Invention Grant
- Patent Title: Optical signal modulation circuit and apparatus
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Application No.: US16452389Application Date: 2019-06-25
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Publication No.: US10897311B2Publication Date: 2021-01-19
- Inventor: Liqiang Yu , Liming Fang , Sulin Yang , Xiaofeng Zhang
- Applicant: HUAWEI TECHNOLOGIES CO., LTD.
- Applicant Address: CN Guangdong
- Assignee: HUAWEI TECHNOLOGIES CO., LTD.
- Current Assignee: HUAWEI TECHNOLOGIES CO., LTD.
- Current Assignee Address: CN Guangdong
- Agency: Womble Bond Dickinson (US) LLP
- Main IPC: H04B10/04
- IPC: H04B10/04 ; H04B10/50 ; G02F1/015 ; H01S5/00 ; H04B10/564

Abstract:
An optical signal modulation circuit includes a laser (DFB), a modulator (EAM), and an operational amplifier. The laser (DFB) generates a laser to stimulate the modulator (EAM) to generate a photon-generated current (ip), a first port (a) of the modulator (EAM) is connected to a first input voltage (Vbias), a second port (b) of the modulator (EAM) is connected to an inverting input end of the operational amplifier, a non-inverting input end of the operational amplifier is connected to a second input voltage (Vin), and an output end of the operational amplifier is connected to the first port (a) of the modulator. In the modulation circuit, a photon-generated current (ip) of the EAM is fed back to the operational amplifier, to implement a linear relationship between the second input voltage (Vin) and the photon-generated current (ip) of the EAM, and obtain a linear EML transmission curve, namely, a high-linearity EML.
Public/Granted literature
- US20190319711A1 OPTICAL SIGNAL MODULATION CIRCUIT AND APPARATUS Public/Granted day:2019-10-17
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