Drive power supply of laser diodes

A technology of laser diode and driving power supply, applied in lasers, laser parts, semiconductor lasers, etc., can solve the problems of insufficient current control accuracy, poor anti-interference, large current ripple coefficient, etc., and achieve the output of laser diode pumped laser. The single pulse energy or power is stable and the beam quality is good

Active Publication Date: 2012-01-04
上海致凯捷激光科技有限公司
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  • Abstract
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Problems solved by technology

[0004] The traditional analog laser diode drive power supply has disadvantages such as poor anti-interference, large space electromagnetic radiation, large current ripple coefficient, and insufficient current control accuracy. When connecting with other eq

Method used

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  • Drive power supply of laser diodes
  • Drive power supply of laser diodes

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Example Embodiment

[0021] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited by this.

[0022] See first figure 1 , figure 1 It is a schematic diagram of the structure of the laser diode drive power supply of the present invention. It can be seen from the figure that the laser diode driving power supply of the present invention is composed of an embedded controller 2. The first pulse width modulation port 0 of the embedded controller 2 is connected to the input pin of the first field effect tube driving chip 3. The output pin of the field effect tube driving chip 3 is connected to the G pin of the P channel field effect tube 4, and the S pin of the P channel field effect tube 4 is connected to the positive pole of the power supply VDD14;

[0023] The second pulse width modulation port of the embedded controller 2 is connected to the input pin of the second field effect tube d...

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Abstract

The invention provides a drive power supply of laser diodes, comprising an isolated CAN (controller area network) communication module, an embedded controller, three FET (field-effect transistor) drive chips, a P channel FET, two N channel FETs, a current sensor, an amplifier, a choking coil and a Schottky diode. The high power pulses are compatible with a continuous operation mode, and a real-time communication function is integrated to realize full-digital parameter adjustment and control. A plurality of motivational patterns of the laser diodes are supported, thus being capable of dynamically adjusting exciting currents or pulse widths of the laser diodes, thereby ensuring that monopulse energy or power output by the drive power supply of the laser diodes is more stable and the beam quality is preferable. For the drive power supply, the current can reach 120A, the current adjustment accuracy is 0.01A, the stability is +/- 0.5%, the modulation efficiency is 100kHz maximally under a pulse mode, and the rising edge is 1-10us.

Description

technical field [0001] The invention relates to a laser diode driving power supply, in particular to a laser diode driving power supply. The power supply is suitable for a variety of semiconductor end-pump laser diodes and side-pump laser diodes, and can be applied to continuous pump and pulse pump lasers. The power supply especially has threshold current and dynamic current pulse width adjustment to make the laser power or energy more stable. technical background [0002] At present, the laser diode drive power supply basically uses high-power FETs or IGBTs to adjust the current through current feedback in the power tube amplification area to achieve the purpose of constant current. This type of power supply has low efficiency and large heat loss, especially for driving 2V / 60A, etc. For low-voltage laser diodes, the current is difficult to increase, and the efficiency can reach up to 60%. It needs to add a huge radiator to work, and there are also requirements for the use ...

Claims

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Application Information

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IPC IPC(8): H01S5/042
Inventor 施伟田怀勇金英杰
Owner 上海致凯捷激光科技有限公司
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