Lightwave modulation techniques for advanced modulation formats

Research output: Contribution to journalArticle

Abstract

Arbitrary waveform can be synthesized by two orthogonal components: in-phase and quadrature components. Thus, if we can manipulate the two components independently, various complicated modulation can be achieved. This technique is called vector modulation, which is commonly used in wireless radio communication systems where the carrier frequency is lower than 100GHz. On the other hand, in lightwave transmission systems, the carrier frequency is higher than 100THz, and the stability of the signal sources would be much poorer than in radio systems, so that the simplest modulation format (on-off-keying) was often used in commercial systems. However, recently, various modulation techniques such as quadrature amplitude modulation, etc., have been demonstrated by using precise and rapid lightwave control. In this report, we review recent progress in optical vector modulation technologies which can generate highspeed and complicated optical signals. Integrated optical modulators can synthesize multi-level signals in photonic circuits.

Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalChina Communications
Volume7
Issue number3
Publication statusPublished - 2010 Jul
Externally publishedYes

Fingerprint

Modulation
Radio communication
Light modulators
Radio systems
Quadrature amplitude modulation
Photonics
Communication systems
Networks (circuits)

Keywords

  • Integrated optical modulator
  • Photonic circuit
  • Vector modulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

Lightwave modulation techniques for advanced modulation formats. / Kawanishi, Tetsuya.

In: China Communications, Vol. 7, No. 3, 07.2010, p. 35-42.

Research output: Contribution to journalArticle

@article{b2fbd8262b04482fbb496586cb73c122,
title = "Lightwave modulation techniques for advanced modulation formats",
abstract = "Arbitrary waveform can be synthesized by two orthogonal components: in-phase and quadrature components. Thus, if we can manipulate the two components independently, various complicated modulation can be achieved. This technique is called vector modulation, which is commonly used in wireless radio communication systems where the carrier frequency is lower than 100GHz. On the other hand, in lightwave transmission systems, the carrier frequency is higher than 100THz, and the stability of the signal sources would be much poorer than in radio systems, so that the simplest modulation format (on-off-keying) was often used in commercial systems. However, recently, various modulation techniques such as quadrature amplitude modulation, etc., have been demonstrated by using precise and rapid lightwave control. In this report, we review recent progress in optical vector modulation technologies which can generate highspeed and complicated optical signals. Integrated optical modulators can synthesize multi-level signals in photonic circuits.",
keywords = "Integrated optical modulator, Photonic circuit, Vector modulation",
author = "Tetsuya Kawanishi",
year = "2010",
month = "7",
language = "English",
volume = "7",
pages = "35--42",
journal = "China Communications",
issn = "1673-5447",
publisher = "China Institute of Communication",
number = "3",

}

TY - JOUR

T1 - Lightwave modulation techniques for advanced modulation formats

AU - Kawanishi, Tetsuya

PY - 2010/7

Y1 - 2010/7

N2 - Arbitrary waveform can be synthesized by two orthogonal components: in-phase and quadrature components. Thus, if we can manipulate the two components independently, various complicated modulation can be achieved. This technique is called vector modulation, which is commonly used in wireless radio communication systems where the carrier frequency is lower than 100GHz. On the other hand, in lightwave transmission systems, the carrier frequency is higher than 100THz, and the stability of the signal sources would be much poorer than in radio systems, so that the simplest modulation format (on-off-keying) was often used in commercial systems. However, recently, various modulation techniques such as quadrature amplitude modulation, etc., have been demonstrated by using precise and rapid lightwave control. In this report, we review recent progress in optical vector modulation technologies which can generate highspeed and complicated optical signals. Integrated optical modulators can synthesize multi-level signals in photonic circuits.

AB - Arbitrary waveform can be synthesized by two orthogonal components: in-phase and quadrature components. Thus, if we can manipulate the two components independently, various complicated modulation can be achieved. This technique is called vector modulation, which is commonly used in wireless radio communication systems where the carrier frequency is lower than 100GHz. On the other hand, in lightwave transmission systems, the carrier frequency is higher than 100THz, and the stability of the signal sources would be much poorer than in radio systems, so that the simplest modulation format (on-off-keying) was often used in commercial systems. However, recently, various modulation techniques such as quadrature amplitude modulation, etc., have been demonstrated by using precise and rapid lightwave control. In this report, we review recent progress in optical vector modulation technologies which can generate highspeed and complicated optical signals. Integrated optical modulators can synthesize multi-level signals in photonic circuits.

KW - Integrated optical modulator

KW - Photonic circuit

KW - Vector modulation

UR - http://www.scopus.com/inward/record.url?scp=77956071991&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77956071991&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:77956071991

VL - 7

SP - 35

EP - 42

JO - China Communications

JF - China Communications

SN - 1673-5447

IS - 3

ER -