Drive power supply of laser diodes

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 ...

AI Technical Summary

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 equipment systems, the current is mainly adjusted by analog voltage, which is carried out through TTL. Enable and fault alarm, so it is easy to be interfered by external factors, especially when applied to electro-optical Q lasers with high-voltage switches.

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