- Patent Title: Tap stabilizer method and structure for coherent optical receiver
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Application No.: US16134722Application Date: 2018-09-18
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Publication No.: US10476603B2Publication Date: 2019-11-12
- Inventor: Mario R. Hueda , Oscar E. Agazzi
- Applicant: INPHI CORPORATION
- Applicant Address: US CA Santa Clara
- Assignee: INPHI CORPORATION
- Current Assignee: INPHI CORPORATION
- Current Assignee Address: US CA Santa Clara
- Agency: Ogawa P.C.
- Agent Richard T. Ogawa
- Main IPC: H04B10/61
- IPC: H04B10/61 ; H04L25/03 ; H04L27/26 ; H04L7/00 ; H04B10/079 ; H04L1/00 ; H04B10/40

Abstract:
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.
Public/Granted literature
- US20190036615A1 TAP STABILIZER METHOD AND STRUCTURE FOR COHERENT OPTICAL RECEIVER Public/Granted day:2019-01-31
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