lambda /4-SHIFTED InGaAsP/InP DFB LASERS.

Katsuyuki Utaka, Shigeyuki Akiba, Kazuo Sakai, Yuichi Matsushima

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

The effects of reflectivities at the end of the distributed-feedback (DFB) region and of a lambda /4-shift position are compared theoretically in terms of stability of single-longitudinal-mode operation and asymmetric power distribution. The shift of the lambda /4-shift position from the center to a certain place in the DFB region, with the end reflectivities less than several tenths of a percent, is most effective for efficient power extraction and reproducible dynamic-single-mode (DSM) operation. Devices emitting at 1. 5 mu m range were fabricated by using negative and positive photoresists and using one-step holographic exposure. They exhibited single-longitudinal-mode operations just at or near the center of the stopband, i. e. , the Bragg wavelength. Slight wavelength deviations from the center are attributed to the accidental variations of phase shift from the optimal value.

Original languageEnglish
Pages (from-to)1042-1051
Number of pages10
JournalIEEE Journal of Quantum Electronics
VolumeQE-22
Issue number7
Publication statusPublished - 1986 Jul
Externally publishedYes

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Wavelength
shift
Photoresists
Phase shift
reflectance
photoresists
wavelengths
phase shift
deviation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Utaka, K., Akiba, S., Sakai, K., & Matsushima, Y. (1986). lambda /4-SHIFTED InGaAsP/InP DFB LASERS. IEEE Journal of Quantum Electronics, QE-22(7), 1042-1051.

lambda /4-SHIFTED InGaAsP/InP DFB LASERS. / Utaka, Katsuyuki; Akiba, Shigeyuki; Sakai, Kazuo; Matsushima, Yuichi.

In: IEEE Journal of Quantum Electronics, Vol. QE-22, No. 7, 07.1986, p. 1042-1051.

Research output: Contribution to journalArticle

Utaka, K, Akiba, S, Sakai, K & Matsushima, Y 1986, 'lambda /4-SHIFTED InGaAsP/InP DFB LASERS.', IEEE Journal of Quantum Electronics, vol. QE-22, no. 7, pp. 1042-1051.
Utaka K, Akiba S, Sakai K, Matsushima Y. lambda /4-SHIFTED InGaAsP/InP DFB LASERS. IEEE Journal of Quantum Electronics. 1986 Jul;QE-22(7):1042-1051.
Utaka, Katsuyuki ; Akiba, Shigeyuki ; Sakai, Kazuo ; Matsushima, Yuichi. / lambda /4-SHIFTED InGaAsP/InP DFB LASERS. In: IEEE Journal of Quantum Electronics. 1986 ; Vol. QE-22, No. 7. pp. 1042-1051.
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