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High-reliability constant voltage mode semiconductor laser driver with continuously adjustable output light power

A technology of laser driver and constant voltage mode, which is applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve the problems of amplifier heating, slow response of current limiting protection, etc., achieve efficient protection, solve severe heating, and fast response effects

Inactive Publication Date: 2011-12-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to solve the problem of severe heating of the amplifier and slow response of current limiting protection when the existing semiconductor laser is high-power, so as to provide a highly reliable constant-voltage mode semiconductor laser driver with continuously adjustable output optical power

Method used

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  • High-reliability constant voltage mode semiconductor laser driver with continuously adjustable output light power
  • High-reliability constant voltage mode semiconductor laser driver with continuously adjustable output light power
  • High-reliability constant voltage mode semiconductor laser driver with continuously adjustable output light power

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specific Embodiment approach 1

[0018] Specific implementation mode 1. Combination figure 1 Describe this specific implementation mode, a highly reliable constant voltage mode semiconductor laser driver with continuously adjustable output optical power, which includes an MCU controller 1, a power supply circuit 2, a step-down circuit 3, a reverse connection protection circuit 4, and an anti-surge impact circuit 5 , filter circuit 6, voltage sampling circuit 7, current sampling circuit 8, constant current control circuit 9, thermistor 10, sampling circuit 11, temperature control circuit 12, TEC refrigerator 13 and laser diode LD;

[0019] The power signal output end of the power supply circuit 2 is connected to the power signal input end of the step-down circuit 3, the power signal output end of the step-down circuit 3 is connected to the signal input end of the reverse connection protection circuit 4, and the signal output end of the reverse connection protection circuit 4 It is connected with the signal inp...

specific Embodiment approach 2

[0038] Embodiment 2. The difference between this embodiment and the highly reliable constant voltage mode semiconductor laser driver with continuously adjustable output optical power described in Embodiment 1 is that it also includes a monitoring and display circuit 15. The monitoring and display circuit 15 The temperature signal input end of the MCU controller 1 is connected with the temperature signal output end.

[0039] This embodiment can monitor and display the current operating parameters of the system.

specific Embodiment approach 3

[0040] Embodiment 3. The difference between this embodiment and the highly reliable constant voltage mode semiconductor laser driver with continuously adjustable output optical power described in Embodiment 1 is that it also includes an alarm circuit 16, and the alarm circuit 16 The signal input end is connected with the alarm signal output end of the MCU controller 1 .

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Abstract

The invention discloses a high-reliability constant voltage mode semiconductor laser driver with continuously adjustable output light power, and relates to a semiconductor laser driver. The driver solves the problems of serious amplifier heating and slow current limiting protection response in the high power of a conventional semiconductor laser. A voltage sampling circuit of the driver is used for acquiring the voltage of a laser diode. A current sampling circuit of the driver is used for acquiring the current of the laser diode. Constant current control circuit is used for controlling the intensity of the current flowing through the laser diode. The sampling signal output end of the voltage sampling circuit is connected with the sampling signal input end of a micro control unit (MCU). The sampling signal output end of the current sampling circuit is connected with the sampling signal input end of the constant current control circuit. The control signal input end of the constant current control circuit is connected with the constant current control signal output end of the MCU. A thermal resistor is used for acquiring the temperature of the laser diode. A thermoelectric cooler (TEC) is used for cooling the laser diode. The driver is suitable for use as a novel high-reliability constant voltage mode light source with the continuously adjustable output light power.

Description

technical field [0001] The invention relates to a semiconductor laser driver. Background technique [0002] Semiconductor laser (Laser Diode referred to as LD) as a new type of light source has incomparable characteristics compared with other lasers. The output characteristics of LD are not only closely related to its own materials and processes, but also the quality of the drive device greatly affects its output characteristics. Therefore, when using a semiconductor laser, a drive device with good performance should be selected, which is extremely important for better performance of the semiconductor laser. At present, there are a large number of general-purpose semiconductor laser drivers on the market, which only need to provide their power and signals to work. However, most of the drivers are composed of pure hardware, and the system integration is low, the anti-interference ability is poor, and the laser protection function is not perfect, resulting in low output prec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042
Inventor 杨春玲翁凯雷张传雨张思文张振东
Owner HARBIN INST OF TECH
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