they are widely used in coherent detection applications for distributed fiber optic sensing, and in scenarios such as wind measurement radar.
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, in which the two photodiodes are matched to each other for excellent common mode rejection ratio
The BPD230 series balanced photodetectors utilize spatial light input and are suitable for coherent detection optics in spatial light paths.
Coherent Detection Module is mainly used for Distributed Fiber Optic Vibration / Acoustic Sound Detection (DVS / DAS) and wind measurement radar with high signal-to-noise ratio, high reliability and easy integration.