ILX Lightwave Corp. has introduced the LDX-3600 series current sources for controlling and testing high-power laser diodes. Five models offer currents of 10 to 120 A, with a compliance voltage of up to 10 V in both CW and quasi-CW modes. The company says that they deliver high set-point accuracy and low output noise. Features include four-wire voltage measurement, adjustable voltage and current limits, output shorting relays and an IEEE-488/GPIB interface. The power display mode enables power to be set based on slope efficiency and threshold current. External output power monitoring is supported through an independent photodiode measurement circuit.