Co-design of Transimpedance Amplifiers and Photonic Quantum Random Number Generators

We investigate the photonic and electronic elements of a quantum random number generator based on vacuum state homodyne detection. We account for photodiode responsivity, optical beam splitting ratio, and optical path length in balancing the detector's photocurrents. Finally, the quantum to classical noise ratio is increased through the design of an operational amplifier, including its common mode rejection ratio, bandwidth, gain, and classical noise. A quantum to classical noise ratio of. 064 is achieved and the result is analyzed for improvement in future work.