Improvement of Photonic ADC Based on Phase-Shifted Optical Quantization by Using Additional Modulators

Author

Wang, Yang ; Zhang, Hongming ; Wu, Qingwei ; Yao, Minyu

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

24

Issue

7

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

566

Lastpage

568

Abstract

An improvement of a photonic analog-to-digital converter based on phase-shifted optical quantization (PSOQ) is presented and verified. The resolution can be increased by employing an additional Mach-Zehnder modulator (MZM) to combine with the PSOQ scheme. The improved scheme with a quantization level of 32 (corresponding quantization bit number is 5 bits) is experimentally demonstrated by using two LiNbO₃ modulators, and the experimental result with the effective number of bits 4.23 is obtained.

Keywords

Mach-Zehnder interferometers; analogue-digital conversion; integrated optics; lithium compounds; optical information processing; optical modulation; optical phase shifters; LiNbO₃; Mach-Zehnder modulator; analog-to-digital converter; phase-shifted optical quantization; photonic ADC; quantization bit number; Analog-digital conversion; Optical interferometry; Optical modulation; Optical polarization; Phase modulation; Photonics; Quantization; Mach–Zehnder modulator; phase modulator; 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.2012.2183634

Filename

6127902