The Laser Precision RK-5720/RK-570C is a dual-channel power meter and ratiometer engineered for precise laser power measurements across ultraviolet to far-infrared wavelengths and power levels spanning picowatts to kilowatts. The instrument accepts interchangeable pyroelectric, silicon, and thermopile probes—including RkP-500 and RkT Series models—enabling absolute radiometry, continuous-wave and average laser power measurement, and irradiance analysis. Integrated lock-in amplifier circuitry provides synchronous detection of chopped optical signals, significantly improving signal-to-noise ratio and background rejection. The RK-5720 model delivers simultaneous measurement of Channel A, Channel B, and their real-time ratio (B/A) with up to 12 decades of dynamic range for ratioing applications.
Technical Specifications
• Measurement Capabilities: Absolute radiometry, total laser power (CW and average), irradiance, dual-channel power measurement (RK-5720), real-time Channel A/B ratioing (RK-5720)
• Probe Compatibility: Pyroelectric, silicon, and thermopile types; RkP-500 and RkT Series compatible
• Power Range: Picowatts (pW) to kilowatts (kW)
• Spectral Coverage: Ultraviolet (UV) to far-infrared (far-IR)
• Synchronous Detection: Integrated lock-in amplifier with chopped signal detection; requires internal or external optical chopper
• Display: High-contrast backlit alphanumeric LCD with dual numeric/function keys; modes include Watts and dBm; bargraph for Channel A power
• Dynamic Range: Up to 12 decades (ratioing)
• Analog Outputs: 0-10 V DC (linear mode), -10 V to +10 V (logarithmic/dBm mode, representing -100 dBm to +100 dBm); Ratio Out 0-10 V DC (RK-5720)
– Key Features
• Background Cancel: Measures and subtracts ambient light interference to isolate source power
• Autorange: Automatic adjustment across wide fluctuating power ranges
• Variable Averaging: Fast (1 second) and Slow (10 second) modes
• User-Configurable Calibration Factors: Compensates for optical path non-linearities and wavelength response
• IEEE-488 GPIB Interface: Remote control and automated data acquisition
– Electrical Specifications
• Power Input: 110/220 V AC switchable, 50-60 Hz
– Compatibility & Integration
The RK-5720/RK-570C integrates with standard laboratory infrastructure via IEEE-488 GPIB connectivity and analog outputs. Multiple probe options and configurable measurement modes support diverse radiometric applications across industrial, research, and metrology environments.
