公开(公告)号：JP2001285198A

公开(公告)日：2001-10-12

申请号：JP2001058123

申请日：2001-03-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BRENER IGAL M ,  MIKKELSEN BENNY ,  ROTTWITT KARSTEN ,  STARK JASON BLAIN

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04B10/16

Abstract: PROBLEM TO BE SOLVED: To solve a problem of nonlinearity of fibers in a long distance communication system. SOLUTION: The optical transmission system of this invention in a system employing an optical fiber optical path (especially in a system where a DWDM is used to transmit a power signal with a comparatively high level is sent to a low scattering fiber) is formed to have an optical phase conjugation unit 200 at its alternate iteration site and minimizes the presence of nonlinearity resulting from 4-wave mixing and other Kerr effect. Each fiber span 160 includes a Raman gain to realize 'absorption of negative components' along the length of the fiber 160 thereby realizing a substantially symmetrical power distribution along the length of each span. Then the presence of the symmetrical power distribution at each side face of the optical phase conjugation unit 200 can remarkably enhance the performance.

公开(公告)号：JP2001267664A

公开(公告)日：2001-09-28

申请号：JP2001035271

申请日：2001-02-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SHMULOVICH JOSEPH ,  BRENER IGAL M ,  LENZ GADI

IPC: G02B6/122 ,  G02F1/365 ,  H01S3/06 ,  H01S3/063 ,  H01S3/067 ,  H01S3/094

Abstract: PROBLEM TO BE SOLVED: To provide a waveguide structure equipped with a pump laser maintaining fixed pump power density. SOLUTION: This waveguide structure includes an Er dope waveguide amplifier and a non-linear waveguide wavelength converter device or an optical fiber. The waveguide structure is provided with a waveguide area formed like a taper shape across a pump propagating distance. This pump propagating distance is set as a prescribed distance between a first pump sit and a second pump site, and pump lights are allowed to propagate for amplifying or converting a signal across the distance between those pump sites. The taper can reduce the depletion of the pump power, and maintain pump power density to be almost fixed across the pump propagating length. Thus, it is possible to reduce the depletion of the pump.

公开(公告)号：CA2332696C

公开(公告)日：2005-05-03

申请号：CA2332696

申请日：2001-01-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STARK JASON BLAIN ,  ROTTWITT KARSTEN ,  BRENER IGAL M ,  MIKKELSEN BENNY PETER

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04B10/12

Abstract: An optical transmission system is formed to include an optical phase conjugator at alternate repeater sites to minimize the presence of four-wave mixing and other Kerr effect nonlinearities in systems using optical fiber transmission paths (particularly in systems using DWDM and launching relatively high power signals into the low dispersion fiber). Raman gain is included in each fiber span (o r in alternate fiber spans) so as to provide a "negative absorption" along the length of the fiber and thereby provide for essentially symmetrical power distribution alo ng the length of each span, where the presence of such a symmetric power distributi on on each side of an optical phase conjugator has been found to significantly improve its performance.

公开(公告)号：DE60128281T2

公开(公告)日：2008-01-10

申请号：DE60128281

申请日：2001-02-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BRENER IGAL M ,  MIKKELSEN BENNY PETER ,  ROTTWITT KARSTEN ,  STARK JASON BLAIN

IPC: G02F1/35 ,  H01S3/30 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29

Abstract: An optical transmission system is formed to include an optical phase conjugator (200) at alternate repeater sites to minimize the presence of four-wave mixing and other Kerr effect nonlinearities in systems using optical fiber transmission paths (particularly in systems using DWDM and launching relatively high power signals into the low dispersion fiber). Raman gain is included in each fiber span (or in alternate fiber spans) so as to provide a "negative absorption" along the length of the fiber and thereby provide for essentially symmetrical power distribution along the length of each span, where the presence of such a symmetric power distribution on each side of an optical phase conjugator (200) has been found to significantly improve its performance.

公开(公告)号：DE60128281D1

公开(公告)日：2007-06-21

申请号：DE60128281

申请日：2001-02-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BRENER IGAL M ,  MIKKELSEN BENNY PETER ,  ROTTWITT KARSTEN ,  STARK JASON BLAIN

IPC: G02F1/35 ,  H01S3/30 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29

Abstract: An optical transmission system is formed to include an optical phase conjugator (200) at alternate repeater sites to minimize the presence of four-wave mixing and other Kerr effect nonlinearities in systems using optical fiber transmission paths (particularly in systems using DWDM and launching relatively high power signals into the low dispersion fiber). Raman gain is included in each fiber span (or in alternate fiber spans) so as to provide a "negative absorption" along the length of the fiber and thereby provide for essentially symmetrical power distribution along the length of each span, where the presence of such a symmetric power distribution on each side of an optical phase conjugator (200) has been found to significantly improve its performance.

公开(公告)号：CA2332696A1

公开(公告)日：2001-09-06

申请号：CA2332696

申请日：2001-01-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MIKKELSEN BENNY PETER ,  BRENER IGAL M ,  ROTTWITT KARSTEN ,  STARK JASON BLAIN

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04B10/12

Abstract: An optical transmission system is formed to include an optical phase conjugator at alternate repeater sites to minimize the presence of four-wave mixing and other Kerr effect nonlinearities in systems using optical fiber transmission paths (particularly in systems using DWDM and launching relatively high power signals into the low dispersion fiber). Raman gain is included in each fiber span (o r in alternate fiber spans) so as to provide a "negative absorption" along the length of the fiber and thereby provide for essentially symmetrical power distribution alo ng the length of each span, where the presence of such a symmetric power distributi on on each side of an optical phase conjugator has been found to significantly improve its performance.