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 telecommunication networks, these dual-channel instruments have features that make them easy to synchronize with other system elements for tight control over optical power measurements. The Model 2502 features a high speed analog output that allows using the L-I-V test system at the fiber alignment stage of the LDM manufacturing process. Through the use of buffer memory and a 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 and repeatability demands of continuous operation in round-the-clock production environments.