公开(公告)号：JPH1010478A

公开(公告)日：1998-01-16

申请号：JP8254297

申请日：1997-04-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HEISMANN FRED L ,  SMITH ROBERT W

IPC: G02F1/035 ,  G02F1/01 ,  G02F1/03 ,  G02F1/225

Abstract: PROBLEM TO BE SOLVED: To respectively independently adjust both modulations by respectively independently adjusting the phase modulation and the polarity modulation and adopting a desired combination for the polarity modulation free from chirps and the phase modulation free from chirps. SOLUTION: Phase modulators 115, 120 are driven by the voltages of sinusoidal waveforms of V1 cos(Ωt+ϕ) and V2 cos(Ωt). Here, Ω/2π is a modulation frequency and ϕ is an adjustable phase. The phase delay quantities ϕ1 (t) and ϕ2 (t) induced by these separate voltages are respectively equal to Δϕ1 cos(Ωt+ϕ) and Δϕ2 cos(Ωt). The high-speed polarity scrambler 10 is capable of forming the combination of the phase delay difference ϕ(t) and common phase modulation Ψ(t) when the two independent phase modulators 115, 125 are respectively driven by the voltages of the sinusoidal waveforms from this Jones vector equation. The adjustment of relative driving phase ϕ and peak phase fluctuations Δϕ1 and Δϕ2 via driving voltages amplitude V1 , V2 is merely necessitated.

公开(公告)号：JP2001211120A

公开(公告)日：2001-08-03

申请号：JP2000381365

申请日：2000-12-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMANN FRED L ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B10/18

Abstract: PROBLEM TO BE SOLVED: To provide a compensator which compensates polarization mode dispersion. SOLUTION: A receiver compensates the influence of the polarization dispersion on an optical signal during propagation in an optical fiber by using a birefringence compensator. A distortion analyzer inspects the signal outputted from the compensator, which operates based on the inspection result to reduce the influence of polarization compensation dispersion.

公开(公告)号：DE60024208T2

公开(公告)日：2006-08-03

申请号：DE60024208

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMANN FRED L ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B10/18 ,  G02B6/34 ,  H04L25/06

Abstract: The effect of polarization mode dispersion that an optical signal experiences as it propagates through an optical transmission fiber is compensated for at a receiver using a birefringent compensator, in which a distortion analyzer repeatedly examines the signal outputted by the compensator and causes the compensator to reduce the effect of such polarization mode dispersion based on the results of such examination.

公开(公告)号：DE60024208D1

公开(公告)日：2005-12-29

申请号：DE60024208

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMANN FRED L ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B10/18 ,  H04L25/06 ,  G02B6/34

Abstract: The effect of polarization mode dispersion that an optical signal experiences as it propagates through an optical transmission fiber is compensated for at a receiver using a birefringent compensator, in which a distortion analyzer repeatedly examines the signal outputted by the compensator and causes the compensator to reduce the effect of such polarization mode dispersion based on the results of such examination.