A quaternary amplitude shift keying modulator for suppressing initial amplitude distortion

Author

Nakamura, Takuya ; Kani, Jun-Ichi ; Teshima, Mitsuhiro ; Iwatsuki, Katsumi

Author_Institution

NTT Network Innovation Labs., Nippon Telegraph & Telephone Corp., Kanagawa, Japan

Volume

22

Issue

3

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

733

Lastpage

738

Abstract

This paper proposes a quaternary amplitude-shift-keying (4ASK) modulation circuit that suppresses amplitude distortion of the transmitting 4ASK signal. The performance of the proposed circuit is quantitatively verified through numerical calculation in comparison to a conventional alternative. The feasibility of the proposed circuit as integrated in a lithium niobate substrate is also demonstrated: the suppression of amplitude distortion is successfully demonstrated and minimum sensitivity of the transmitted 4ASK signal is 1.7 dB better than that offered by the conventional circuit.

Keywords

amplitude shift keying; electro-optical modulation; integrated circuit design; integrated circuit modelling; integrated optoelectronics; lithium compounds; modulators; optical communication equipment; optical distortion; substrates; LiNbO₃; Mach-Zehnder modulator; amplitude distortion; amplitude shift-keying modulation circuit; eye-opening penalty; lithium niobate substrate; quaternary amplitude shift keying modulator; sensitivity; Amplitude modulation; Amplitude shift keying; Bit rate; Circuits; Optical attenuators; Optical distortion; Optical filters; Optical modulation; Optical receivers; Optical sensors;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2004.824465

Filename

1281934