Wavelength-Tunable InGaAsP-InP Multiple-λ/4-Shifted Distributed Feedback Laser

Masayoshi Horita, Katsuyuki Utaka, Yuichi Matsushima

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A wavelength-tunable InGaAsP/InP multiple-λ/4-shifted distributed feedback (MQS-DFB) laser was demonstrated for the first time. A DFB laser with three λ/4-shifts and five electrodes was fabricated and its fundamental characteristics, such as tunability, spectral linewidth and FM response, were investigated. The stable single mode operation with an excellent SMSR of more than 40 dB was confirmed. Continuous wavelength tuning under constant output power mode was obtained with a range of 1.7 nm. Minimum spectral linewidth was 3 MHz at an output power of 20 mW. Flat FM response up to 4 GHz with an efficiency of about 0.65 GHz/mA was also obtained.

Original languageEnglish
Pages (from-to)1810-1816
Number of pages7
JournalIEEE Journal of Quantum Electronics
Issue number6
Publication statusPublished - 1993 Jun
Externally publishedYes

ASJC Scopus subject areas

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


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