High power laser diode driver provides pulsed current

IXYS Corporation has announced the introduction of the PCX-6425 high power laser diode driver/current source by its IXYS Colorado division. This instrument provides precision pulsed current with accurate microprocessor-based digital power control.

The PCX-6425 is an air cooled, bench top high power current source designed to drive laser diodes, bars and arrays at up to 150A of current and 120V maximum forward voltage. Pulse widths are adjustable from 100 microseconds to 5 milliseconds with pulse repetition rates from single shot to 100Hz. With variable output current and voltage, the PCX-6425 is ideal for research, laboratory, scientific and industrial applications.

The PCX-6425 may be operated through its intuitive front panel controls. The display provides immediate visual confirmation of all operating parameters, including output voltage, pulsed cur¬rent set points, and error/fault messages.

For automated applications, complete control of the instrument is provided through RS-232 or USB computer interfaces.

Conveniently located front panel BNC connector allows the PCX-6425 to be externally triggered. The current monitor and voltage monitor are also located on the front panel utilizing a BNC connector for each.


The laser diode is connected to the front panel of the PCX-6425 through a low-impedance twisted pair cable designed to preserve the fidelity of high-speed current pulses.

PCX-6425 features:

  • Variable output current from 0 amperes to 150A
  • Variable output voltage from 0 volts to 120V
  • Rise and fall times less than 25 microseconds
  • Pulse widths from 100 microseconds to 5,000 microseconds
  • Able to drive both single diodes and arrays with variable forward voltages up to 120V
  • Diode and driver safety features, including overcurrent limit, open-load detection and diode steering (prevents reverse current)
  • Simplified operation with intuitive touch screen interface
  • USB and RS232 computer interfaces standard
  • CE and RoHS compliant

“The PCX-6425 builds on the architecture of IXYS Colorado’s proven pulsed current source designs, while incorporating adjustable output voltage to provide a broader range of operating parameters and design flexibility,” said Stephen Krausse, General Manager of IXYS Colorado. “This driver leverages decades of IXYS Colorado design and the power integration experience of our parent company, IXYS Corporation, with its advanced power MOS device technology, to deliver one of the highest power, most user-friendly drivers available on the market today.”

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