Low Driving Voltage Operation of MZI-Type EA Modulator Integrated with DFB Laser Using Optical Absorption and Interferometric Extinction

Yuta Ueda, Takeshi Fujisawa, Shigeru Kanazawa, Wataru Kobayashi, Kiyoto Takahata, Hiroaki Sanjoh, Hiroyuki Ishii, Masaki Kohtoku

研究成果: Article査読

7 被引用数 (Scopus)

抄録

We have developed a novel electroabsorption modulator (EAM)-integrated distributed feedback laser (EA-DFB laser), in which an EAM functioning as an external modulator is integrated in a Mach-Zehnder interferometer (MZI). The MZI-Type EAM (MZEA) modulates light intensity by both optical absorption and interferometric extinction. As a result, it improves the extinction ratio (ER) of a conventional EAM, which allows us to reduce the modulation voltage ( Vrm m}}), and thus reduce the power consumption of the driver circuit. A fabricated MZEA-integrated DFB laser (MZEA-DFB laser) exhibited high-ER operation and an output power of about 8 dBm, which is comparable to that of a conventional EA-DFB laser, with a 100-mA laser current. Thanks to the high ER and sufficient output power, the MZEA-DFB laser operating at half the Vrm m}} of a conventional EA-DFB laser is able to generate optical signals with a given optical modulation amplitude, and we achieved a 25.8-Gb/s 40-km transmission with the novel laser at a Vrm m}} of 1 {\rm V{pp}}.

本文言語English
論文番号7080894
ページ(範囲)195-200
ページ数6
ジャーナルIEEE Journal of Selected Topics in Quantum Electronics
21
6
DOI
出版ステータスPublished - 2015 11 1
外部発表はい

ASJC Scopus subject areas

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

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