title: Control and Stabilization of bit-wise phase correlation in 160 (4 x 40) Gbit/s OTDM signal and its impact on transmission.
abstract: Detail of control technique of bit-wise phase correlation in 160 (4 x 40) Gbit/s optical time division multiplexing (OTDM) signal using a phase-correlation monitor based on 1-bit delay asymmetric interferometers (AIFs) is described. The 1-bit delay AIF transforms a bit-by-bit optical phase discontinuity to an optical power variation, so that it enables to quantify the phase-jump between adjacent bits. By use of this unique technique, we experimentally demonstrated stable generation of bitwisely phase-controlled 160 Gbit/s periodical alternate-phase return-to-Zero (APRZ) signal in addition to other different modulation formats such as conventional RZ, carrier suppressed RZ (CS-RZ), pair-wise alternate-phase CSRZ (PAP-CSRZ) and pi/2-APRZ. And long term stability was observed with CS-RZ signal. Also, we show some experimental results of 120 km un-repeatered transmission using standard single mode fiber (SSMF) and then discuss the impact of bit-wise phase change on 160 Gbit/s OTDM transmission performance.
authors.affiliation: Corporate Research and Development Center, Oki Electric Industry Co., Ltd., 550-5 Higashiasakawa, Hachioji, Tokyo 193-8550, Japan. kagawa337@oki.com
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Kagawa
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Murai
authors.forename: Hiromi
authors.initials: H
authors.lastname: Tsuji
authors.forename: Kensuke
authors.initials: K
authors.lastname: Sasaki
authors.forename: Kozo
authors.initials: K
authors.lastname: Fujii
mesh_terms: D004867:Equipment Design; D005583:Fourier Analysis; D007368:Interferometry / Q000295:instrumentation* / Q000379:methods*; D015233:Models, Statistical; D008962:Models, Theoretical; D016011:Normal Distribution; D055095:Optics and Photonics; D013696:Temperature; D014159:Transducers