Gigahertz-Optik introduced the ISD-1.6-Si-1 and ISD-1.6-Si-FC-1 radiant power detector featuring a compact 16 mm diameter integrating sphere for beam emitter type light sources like laser diode dyes and optical fibers. The small footprint 43.5 mm x 25 mm x 17.5 mm size detector’s primary function is to fit inside existing equipment and tight enclosed spaces to measure beam power through its 3mm measurement port. The silicon photodiode detector offers a wide spectral range from 400 nm to 1100 nm and a typical absolute sensitivity of 200 µA/W at 63 0nm (500 mW max power). The detector head is traceably calibrated and certified to international standards. The ISD-1.6-Si-FC-1 model includes a FC connector to allow connection of a spectrometer in case spectral data is required. The FC connector is mounted opposite the measurement port to collect the maximum amount of light signal for high resolution spectrometers with limited sensitivity. A near-infrared version with an InGaAs photodiode to cover the 800 nm to 1700 nm spectral range is also available.