Title :
All-Optical Analog-to-Digital Conversion Based on Polarization-Differential Interference and Phase Modulation
Author :
Li, Wangzhe ; Zhang, Hongming ; Wu, Qingwei ; Zhang, Zhuangqian ; Yao, Minyu
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
fDate :
4/15/2007 12:00:00 AM
Abstract :
A novel approach of an all-optical analog-to-digital converter is proposed and demonstrated. One single-phase modulator and a continuous-wave laser diode are used to quantize the sinusoidal tone analog signal. Software sampling measurements yielded an effective number of bits of 4.1. Benefits of the proposed setup are its simple design, high bandwidth, and stability. The scheme is primarily limited in the optical domain by the speed of the phase modulator and in electronic domain by electrical comparators and logic devices
Keywords :
analogue-digital conversion; light interference; light interferometry; optical modulation; phase modulation; semiconductor lasers; analog-to-digital conversion; electrical comparators; logic device; phase modulation; polarization-differential interference; Analog-digital conversion; Bandwidth; Diode lasers; Interference; Optical devices; Phase modulation; Polarization; Sampling methods; Software measurement; Stability; Optical interferometry; phase modulation; photonic analog-to-digital converter (ADC); photonic sampling;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.894939
