The Newport 1825-C Optical Power/Energy Meter is a benchtop instrument for measuring optical power and energy across DC, AC peak-to-peak, pulsed, and integrated exposure applications. Its compatibility with Newport’s Low-Power, High-Power, and Energy detector families eliminates the need for multiple single-purpose meters, serving both laboratory and industrial environments with annunciated digital and analog displays and straightforward front-panel operation.
Technical Specifications
Measurement modes include CW power, AC peak-to-peak power, pulsed power, and integrated energy exposure. Display resolution reaches full-scale measurement divided by 2000. Minimum pulse slope is 10 V/sec.
Detector responsivity ranges span:
• Semiconductor: 1 × 10² A/W to 1 × 10⁻⁸ A/W
• Thermopile: 1 × 10⁻⁵ V/W to 1 × 10⁻⁵ V/W
• Pyroelectric: 1 × 10⁷ V/J to 1 × 10⁻³ V/J
Maximum measurable inputs include 10 mA for semiconductor detectors, 2 V for thermopile detectors, and 200 V for pyroelectric detectors. Semiconductor analog output bandwidth extends to 150 kHz.
The instrument operates via AC adapter with rechargeable battery pack. Shock hazard exists when voltages exceed 42 VDC or 42 V peak AC between the instrument, detector, probe, and earth ground.
– Key Features
• Mode selection for CW, AC peak-to-peak, pulsed, and integrated exposure measurement
• Range selection and zero adjustment controls
• Signal averaging feature with adjustable low-pass filter for noisy or fluctuating signals in PULSE or peak-to-peak modes (disabled in CW)
• Calibration factor mantissa entry and exponent adjustment via rotary dip switch
• Setup dip switches for configuration
• NIST-traceable accuracy and calibration
– Typical Applications
Optical power characterization across multiple measurement domains: continuous-wave laser output, modulated signal peak-to-peak analysis, pulsed laser energy quantification, and cumulative exposure measurement.
– Compatibility & Integration
The 1825-C accepts Newport’s entire Low-Power, High-Power, and Energy detector portfolio, accommodating semiconductor, thermopile, and pyroelectric sensor technologies within specified responsivity limits.
