The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2021
Filed:
Jun. 25, 2019
Huawei Technologies Co., Ltd., Guangdong, CN;
Liqiang Yu, Shenzhen, CN;
Liming Fang, Dongguan, CN;
Sulin Yang, Dongguan, CN;
Xiaofeng Zhang, Dongguan, CN;
HUAWEI TECHNOLOGIES CO., LTD., Guangdong, CN;
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 (i), a first port (a) of the modulator (EAM) is connected to a first input voltage (V), 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 (V), 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 (i) of the EAM is fed back to the operational amplifier, to implement a linear relationship between the second input voltage (V) and the photon-generated current (i) of the EAM, and obtain a linear EML transmission curve, namely, a high-linearity EML.