The DET30 bias photodetector is a compact, unamplified, fiber-optic input, battery-powered detector with very low noise, and can be used to detect optical signals with ps-level pulse widths.
APD20 series APD photodetector module, can detect near infrared light in the region of 400-1700nm with fiber coupling input, bandwidth from 10M to 400M. suitable for detecting nW level of optical power.
One photodetector module with 4/8/16 channels, compact size, easy integration, customized parameters
they are widely used in coherent detection applications for distributed fiber optic sensing, and in scenarios such as wind measurement radar.