Longitudinal Mode Behaviors of 1.5 μm Range GalnAsP/lnP Distributed Feedback Lasers

Yoshio Itaya, Takashi Matsuoka, Koichi Kuroiwa, Tetsuhiko Ikegami

研究成果: Article査読

37 被引用数 (Scopus)


Longitudinal mode behaviors of asymmetric structure distributed feedback buried heterostructure (DFB-BH) lasers are examined theoretically and experimentally. A 1.5 μm range GalnAsP/lnP DFB-BH laser was fabricated by a three-step LPE growth process. We measured the stopband in the spectrum of the DFB laser. It was found that no resonance mode emission occurred in the gain spectrum and its spectrum was asymmetric with respect to the Bragg wavelength. Most of the lasing power concentrated on the DFB mode adjacent to the stopband which was determined by the Bragg condition. The measured spectrum was explained by the calculated results of the coupled wave theory with external reflectors. The asymmetric spectrum was caused by the relative position of the cleaved facet on the corrugation grating. It was shown that the asymmetric structure DFB laser, which consisted of two end facets with different reflection coefficients, gives a stable single longitudinal mode. There was no mode jump up to 2.3 times threshold. At a modulation depth of 100 percent, the ratio of the highest nonlasing mode intensity to the lasing DFB mode was estimated to be -16.0 dB.

ジャーナルIEEE Journal of Quantum Electronics
出版ステータスPublished - 1984 3

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 凝縮系物理学
  • 電子工学および電気工学


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