The ILX Lightwave LDX3220 is a microprocessor-controlled laser diode driver engineered for precision current regulation and laser protection in scientific and industrial applications. It delivers stable, low-noise output across dual current ranges with integrated protection circuitry, four-wire forward voltage monitoring, and constant current or constant power operating modes. The instrument supports external modulation up to 1 MHz and includes GPIB/IEEE-488 remote control with LabVIEW driver support.
– Technical Specifications
Laser Current Control
• Output current ranges: 0–200 mA and 0–500 mA
• Current resolution: 4 µA (0–200 mA) and 10 µA (0–500 mA)
• Current accuracy: ±0.05% of full scale
• Short-term stability (1 hour): <10 ppm FS
• Long-term stability (24 hours): <20 ppm FS
• Output noise/ripple: 2 µA (rms, low bandwidth) and 4 µA (rms, high bandwidth)
• Transfer function: 50 mA/V
Laser Diode Protection
• Adjustable compliance voltage: 0–10 V (0–200 mA range) and 0 to –10 V (0–500 mA range)
• Clamping current limits for modulated operation
• Intermittent contact protection included
• Output shorting relays for safe switching
• Slow start routine to suppress turn-on transients
• Adjustable current and voltage limits
Forward Voltage Measurement
• Four-wire measurement configuration
• Accuracy: ±2.5% (forward voltage), ±2 mV (measurement)
• Resolution: 50 mV
Photodiode Monitoring
• Current range: 0–5000 µA
• Current accuracy: ±2 µA
• Reverse bias: 0–5 V
• Differential feedback topology
Modulation Capability
• External modulation: DC to 1 MHz (high bandwidth) and DC to 15 kHz (low bandwidth)
– Key Features
• Dual current ranges with independent resolution and accuracy
• Constant current and constant power modes with rear-facet photodiode feedback
• 5-digit green LED display readable with laser safety eyewear
• GPIB/IEEE-488 interface for remote instrument control
• LabVIEW driver support for virtual instrument development
– Typical Applications
Precision laser diode control in laboratory research, optical testing, wavelength-stabilized systems, and modulation-intensive industrial processes.
– Compatibility & Integration
GPIB/IEEE-488 connectivity enables integration into automated test systems. LabVIEW drivers streamline software development. Available in 120 VAC and 220 VAC configurations.
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