Distributed Feedback InGaAsP/lnP Lasers with Window Region Emitting at 1.5 μm Range

Shigeyuki Akiba, Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


Distributed feedback (DFB) InGaAsP/InP lasers with a window region formed at an end of the corrugated DFB region were made in order to overcome the problems inherent in the previous structures of DFB lasers with cleaved, sawed, etched, or AR-coated facets, or with an unexcited corrugation region. The window structure DFB lasers showed linear current versus output J-L) curves, in contrast to those with a hysteresis or a kink appearing in a DFB laser with an unexcited region. Suppression of Fabry-Perot (F-P) resonances due to the two facets were sufficient enough to keep a single longitudinal mode property by DFB up to high excitation level. CW operation up to 65°C was achieved at the 1.5 μm wavelength range. Axial modes concerning the corrugated resonator were measured at about the threshold current. A stop band of a DFB laser was clearly observed with two dominant modes and much smaller submodes, which almost agreed with the axial modes predicted from a basic DFB theory.

Original languageEnglish
Pages (from-to)1052-1056
Number of pages5
JournalIEEE Journal of Quantum Electronics
Issue number6
Publication statusPublished - 1983 Jun
Externally publishedYes

ASJC Scopus subject areas

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


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