All optical analog-to-digital conversion makes use of photonic technologies to sample and quantize the electrical analog signal, which has the potential to realize high sampling rate and high resolution at the same time. It is a promising technology to break through the bottleneck of electronic ADCs. 全光模数转换利用光子技术实现对模拟电信号的采样及量化,可以在实现超高采样率的同时,得到高量化精度,是突破电子ADC瓶颈的有效手段。