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Keithley 2500 Dual-Channel Optical Power Measurement Photodiode Meter Features: Dual-channel instrument for optical power measurements ±100 V photodetector bias capability Measure photodetector current from 1 fA to 20 mA 1 fA dark current measurement resolution Measure optical power directly when used with Model 2500INT (not included) Integrating Sphere User-programmable photodetector calibration coefficients 3000-point buffer memory on each channel allows data transfer after test completion Digital I/O and Trigger Link for binning and sweep test operations IEEE-488 and RS-232 interfaces Applications: Production test of: Laser diode modules Chip on submount laser diodes LEDs Passive optical components Laser diode bars Fiber alignment Description: Model 2500 and Model 2502 Photodiode Meters are designed to increase the throughput of Keithley's L-I-V (light-current-voltage_ test system for production testing of laser diode modules (LDMs). Developed in close cooperation with leading manufacturers of LDMs for fiberoptic telecom communication networks, these dual-channel instruments have features that make them easy to synchronize with other system elements for tight control over optical power measurements. Through the use of buffer memory and Trigger Link interface that's unique to Keithley instruments, the Model 2500 and Model 2502 can offer the fastest throughput available today for L-I-V testing of laser diode modules. These instruments are ruggedly engineered to meet the reliability repeatability demands of continuous operation in round-the-clock production environments.