公开(公告)号：JP2003098489A

公开(公告)日：2003-04-03

申请号：JP2002201705

申请日：2002-07-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GILL DOUGLAS M ,  WEI XING

IPC: G02F1/01 ,  G02F1/03 ,  G02F1/035 ,  G02F1/313 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04L27/20

Abstract: PROBLEM TO BE SOLVED: To provide an improved optical modulator which employs minimum shift keying (MSK). SOLUTION: An optical modulator implemented with an MSK format is disclosed. The modulator creates two separate pulse streams (one pulse stream comprising odd number of bits and the other comprising even number of bits of the data stream) using a half pulse generator. The modulator then uses electrooptic phase modulators to encode the odd and even numbered bits separately, and a 50/50 coupler to recombine them.

公开(公告)号：AU2007297667B2

公开(公告)日：2010-08-05

申请号：AU2007297667

申请日：2007-09-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WEI XING ,  LIU XIANG

IPC: H04B10/158

Abstract: A digital version of both amplitude and phase of a received optical is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

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：DE602005002284T2

公开(公告)日：2008-02-14

申请号：DE602005002284

申请日：2005-02-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LIU XIANG ,  SU YIKAI ,  WEI XING

IPC: H04B10/00 ,  H04B10/17

公开(公告)号：DE602005000871D1

公开(公告)日：2007-05-24

申请号：DE602005000871

申请日：2005-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  LIU XIANG ,  WEI XING ,  YING JINPIN

IPC: H04B10/18 ,  H04J14/02

Abstract: A dispersion compensator apparatus including interleavers for deinterleaving/interleaving even and odd channels of a WDM signal, and dispersion compensation modules (DCMs) coupled between the interleavers. One or more of the DCMs is a periodic-group-delay (PGD) DCMs for providing dispersion compensation.

公开(公告)号：AU2007297667A1

公开(公告)日：2008-03-27

申请号：AU2007297667

申请日：2007-09-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WEI XING ,  LIU XIANG

IPC: H04B10/158

Abstract: A digital version of both amplitude and phase of a received optical is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

公开(公告)号：DE60200475T2

公开(公告)日：2005-05-25

申请号：DE60200475

申请日：2002-03-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GILL DOUGLAS M ,  WEI XING

IPC: G02F1/01 ,  G02F1/03 ,  G02F1/035 ,  G02F1/313 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04L27/20

Abstract: The specification describes an optical modulator implemented with an MSK format. The modulator creates two separate pulse streams (one pulse stream comprising the odd bits and the other comprising the even bits of the data stream) using a 1-by-2 pulse generator (13, 14, 16). The modulator then uses electrooptic phase modulators (17, 18) to encode the odd and even numbered bits separately, and a 50/50 coupler (21) to remix them.

公开(公告)号：DE60200475D1

公开(公告)日：2004-06-17

申请号：DE60200475

申请日：2002-03-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GILL DOUGLAS M ,  WEI XING

IPC: G02F1/01 ,  G02F1/03 ,  G02F1/035 ,  G02F1/313 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04L27/20

Abstract: The specification describes an optical modulator implemented with an MSK format. The modulator creates two separate pulse streams (one pulse stream comprising the odd bits and the other comprising the even bits of the data stream) using a 1-by-2 pulse generator (13, 14, 16). The modulator then uses electrooptic phase modulators (17, 18) to encode the odd and even numbered bits separately, and a 50/50 coupler (21) to remix them.

公开(公告)号：BRPI0716906A2

公开(公告)日：2013-11-05

申请号：BRPI0716906

申请日：2007-09-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LIU XIANG ,  WEI XING

Abstract: A digital version of both amplitude and phase of a received optical is developed by employing direct differential detection in conjunction with digital signal processing. The signal is split into three copies. An intensity profile is conventionally obtained using one of the copies. Phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers that have orthogonal phase offsets, followed by respective balanced intensity detectors. The output of each of the balanced intensity detectors, and the intensity profile, are each converted to respective digital representations. Signal processing is used to develop the phase information from the digital representations of the output of the balanced intensity detector outputs.

公开(公告)号：DE602005000871T2

公开(公告)日：2007-12-20

申请号：DE602005000871

申请日：2005-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  LIU XIANG ,  WEI XING ,  YING JINPIN

IPC: H04B10/18 ,  H04J14/02

Abstract: A dispersion compensator apparatus including interleavers for deinterleaving/interleaving even and odd channels of a WDM signal, and dispersion compensation modules (DCMs) coupled between the interleavers. One or more of the DCMs is a periodic-group-delay (PGD) DCMs for providing dispersion compensation.