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Laser driving circuit and optical module

A driving circuit and laser technology, applied in the field of optical communication, can solve the problems of high cost and complex circuit structure, and achieve the effects of saving cost, simplifying circuit structure, and ensuring stability and reliability

Pending Publication Date: 2020-11-06
SOURCE PHOTONICS CHENGDU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to improve the shortcomings of complex circuit structure and high cost in the prior art, and provide a laser drive circuit and optical module to simplify the circuit structure and reduce costs

Method used

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  • Laser driving circuit and optical module
  • Laser driving circuit and optical module
  • Laser driving circuit and optical module

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0025] see figure 2 , this embodiment schematicall...

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Abstract

The invention relates to a laser driving circuit and an optical module. The laser driving circuit comprises an MCU, an APC bias driving circuit, a switch module, a current adjusting circuit and a laser. The MCU is connected with the APC bias drive circuit and the current adjusting circuit at the same time. The MCU is used for controlling and outputting a driving voltage to the APC bias driving circuit and controlling and outputting a working voltage to the current adjusting circuit, an output current of the APC bias driving circuit is input into the laser through the current adjusting circuit,and the current adjusting circuit is used for adjusting the magnitude of a current flowing into the laser. The laser driving circuit is simple in structure, and can effectively protect the laser frombeing damaged by high current under the condition of maintaining stable output power.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a laser drive circuit and an optical module. Background technique [0002] The main function of the optical module is to realize the photoelectric / electro-optical conversion, which is an important part of the optical fiber communication system. The optical module mainly includes the optical transmitting sub-module (TOSA) and the optical receiving sub-module (ROSA). The laser light-emitting diode LD is a necessary component of the TOSA and is used to emit a laser beam. The laser driving circuit is a circuit that outputs a driving current to the laser to prompt the laser to emit a laser beam. Since the luminous efficiency of the laser will decrease after a long time of use, in order to maintain the stability of the output power, the laser drive circuit will gradually increase the bias current, but when the drive current reaches a certain level, the output power will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042
CPCH01S5/042
Inventor 贾朝波谢初旭陈丽
Owner SOURCE PHOTONICS CHENGDU