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

Volume

19

Issue

8

fYear

2007

fDate

4/15/2007 12:00:00 AM

Firstpage

625

Lastpage

627

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.894939

Filename

4139642