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Impedance adaptive laser diode driving circuit

A technology of laser diodes and driving circuits, applied in circuits, lasers, laser parts, etc., can solve the problems of laser diode damage, no overcurrent power-off and over-temperature power-off protection functions, and achieve the effect of efficient work

Inactive Publication Date: 2019-03-29
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Again, ZL200710056012.6 does not have the protection functions of over-current power-off and over-temperature power-off. Once the current limiting module fails, it will cause the risk of output driving current exceeding the safe current, resulting in damage to the driven laser diode.

Method used

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  • Impedance adaptive laser diode driving circuit
  • Impedance adaptive laser diode driving circuit
  • Impedance adaptive laser diode driving circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 Overall structure of the present invention

[0043] Overall structure of the present invention is as figure 1 As shown, there are current setting module 1, limiting setting module 2, power output module 3, load judging module 4, delay compensation module 5, voltage tracking module 6, overcurrent judging module 7, power-off protection module 8, over-temperature Judgment module 9, soft start module 10, reference voltage module 11 and power management module 12; Wherein, current setting module 1 is connected with limiting setting module 2, limiting setting module 2 is connected with power output module 3, soft starting module 10 is connected with The power output module 3 is connected, the power output module 3 is connected with the load judging module 4 and the overcurrent judging module 7 respectively, the reference voltage module 11 is connected with the load judging module 4, the load judging module 4 is connected with the delay compensation module 5, and ...

Embodiment 2

[0044] Embodiment 2 The current setting module of the present invention

[0045] The current setting module 1 of the present invention can adopt such as figure 2 In the structure shown, one end of the resistor R40 is connected to the power supply Vdd, the other end is connected to the cathode of the Zener diode D3 and a fixed end of the sliding rheostat W6, the anode of the Zener diode D3 is grounded, the other fixed end of the sliding rheostat W6 is grounded, and the resistor One end of R41 is connected to the sliding wire end of the sliding rheostat W6, the other end is connected to the non-inverting input end of the operational amplifier U11B, the inverting input end of the operational amplifier U11B is connected to one end of the resistor R42, and the other end of the resistor R42 is connected to the output end of the operational amplifier U11B. And as the output terminal of the current setting module 1, denoted as port CSet-out, connected to the input terminal of the lim...

Embodiment 3

[0047] Embodiment 3 Limit setting module of the present invention

[0048] The principle circuit of limiter setting module 2 of the present invention is as image 3As shown, one end of the resistor R45 is used as the input end of the limit setting module 2, which is recorded as port CL-in, and the other end is connected to the non-inverting input end of the operational amplifier U12B and the positive pole of the diode D4, and the negative pole of the diode D4 is connected to the output of the operational amplifier U11A end and one end of the resistor R44, the other end of the resistor R44 is connected to the inverting input end of the operational amplifier U11A, the non-inverting input end of the operational amplifier U11A is connected to one end of the resistor R43, and the other end of the resistor R43 is connected to the sliding end of the sliding rheostat W7. One end of the rheostat W7 is connected to the power supply Vdd, the other end is grounded, the inverting input end...

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Abstract

The invention relates to an impedance adaptive laser diode driving circuit and belongs to the technical field of electronic equipment. The impedance adaptive laser diode driving circuit comprises a current setting module (1), a amplitude-limiting setting module (2), a power output module (3), a load determining module (4), a delay compensation module (5), a voltage following module (6) and a power-off protection module (8). The impedance adaptive laser diode driving circuit can actively adapt to the change of a load in operation, and has high efficiency, a wide load adaptation range, high safety and high reliability.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment. In particular, it relates to an impedance adaptive laser diode drive circuit. Background technique [0002] Fiber lasers are widely used in national defense, military industry, high-precision industrial processing and other fields due to their high efficiency, good heat dissipation, good beam quality, simple structure, small size, and light weight. The basic components of a fiber laser are a pump source, a fiber gain medium, and an optical resonator. Among them, the pump source is the most basic component of the entire fiber laser system, which has an important impact on the overall performance of the fiber laser system. The pump source is mainly composed of a high-power semiconductor laser diode and a drive and control circuit. Since the semiconductor laser diode is a device with high power density and extremely high quantum efficiency, its ability to withstand electrical shock is...

Claims

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Application Information

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IPC IPC(8): H01S5/042
CPCH01S5/042
Inventor 高博郭玉彬郑浩田小建汝玉星吴戈霍佳雨
Owner JILIN UNIV
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