Ophir-Spiricon LLC’s Laser Measurement Group has announced the FPS-1, a fast photodetector designed to measure the temporal pulse shape of lasers or other light sources. A high-speed photodiode sensor with a wide spectral response, it provides 1-ns response time and accommodates wavelengths from 190 to 1100 nm. Compact, easy to use and flexible, it offers two modes of operation: the 50-Ω load measures nanosecond high-peak power pulses, while the 10-KΩ load measures longer and lower peak power pulses. Input can be direct beam or from a fiber connection. Neutral density filters are available to adjust the sensitivity to the power level of the source, or the user can adjust the input intensity to the level appropriate for the detector by scattering the laser light off a white matte surface and backing off until the appropriate intensity is reached.