Evaluation method of propagated optical wave for coherent optical transmission

Tsunehito Higashi, Makoto Tsubokawa, Nori Shibata, Shigeyuki Seikai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In coherent optical transmission systems using heterodyne detection for long-distance and high bit rate transmission, the quality coefficient (product of polarization coefficient and degree of coherence) was introduced to evaluate the propagated optical signal (POS). Relating this coefficient to the bit error rate in the ASK, FSK, and PSK optical transmission methods, the minimum received optical power needed to realize the coherent optical transmission system has been obtained as a function of the quality coefficient and the transmission bit rate. Next, analyzing the phase difference between the POS and local optical signal (LOS) caused by the length of the optical fiber, the chromatic dispersion, and the thermal characteristic of the optical fiber, it was found that the thermal characteristic of the optical fiber is an important factor in determining the degradation of coherence.

Original languageEnglish
Pages (from-to)69-79
Number of pages11
JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume71
Issue number8
Publication statusPublished - 1988 Aug
Externally publishedYes

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Light transmission
Optical fibers
Chromatic dispersion
Frequency shift keying
Phase shift keying
Bit error rate
Polarization
Degradation
Hot Temperature

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Evaluation method of propagated optical wave for coherent optical transmission. / Higashi, Tsunehito; Tsubokawa, Makoto; Shibata, Nori; Seikai, Shigeyuki.

In: Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi), Vol. 71, No. 8, 08.1988, p. 69-79.

Research output: Contribution to journalArticle

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