Discovery Semiconductors Inc. has introduced the model R205M balanced optical receiver for lidar and eye-safe free-space applications. This receiver has a wavelength range of 1.2 to 2.2 µm and operates at 150 MHz with a peak gain at 20 dB. The compact hermetic package includes matched InGaAs/InP photodiodes and a low-noise amplifier. It can be used in coherent lightwave link designs to eliminate laser relative intensity noise. The R205M is offered with a choice of optical input connectors and a type K or dual GPPO/SMMP coaxial RF output.