ILX Lightwave LDP-3840/03 – Precision Pulsed Current Source, 3A

The ILX Lightwave LDP-3840/03 is a precision pulsed current source delivering up to 3 A of peak pulse current for testing higher power laser diodes and sensitive optoelectronic devices. The instrument combines nanosecond-scale pulse control with advanced laser safety interlocks and CDRH compliance, making it suitable for R&D and manufacturing environments where device protection and measurement repeatability are critical.

Technical Specifications

• Maximum Peak Pulse Current: 3 A


• Pulse Width Range: 100 ns to 10 µs


• Pulse Width Resolution: 100 ns


• Pulse Width Accuracy: –35 to 10 ns


• Rise/Fall Time: < 40 ns (typical)


• Overshoot: Less than 5%


• Pulse Polarity: User-selectable (positive or negative)


• Output Accuracy (at setpoints < 10% of full range): 20 mA ±4% of setpoint


• Operating Temperature: 10°C to 40°C


• Storage Temperature: –40°C to 70°C


• Humidity: 300 mA ensure practical accuracy across operating range


• Redundant output shorting circuits and transient suppression protect against load faults


• Closed-case calibration with non-volatile memory storage eliminates downtime


• Microprocessor-controlled architecture reduces maintenance overhead


• Meets CDRH US 21 CFR 1040.10 laser safety regulations

Typical Applications Optical component testing, laser diode characterization, pulsed semiconductor device validation, and automated manufacturing test systems requiring software control and fast pulse sequencing.

Compatibility & Integration

• GPIB Interface: IEEE-488 for remote instrument control


• Trigger Functions: Standard Trigger-In and Trigger-Out connectors


• Mounting Boards: Compatible with LPB-382P (case +) and LPB-382N (case –); LPB-380 recommended for optimized pulse response


• Software Support: LabVIEW® 3.0 instrument driver available


• Dimensions: 88 mm H × 185 mm W × 304 mm D


• Weight: 3.6 kg