Dual sensing receiver structure for halving the amplifier contribution to the input equivalent noise of an opto-electronic receiver

A generic opto-electronic receiver structure, is analysed and conditions are specified which, when valid, result in a receiver with double the signal to noise ratio of a standard optoelectronic receiver. Experimental results from a high-gain, low-bandwidth, transimpedance amplifier are presented to verify the theory and to show that this performance level can be attained. It is shown that the bandwidth and overload sensitivity of the dual sensing optoelectronic receiver can be comparable with that of a standard receiver