The 1004, 40 GHz GaAs Fiber-Optic Detector makes ultra high-speed measurements in the 400-870 nm wavelength range easy. The self-contained module connects directly to test instruments like digital oscilloscopes, spectrum analyzers, and network analyzers for lightwave time- and frequency-domain measurements. They accept single-mode fiber-optic inputs from your optical apparatus, eliminating the need for lossy and dispersive high-frequency coaxial cables. The internal housing of the high-speed models is specially designed to preserve the frequency response and phase to give true fidelity in your measurements. It has a FC single-mode input and Wiltron K electrical output.