A quaternary amplitude shift keying modulator for suppressing initial amplitude distortion

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

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)733-738
Number of pages6
JournalJournal of Lightwave Technology
Volume22
Issue number3
DOIs
Publication statusPublished - 2004 Mar 1
Externally publishedYes

Keywords

  • Amplitude distortion
  • Eye-opening penalty
  • Mach-Zehnder modulator (MZM)
  • Quaternary amplitude shift keying (4ASK)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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