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Constant current source device for driving laser diode and control method thereof

A technology of laser diodes and constant current sources, applied in control/regulation systems, regulation of electrical variables, instruments, etc., can solve problems such as integration, volume, cost, and heat generation that are not easy to control

Pending Publication Date: 2021-09-10
苏州贝林激光有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For a system with multiple laser diodes, multiple different voltage sources are required, so for an integrated laser, its integration, volume, cost and heat generation are not easy to control

Method used

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  • Constant current source device for driving laser diode and control method thereof

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Embodiment Construction

[0020] 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.

[0021] It should be noted that like numerals and let...

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Abstract

The invention relates to a constant current source device for driving a laser diode and a control method. A remote control interface is connected with an MCU through an RS232 interface, a current setting and feedback interface is connected with the MCU, a power interface is connected with a power module and a DCDC module, the MCU is connected with an MOS tube driving module, the MOS tube driving module is in driving connection with a BUCK circuit of the DCDC module, the BUCK circuit is connected with a laser diode interface, the voltage measuring circuit and the current measuring circuit are respectively connected with the ADC module and respectively connected with the MOS tube driving module, the temperature sensor is connected with the ADC module, and the MCU is connected with the ADC module. A constant current source driving device which is wide in self-adaptive working voltage, wide in working current range and high in efficiency is adopted to achieve driving which is easy to integrate, small in size, low in cost and low in heating value, the working voltage ranges from 5 V to 30 V, the maximum working current reaches 20 A, the requirement for most laser diodes is met, and the maximum working voltage and the maximum working current can be set.

Description

technical field [0001] The invention relates to a constant current source device for driving a laser diode and a control method thereof. Background technique [0002] The laser diode is the source of laser energy, and its energy output will directly affect the stability of the laser energy output. It is a very important part of the laser. A laser diode is a semiconductor device, which has a nonlinear relationship between the voltage and current applied to it, and a linear relationship between the output power and the input current. Different laser diodes sometimes have large voltage deviations under the same magnitude of current. [0003] In long-term use, the output efficiency of the laser diode will decrease. If the same optical power is still required, the operating current needs to be increased, so that the operating voltage at both ends of the laser diode will also increase accordingly. If it is driven by a constant voltage source mode, it is necessary to increase the ...

Claims

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Application Information

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IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 赵裕兴张园
Owner 苏州贝林激光有限公司
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