Laser driving circuit and optical module

A laser drive and optical module technology, applied in circuits, lasers, laser parts and other directions, can solve the problem of lasers not working properly

CN109244812APending Publication Date: 2019-01-18APAT OPTOELECTRONICS COMPONENTS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-01-18

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Abstract

A laser driving circuit and an optical module are disclosed. A laser driving circuit includes a signal input terminal, a laser driving chip, a signal input module, and a logic error correction module;The input end of the logic error correction module is connected with the signal input end, the output end of the logic error correction module is respectively connected with the input end of the laser driving chip and the signal input module, and the output end of the laser driving chip is used for connecting the laser. At this time, the logic error correction module corrects the laser driving control signal input from the signal input terminal, so that the laser working state represented by the signal input to the laser driving chip and the signal input module is kept consistent, thereby solving the technical problem that the laser of the optical module in the prior art does not work normally.
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Description

technical field

[0001] The invention relates to the technical field of power supply modules, in particular to a laser drive circuit and an optical module. Background technique

[0002] According to the SFF Committee (Small Form Factor Committee) SFF-8431 agreement, the small pluggable optical module transmit enable voltage is -0.3V ~ 0.8V, and the transmit disable voltage is 2V+0.3V, while the common The GN7151 10G laser driver chip’s enabling voltage is -0.3V~0.7V, and the disabling voltage is 1.2V+0.3V. In a conventional laser drive circuit, the enable / shutdown signal sent by the customer single board passes through the golden finger of the optical module and is directly connected to the laser drive chip to drive the laser to turn on or off, and is directly connected to the microprocessor to report the status. When it is greater than 0.7V and less than 0.8V, the laser driver chip does not work, and the laser has the risk of not emitting light, which is inconsistent with t...

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Embodiment Construction

[0023] 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 part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0024] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second" and ...