The Newport 1931-C is a single-channel optical power meter engineered for precise laser power measurement across the ultraviolet to infrared spectrum. It delivers calibrated results with true RMS measurement capability, peak-to-peak analysis, and DC source characterization. The instrument accommodates power levels from 11 femtowatts to 40 watts depending on detector selection, with sampling at 250 kHz and repetition rate handling up to 20 kHz.
Technical Specifications
Measurement Performance
• Power range: 11 fW to 40 W (detector-dependent)
• Sampling rate: 250 kHz
• Repetition rate capability: Up to 20 kHz
• DC accuracy: ±0.1% typical
• Peak-to-peak accuracy: ±1% typical
• Bandwidth (-3 dB): DC to 180 kHz (photodiode detectors)
Optical Capability
• Compatible detector wavelength range: 190–1800 nm
• Measurement modes: True RMS, peak-to-peak, DC
• Display units: Watts, dBm, dB, Amperes
Data & Display
• Internal storage: 250,000 data points
• 5.7″ graphical TFT LCD, ¼ VGA resolution
• Display formats: Numeric, graphic, bar charts, strip charts
• Analog bar graph with 10× zoom capability
• User-selectable display colors (6 options)
Signal Processing
• Analog and digital filtering
• Programmable input/output triggers with alarm levels
– Key Features
• Multiple analog output configurations: 0–0.5 V into 50 Ω; 0–1 V into 1 MΩ; 0–1 V into 50 Ω; 0–2 V into 1 MΩ; 0–2.5 V into 50 Ω; 0–5 V into 1 MΩ; 0–10 V into 1 MΩ
• USB data transfer: Up to 8 Mbps
• Temperature compensation via detector-integrated sensors
• Operating input: 90–240 VAC
– Compatibility & Integration
Direct compatibility with Newport 918D, 918L, and legacy 818 Series low-power detectors. An 841-DIN adapter enables use with 818/CM series detectors. DB15 connector interface. Computer control via USB and RS-232.
Physical
• Dimensions: 216 mm (W) × 133 mm (H) × 308 mm (D)
• Weight: 5.1 kg
• Operating environment: 10–40 °C, <80% RH
• Storage environment: -25–60 °C, <90% RH
