Performance-Enhanced Optical Quantizer by Using a Shape Optimization Method

We demonstrate a performance-enhanced optical quantizer by utilizing a shape optimization method. Simulation results show that the insertion loss is optimized from 0.22 dB to 0.1 dB, and the uniformity is optimized from 0.52 dB to 0.1 dB at 1550 nm. The effective number of bits (ENOB) is more than 3.2 bit over a large bandwidth of 80 nm (1518-1598 nm).