Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
Opt Lett. 2011 May 1;36(9):1629-31. doi: 10.1364/OL.36.001629.
A photonic quantization approach to implementing analog-to-digital conversion (ADC) in the optical domain with differential encoding employing a phase modulator and delay-line interferometers (DLIs) is proposed and demonstrated. In the proposed ADC system, the phase-modulated signal is sent to an array of DLIs that have identical time delay difference, but different phase shifts, which are employed to achieve quantization with differential encoding. A proof-of-concept experiment is performed. The quantization of a 10 GHz sinusoidal signal with a bit length of 4 is experimentally demonstrated.
提出并演示了一种在光域中使用差分编码通过相位调制器和延迟线干涉仪（DLIs）实现模数转换（ADC）的光子量化方法。在所提出的 ADC 系统中，将相位调制信号发送到具有相同时间延迟差但不同相移的 DLI 阵列，用于实现差分编码的量化。进行了概念验证实验。实验演示了 4 位长度对 10GHz 正弦信号的量化。
