We present a photonic approach for fast quantum random number generation based on optically sampled amplified spontaneous emission (ASE). This utilizes terahertz optical asymmetric demultiplexer to sample the ASE and then digitize pulses into bits using multi-bit parallel comparator. A proof-of-concept experiment demonstrates that 40 Gb/s with verified randomness can be obtained our method. The...

A compact acoustic waveguide demultiplexer configuration is studied via finite-element numerical modeling and audio frequency experiments. The consists of a Y-shaped with single input two outputs. narrow transmission bands created by stubs side-loaded on each output arm lead to selective certain frequencies. experimental work characterizes the broadband response along using an impulse method. F...

The terahertz optical asymmetric demultiplexer (TOAD) or semiconductor amplifier (SOA)-assisted Sagnac switches have been used to construct an all-optical 4-bit carry skip adder. This design aims satisfy the high speed and accuracy requirements of modern ultrafast digital transmission. Using a combination multiplexer full adder, we describe When compared ripple adder look-ahead may be employed ...