公开(公告)号：WO2004073181A3

公开(公告)日：2004-08-26

申请号：PCT/US2004/003706

申请日：2004-02-09

Applicant: KODEOS COMMUNICATIONS, INC. ,  STARK, Jason, B.

Inventor： STARK, Jason, B.

IPC: H04B10/04

Abstract: A filtered three-level transmitter (700) is provided by filtering a binary electrical drive signal to produce a unit modulation pulse spannint four-bit-periods and describable by three parameters. One or more of the three parameters of the unit modulation pulse are adjusted to optimize a figure of merit associated with performance of an optical transmission system. A three-level electrical drive signal (721) is then generated from the unit modualtion pulse for input to a Mach-Zehnder modulator (730). The three parameters of the unit modulation pulse are each defined over a half-bit period and together are sufficient to describe a line-coded transmission eye diagram. The parameters are adjusted so that an optical transmission system in which the inventive transmitter is utilized is optimized with a set level of net chromatic dispersion.

公开(公告)号：WO2004072714A2

公开(公告)日：2004-08-26

申请号：PCT/US2004/003737

申请日：2004-02-09

Applicant: KODEOS COMMUNICATIONS, INC. ,  HAREL, Roey ,  PAPPAS, Dean ,  SHTENGEL, Gleb ,  STARK, Jason, B. ,  LEROY, Donald. V.

Inventor： HAREL, Roey ,  PAPPAS, Dean ,  SHTENGEL, Gleb ,  STARK, Jason, B. ,  LEROY, Donald. V.

IPC: G02F

CPC classification number: G02F1/0123 ,  G02F2201/126

Abstract: A method and apparatus is provided for controlling the bias point of a Mach-Zehnder modulator. The method begins by applying a dither signal to a DC bias that is applied to a Mach-Zehnder modulator. A component of an optical output signal provided by the Mach-Zehnder modulator that is synchronous with the dither signal is detected. The dither signal is adjusted to maintain the detected component of the optical output signal at a substantially constant value.

Abstract translation: 提供了一种用于控制马赫 - 曾德尔调制器的偏置点的方法和装置。 该方法开始于施加到施加到马赫 - 曾德尔调制器的DC偏压上的抖动信号。 检测与抖动信号同步的由Mach-Zehnder调制器提供的光输出信号的分量。 调整抖动信号以将光输出信号的检测分量保持在基本恒定的值。

公开(公告)号：EP1590705A2

公开(公告)日：2005-11-02

申请号：EP04709447.9

申请日：2004-02-09

Applicant: Kodeos Communications

Inventor： HAREL, Roey ,  PAPPAS, Dean ,  SHTENGEL, Gleb ,  STARK, Jason, B. ,  LEROY, Donald. V.

IPC: G02F1/00

CPC classification number: G02F1/0123 ,  G02F2201/126

Abstract: A method and apparatus is provided for controlling the bias point of a Mach-Zehnder modulator. The method begins by applying a dither signal to a DC bias that is applied to a Mach-Zehnder modulator. A component of an optical output signal provided by the Mach-Zehnder modulator that is synchronous with the dither signal is detected. The dither signal is adjusted to maintain the detected component of the optical output signal at a substantially constant value.

公开(公告)号：EP1590901A2

公开(公告)日：2005-11-02

申请号：EP04709498.2

申请日：2004-02-09

Applicant: Kodeos Communications, Inc.

Inventor： STARK, Jason, B.

IPC: H04B10/04

CPC classification number: H04B10/508 ,  H04B10/25137 ,  H04B10/505 ,  H04B10/541

Abstract: A filtered three-level transmitter (700) is provided by filtering a binary electrical drive signal to produce a unit modulation pulse spannint four-bit-periods and describable by three parameters. One or more of the three parameters of the unit modulation pulse are adjusted to optimize a figure of merit associated with performance of an optical transmission system. A three-level electrical drive signal (721) is then generated from the unit modualtion pulse for input to a Mach-Zehnder modulator (730). The three parameters of the unit modulation pulse are each defined over a half-bit period and together are sufficient to describe a line-coded transmission eye diagram. The parameters are adjusted so that an optical transmission system in which the inventive transmitter is utilized is optimized with a set level of net chromatic dispersion.