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Laser drive circuit

A technology for driving circuits and lasers, which is applied in the field of circuits, can solve the problems of low integration of laser drivers, achieve the effects of improving signal utilization, saving costs, and meeting light output requirements

Active Publication Date: 2021-06-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a laser driving circuit, which can solve the problem of low integration of laser drivers in the related art

Method used

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Embodiment Construction

[0091] The embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0092] figure 1 It is a schematic structural diagram of an optical link system provided in the embodiment of this application, such as figure 1 As shown, the system may include a transmitter (Transmitter, Tx) 01 , a laser driver 02 , an electro-optical converter 03 , an optical fiber 04 , a photodetector 05 , a transimpedance amplifier 06 and a receiver (Receiver; Rx) 07 . Wherein, the laser driver may include the laser driver circuit provided by the embodiment of the present application, and the laser driver circuit may be integrated on the driver chip, or on the printed circuit board (Printed Circuit Board; PCB) or the main board, and this is not done. limited. The electro-optical converter can be VCSEL or DML, etc., and the laser drive circuit can be connected to the electro-optical converter through metal wires or flip-chip welding....

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Abstract

The application discloses a laser drive circuit, which belongs to the technical field of circuits. The laser drive circuit includes: a drive circuit and an impedance conversion circuit; the drive circuit is used to receive an initial voltage signal, convert the initial voltage signal into a target voltage signal, and output the target voltage signal to the impedance conversion circuit ; The impedance conversion circuit is used to convert the target voltage signal into a target current signal, and provide the target current signal to the electro-optical converter, the target current signal includes an AC working signal and a DC bias signal, and the DC The bias signal is used to provide the static operating point current of the electro-optic converter. The present application solves the problem of low integration of laser drivers in the related art.

Description

technical field [0001] The present application relates to the field of circuit technology, in particular to a laser driving circuit. Background technique [0002] With the rapid development of Internet technology, the demand for optoelectronic interconnection continues to grow. The current optoelectronic link system (also known as optoelectronic interconnection link system) mainly includes Application Specific Integrated Circuit (ASIC) chip, laser driver (Laser Driver), laser, optical fiber, photodetector ( Photoelectric Detector; PD) and transimpedance amplifier (Trans-Impedance Amplifier; TIA). The ASIC chip is coupled with the laser driver through the Serdes interface (a serial communication interface) set in the ASIC chip, and provides the initial voltage signal to the laser driver; the laser driver is used to convert the initial voltage signal into a current signal, and provide the laser The current signal; when the current signal passes through the laser, the laser i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/042
CPCH01S5/042
Inventor 臧大军王翠翠王临春陆玉春刘庆智莫道春雷文阳徐小飞
Owner HUAWEI TECH CO LTD