High Power Laser Diode Driver Schematic

Laser light amplification by stimulated emission of radiation and laser diodes are widely used in different domain applications it gives focused light ray in visible spectrum and laser diodes will perform good in regulated constant current.

High power laser diode driver schematic.

As battery start giving supply it first flow through the ceramic capacitor 0 1uf. In this project laser diode driver circuit is developed. Depends on application laser chosen at different range nm nano meter wavelength and watts. Therefore drive current max 18v higher than power voltage of ic can be added as drive voltage of laser diode.

A more powerful laser diode driver is discussed in 83 3. 2 produce constant current driven through the ld load. Too little current and the laser diode will not have sufficient power to turn on and operate. The lddhc series high power laser diode driver is a new family of oem laser diode drivers designed for the emerging high power laser diode industry.

Their are kw level drivers available in pulsed and qcw mode versions. A driver circuit is a circuit which can limit appropriately the amount of current being fed into the laser diode so that it can function correctly. They can work in two ways. Working of laser diode driver circuit.

1 produce constant regulated voltage. For the driving of the laser diodes ld special drivers circuits are used. Elm recommends inserting resistance between laser diode module ldm and kld if the drive voltage is high so as to disperse power loss. 60 amps 15 volts 600 watt high power laser diode driver module compact analog interface lacosys laser control systems gmbh 1139 00 0 3 amps 20 volts 300ma ten channel compact laser diode driver luzwavelabs.

The second type is more easy to design and us. The potentiometer 10k and resistor are used as the voltage limiting circuit connected with the adjustable pin1. The user determines the maximum setting and the output current is kept from exceeding that level. An active current limit circuit will disable the laser diode driver current.

The author of 2 presents a high speed laser diode driver for driving relatively low power laser diodes with a current up to 80 ma. Too much current and the laser diode will blow. Some limit circuits cap the current at the max level and keep operating. A high power laser diode driver is 5 amps and up to 100 s of amps in a cw mode.

With output currents to 200amps the lddhc series high power laser diode driver is available in 3 power levels and a wide range of compliance voltages. These are by no means standards just a generalization based on the author s experience in the laser diode controller world.