Invention Grant
- Patent Title: Optical receiver, optical receiving device, and method for correcting received optical intensity
- Patent Title (中): 光接收机,光接收装置和校正接收光强度的方法
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Application No.: US14439108Application Date: 2013-10-30
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Publication No.: US09509413B2Publication Date: 2016-11-29
- Inventor: Yasuyuki Suzuki
- Applicant: NEC Corporation
- Applicant Address: JP Tokyo
- Assignee: NEC CORPORATION
- Current Assignee: NEC CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP2012-241996 20121101
- International Application: PCT/JP2013/006435 WO 20131030
- International Announcement: WO2014/068978 WO 20140508
- Main IPC: H04B10/06
- IPC: H04B10/06 ; H04B10/61 ; H03F3/08 ; H03F3/45

Abstract:
The common mode rejection ratio (CMRR) decreases due to the difference in receiving intensity of the optical signal or in photoelectric conversion efficiency of the photodiode in the related coherent optical receiver, therefore, an optical receiver according to an exemplary aspect of the present invention includes a first photodiode receiving a first optical signal and outputting a positive signal; a second photodiode receiving a second optical signal and outputting a complementary signal; a differential transimpedance amplifier receiving the positive signal and outputting an amplified positive signal voltage, and receiving the complementary signal and outputting an amplified complementary signal voltage; and a gain adjustment means for adjusting a first gain of a gain of the differential transimpedance amplifier for the positive signal and a second gain of a gain of the differential transimpedance amplifier for the complementary signal.
Public/Granted literature
- US20150295660A1 OPTICAL RECEIVER, OPTICAL RECEIVING DEVICE, AND METHOD FOR CORRECTING RECEIVED OPTICAL INTENSITY Public/Granted day:2015-10-15
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