- 专利标题: Method and Apparatus for Characterization and Compensation of Optical Impairments in InP-Based Optical Transmitter
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申请号: US15488507申请日: 2017-04-16
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公开(公告)号: US20170222725A1公开(公告)日: 2017-08-03
- 发明人: Suhas P. Bhandare , Heider N. Ereifej , Ihab E. Khalouf , Mark Colyar
- 申请人: Finisar Corporation
- 申请人地址: US PA Horsham
- 专利权人: Finisar Corporation
- 当前专利权人: Finisar Corporation
- 当前专利权人地址: US PA Horsham
- 主分类号: H04B10/54
- IPC分类号: H04B10/54 ; H04B10/508
摘要:
A method and apparatus for characterizing and compensating optical impairments in an optical transmitter includes operating an optical transmitter comprising a first and second parent MZ, each comprising a plurality of child MZ modulators that are biased at respective initial operating points. An electro-optic RF transfer function is generated for each of the plurality of child MZ modulators. Curve fitting parameters are determined for each of the plurality of electro-optic RF transfer functions and operating points of each child MZ modulator are determined using the curve fitting parameters. An IQ power imbalance is determined using the curve fitting parameters. Initial RF drive power levels are determined that compensate for the determined IQ power imbalance. The XY power imbalance is determined for initial RF drive power levels using the curve fitting parameters. The operating RF drive powers are determined that at least partially compensate for the first and second IQ power imbalances and for the XY power imbalance for the optical transmitter.