5-Gb/s performance of integrated light source consisting of λ/4-shifted DFB laser and EA modulator with SI InP BH structure

Hideaki Tanaka, Masatoshi Suzuki, Masashi Usami, Hidenori Taga, Shu Yamamoto, Yuichi Matsushima

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The fabrication process and characteristics, including 5-Gb/s transmission, of an integrated light source consisting of a Agl/4-shifted distributed feedback laser and an electroabsorption (EA) modulator are discussed. By introducing a semi-insulating (SI) InP on the butt-joint region, both the large electrical isolation resistance (>10 MΩ) between the laser and the modulator and a high optical coupling efficiency (>80%) between them are achieved. A typical threshold current was 50-70 mA, and single-mode operation at 1.576 μm was maintained up to 5.5-mW output power. The modulation voltage to swing between 90% transmission and 10% transmission was 6.2-12V, depending on the modulator length in the range 1000-400 μm. The 3-dB bandwidth is 7.7 GHz and a linewidth enhancement factor (α) of 0.9 is estimated from the sideband-to-carrier ratio of the spectra. A 5-Gb/s NRZ (1,0) pattern is transmitted through 73-km conventional fiber with a dispersion of 1467 ps/nm, and no error floor was observed. The α value is estimated to be between 0 and 1 from the transmission data, and good agreement with that from the sideband-to-carrier ratio was obtained.

Original languageEnglish
Pages (from-to)1357-1362
Number of pages6
JournalJournal of Lightwave Technology
Volume8
Issue number9
DOIs
Publication statusPublished - 1990 Sep
Externally publishedYes

Fingerprint

Electroabsorption modulators
Distributed feedback lasers
Light sources
modulators
light sources
sidebands
Modulators
butt joints
lasers
optical coupling
Acoustic impedance
distributed feedback lasers
data transmission
threshold currents
Linewidth
Data communication systems
isolation
Modulation
bandwidth
Bandwidth

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

5-Gb/s performance of integrated light source consisting of λ/4-shifted DFB laser and EA modulator with SI InP BH structure. / Tanaka, Hideaki; Suzuki, Masatoshi; Usami, Masashi; Taga, Hidenori; Yamamoto, Shu; Matsushima, Yuichi.

In: Journal of Lightwave Technology, Vol. 8, No. 9, 09.1990, p. 1357-1362.

Research output: Contribution to journalArticle

Tanaka, Hideaki ; Suzuki, Masatoshi ; Usami, Masashi ; Taga, Hidenori ; Yamamoto, Shu ; Matsushima, Yuichi. / 5-Gb/s performance of integrated light source consisting of λ/4-shifted DFB laser and EA modulator with SI InP BH structure. In: Journal of Lightwave Technology. 1990 ; Vol. 8, No. 9. pp. 1357-1362.
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