An Intelligent Laser Control Circuit

Abstract

The invention discloses an intelligent laser device control circuit. The intelligent laser device control circuit comprises a single chip microcomputer and a laser device, parameters of the laser device are input into the single chip microcomputer through an I / O port, the single chip microcomputer outputs a control signal to an operational amplifier circuit, the operational amplifier circuit is connected with a corresponding drive control circuit, a loop is formed by the drive control circuit and the corresponding operational amplifier circuit, and the hardware loop self-control state is achieved. The intelligent laser device control circuit has the advantages of loop control, high intelligence and high reliability. The feedback loop is formed through a backward stage operational amplifiercircuit to achieve the purpose of hardware loop control. By means of software judgment, the backward stage operational amplifier circuit is driven, the mode of directly driving the circuit through A / D pins previously is replaced, the circuit reliability is improved, and it is avoided that the laser device is burnt as a software running-out drive circuit is out of control. By means of software andhardware parallel operation and loop control, the intelligent level and reliability of the circuit are improved.

Description

technical field [0001] The invention relates to a control circuit, in particular to an intelligent laser control circuit, and belongs to the technical field of electronic equipment control. Background technique [0002] With the successive start of FTTH network construction in various places, the two-way transformation area of ​​the network is gradually expanding from cities to scattered rural areas. The demand for broadband in the rural market is growing rapidly, and the use of optical transmitters and optical amplifiers is increasing day by day. [0003] The laser control circuit inside conventional optical transmitters and optical amplifiers is relatively simple and mainly provides driving functions. Other functions such as automatic temperature control (ATC) and automatic power control (APC) are controlled by single-chip microcomputer programs. For conventional circuit structures, please refer to the attached figure 1 , in the conventional scheme, the parameters of the l...

AI Technical Summary

Problems solved by technology

[0003] The laser control circuit inside conventional optical transmitters and optical amplifiers is relatively simple and mainly provides driving functions. Other functions such as automatic temperature control (ATC) and automatic power control (APC) are controlled by single-chip microcomputer programs. For conventional circuit structures, please refer to the attached figure 1 , in the conventional scheme, the parameters of the laser are collected and transmitted to the I / O port of the single-chip microcomputer through the temperature detection circuit, the current detection circuit, etc. / heating circuit, power control circuit, to achieve the effect of controlling the temperature and power of the laser, this kind of circuit not only has a slow response speed, but once a bug occurs in the program, it is easy to cause circuit imbalance, laser burnout, etc.

If there is a BUG in the MCU program or there is a problem with the MCU hardware, it is very easy to cause the drive circuit to get out of control and burn the laser.

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