- 专利标题: Tap stabilizer method and structure for coherent optical receiver
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申请号: US16584674申请日: 2019-09-26
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公开(公告)号: US10944484B2公开(公告)日: 2021-03-09
- 发明人: Mario R. Hueda , Oscar E. Agazzi
- 申请人: INPHI CORPORATION
- 申请人地址: US CA Santa Clara
- 专利权人: INPHI CORPORATION
- 当前专利权人: INPHI CORPORATION
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Ogawa P.C.
- 代理商 Richard T. Ogawa
- 主分类号: H04B10/61
- IPC分类号: H04B10/61 ; H04L25/03 ; H04L7/00 ; H04L27/26 ; H04B10/079 ; H04L1/00 ; H04B10/40
摘要:
A method and structure for a coherent optical receiver device. Timing recovery (TR) is implemented after channel dispersion (i.e., chromatic dispersion (CD) and polarization mode dispersion (PMD)) compensation blocks. This architecture provides both improves performance and reduces power consumption of the device. Also, a TR loop is provided, enabling computing, by an error evaluation module, a first sampling phase error (SPE) and computing, by a timing phase information (TPI) module coupled to the error evaluation module, a second SPE from a plurality of CD equalizer taps PMD equalizer taps. The first and second SPE are combined into a total phase error (TPE) in a combining module, and the resulting TPE is filtered by a timing recovery (TR) filter coupled to an interpolated timing recovery (ITR) module and the combining module. The ITR module then synchronizes an input signal of the coherent optical receiver according to the TPE.
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