarization division multiplexed signals. We fabricate a high-speed Stokes polarimeter that integrates a planar lightwave circuit (PLC) based polarization filter, high-speed InP/InGaAs photodiodes and InP hetero-junction bipolar transistor (HBT) trans-impedance amplifiers (TIA). We carry out proof-of-concept experiments with the fabricated polarimeter, and successfully measure the OSNR dependent polarization distribution with 100-Gb/s dual polarization quadrature phase shift keying (DP-QPSK) signals.
authors.affiliation: NTT Photonics Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan. saida.takashi@lab.ntt.co.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Saida
authors.forename: Ikuo
authors.initials: I
authors.lastname: Ogawa
authors.forename: Takayuki
authors.initials: T
authors.lastname: Mizuno
authors.forename: Kimikazu
authors.initials: K
authors.lastname: Sano
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Fukuyama
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Muramoto
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Hashizume
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Nosaka
authors.forename: Shuto
authors.initials: S
authors.lastname: Yamamoto
authors.forename: Koichi
authors.initials: K
authors.lastname: Murata