The Newport 5600-20 is a 20 Ampere laser diode driver engineered for high-power applications demanding exceptional current control and output stability. It delivers precise, low-noise current with 16-bit resolution across all laser diode parameters, including forward voltage characterization. The driver operates in Continuous Wave (CW) and Quasi-Continuous Wave (QCW) modes with selectable Constant Current (I) or Constant Power (P) control. External analog modulation and internal sine/square-wave modulation (200 Hz to 300 kHz) enable dynamic power and wavelength tuning. Multiple compliance voltage options (5 to 30 V maximum) accommodate diverse diode configurations. Time-tested protection circuits—including input filtering, transient detection, slow turn-on sequencing, and output shorting protection—safeguard laser diodes during operation and transient events.
Technical Specifications
• Output current: 20 A
• Control resolution: 16-bit for current and characterization
• Compliance voltage: 5 to 30 V (user-selectable maximum)
• Output stability: < 100 nA rms (low-noise models)
• Monitor photodiode bias: −5 V (reversed)
• Modulation input: External analog; internal sine/square-wave (200 Hz to 300 kHz)
• Operating modes: CW, QCW
• Control modes: Constant Current, Constant Power
• Minimum output voltage drop: 1.5 V
• Noise and ripple: Specified in mA (5600 series standard)
• Temperature coefficient: Specified as ppm/°C FS
• Short-term stability: Specified as ppm FS (1 hour)
• Long-term stability: Specified as ppm FS (24 hours)
• Output current accuracy: ± (% reading + fixed error)
– Key Features
• 16-bit laser diode parameter access with full forward voltage characterization
• External analog modulation input for precision power and wavelength control
• Internal waveform modulator (sine/square, 200 Hz to 300 kHz)
• High-speed transient detection and multi-stage input filtering
• Independent output shorting circuits
• Slow turn-on sequence for safe diode initialization
– Typical Applications
• Scientific research requiring stable, characterized diode output
• Industrial laser systems with dynamic modulation demands
• Photonics test and characterization platforms
• Applications requiring sub-100 nA noise performance
– Compatibility & Integration
The 5600-20 is part of the Newport 5600 series family, which scales to higher currents (up to 65 A single-unit output; series operation up to 125 A CW / 220 A QCW across the family).
