The Newport 501AN Laser Diode Driver with Analog Interface delivers precision current control for laser diodes with dual operating modes and integrated protection. This driver combines constant current and constant laser power modes in a single instrument, with selectable output ranges optimized for resolution and accuracy. An external analog modulation input enables voltage-controlled modulation of the drive current, supporting remote operation via function generators or voltage sources. Redundant FET and relay shorting circuits, adjustable current limits, and voltage limit features protect the laser diode from overcurrent conditions. A built-in monitor photodiode circuit operates zero-biased or reverse-biased to 5 Volts without requiring external power supplies.
Technical Specifications
• Output Current: Selectable ranges including 0-50 mA, 0-100 mA, 0-200 mA
• Set-Point Resolution: 0.005 mA, 0.010 mA
• Set-Point Accuracy: ± 0.1 % FS
• Compliance Voltage: 7 Volts
• Temperature Coefficient: < 50 ppm/°C
• Monitor Photodiode: 0 to 5 Volts (zero or reverse bias)
– Key Features
• Constant current and constant laser power operating modes
• Multiple hardware current limits with adjustable thresholds
• Redundant FET and relay shorting circuits for diode protection
• Voltage limit protection features
• External analog modulation input via BNC connector
• Bandwidth selection switch for output noise reduction
• Interlock pins (back panel) required for output activation
• Requires laser enable keyswitch for operation
– Typical Applications
Laser diode drivers for research, telecommunications, and industrial laser systems requiring stable current delivery with programmable power limiting and real-time modulation capabilities.
– Compatibility & Integration
The analog interface supports remote control and monitoring. Standard PC-style power connector (NEMA 5-15P to IEC-320-C13) required. Monitor photodiode circuit operates independently without external bias supplies.
