公开(公告)号：DE602005000213T2

公开(公告)日：2007-09-06

申请号：DE602005000213

申请日：2005-02-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DORRER CHRISTOPHE J ,  GNAUCK ALAN H ,  KANG INUK ,  XIE CHONGJIN

IPC: G02F1/03 ,  H04B10/02 ,  H04B10/135 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/18 ,  H04B10/43

Abstract: Methods and apparatus are provided for transmitting alternate-polarization phase-shift-keyed data. The output of a laser is modulated to optically encode electronic data using phase shift keying (PSK) to generate an optical signal. An alternate polarization PSK (APol-PSK) signal is generated by alternating the polarization of the optical signal using a modulator such that successive optical bits have substantially orthogonal polarizations.

公开(公告)号：DE602004006946T2

公开(公告)日：2008-02-14

申请号：DE602004006946

申请日：2004-11-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LIU XIANG ,  MOELLER LOTHAR B E J ,  WEI XING ,  XIE CHONGJIN

IPC: H04L25/49 ,  H04L25/497 ,  H03M5/18 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/158 ,  H04B10/26 ,  H04B10/43 ,  H04L7/04 ,  H04L25/06

Abstract: An optical receiver adapted to process an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder. The decoder processes an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder integrates the electrical signal using a sampling window and compares the integration result with a decision threshold value. In one configuration, the width of the sampling window and the decision threshold value are selected based on the eye diagram and noise distribution function, respectively, corresponding to the optical signal. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by improving dispersion tolerance and/or reducing optical power corresponding to a selected bit error rate value.

公开(公告)号：DE602005000213D1

公开(公告)日：2006-12-14

申请号：DE602005000213

申请日：2005-02-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DORRER CHRISTOPHE J ,  GNAUCK ALAN H ,  KANG INUK ,  XIE CHONGJIN

IPC: H04B10/02 ,  G02F1/03 ,  H04B10/04 ,  H04B10/135 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/18 ,  H04B10/43

Abstract: Methods and apparatus are provided for transmitting alternate-polarization phase-shift-keyed data. The output of a laser is modulated to optically encode electronic data using phase shift keying (PSK) to generate an optical signal. An alternate polarization PSK (APol-PSK) signal is generated by alternating the polarization of the optical signal using a modulator such that successive optical bits have substantially orthogonal polarizations.

公开(公告)号：DE602004006946D1

公开(公告)日：2007-07-26

申请号：DE602004006946

申请日：2004-11-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LIU XIANG ,  MOELLER LOTHAR B E J ,  WEI XING ,  XIE CHONGJIN

IPC: H04L25/49 ,  H04L25/497 ,  H03M5/18 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/158 ,  H04B10/26 ,  H04B10/43 ,  H04L7/04 ,  H04L25/06

Abstract: An optical receiver adapted to process an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder. The decoder processes an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder integrates the electrical signal using a sampling window and compares the integration result with a decision threshold value. In one configuration, the width of the sampling window and the decision threshold value are selected based on the eye diagram and noise distribution function, respectively, corresponding to the optical signal. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by improving dispersion tolerance and/or reducing optical power corresponding to a selected bit error rate value.

公开(公告)号：DE602004001300T2

公开(公告)日：2007-05-31

申请号：DE602004001300

申请日：2004-07-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DE LIND VAN WIJNGAARDEN ADRIAA ,  LIU XIANG ,  XIE CHONGJIN

IPC: H04B10/02 ,  H04B10/18 ,  G02B6/27 ,  H04J14/00 ,  H04J14/02

Abstract: A system and method for multi-channel PMD/PDL/PDG mitigation, the system including polarization scramblers adapted to vary the state of polarization of an optical signal propagated through the system to effectively vary the polarization mode dispersion experienced by the signal during each burst-error-correcting-period of the forward error correction used in the system.

公开(公告)号：DE602004001300D1

公开(公告)日：2006-08-03

申请号：DE602004001300

申请日：2004-07-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DE LIND VAN WIJNGAARDEN ADRIAA ,  LIU XIANG ,  XIE CHONGJIN

IPC: H04B10/02 ,  H04B10/18 ,  G02B6/27 ,  H04J14/00 ,  H04J14/02

Abstract: A system and method for multi-channel PMD/PDL/PDG mitigation, the system including polarization scramblers adapted to vary the state of polarization of an optical signal propagated through the system to effectively vary the polarization mode dispersion experienced by the signal during each burst-error-correcting-period of the forward error correction used in the system.