Description

The LDX-3500 Series Laser Diode Current Sources is a low-cost microprocessor-based precision instrument specifically designed to control low to high power laser diodes. It provides a low noise, high-stability current output for precise control of laser diodes, so measurements in development or production can be made with confidence. The LDX-3500 Series has dual current ranges of 200/500 mA. In addition to precision current control, it is loaded with standard features including PD current measurement for constant power control, analog modulation for power and wavelength tuning, and an analog output for remote monitoring.

This unit has the following specifications:

Current Output
Current Source: 200 mA Range 500 mA Range
Set Point Accuracy: +/- 0.2 mA +0.5 mA
Set Point Resolution: 50 microA 125 microA
Compliance Voltage (fixed): 7 V maximum 7 V maximum
Temperature Coefficient: < 50 ppm/ C < 50 ppm/ C
Stability (1 hour): < 20 ppm < 20 ppm
Stability (24 hours): < 50 ppm < 50 ppm
Noise and Ripple:
High Bandwidth Mode: < 4 microA < 4 microA
CW Mode: < 2 microA < 2 microA
Transients:
Operational: < 1 microA < 1 microA
Power-line induced: < 5 microA < 5 microA

Photodiode Feedback
Type: Differential
Reverse Bias: 0 - 5 V, adjustable
Range: 5 to 5000 microA
Output Stability: +/- 0.02%
Set Point Accuracy: +/- 5 microA
Power Modulation Bandwidth: 1 kHz