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Multiple-Phase-Shift Super Structure Grating DBR Lasers
Hiroyuki ISHII Yuichi TOHMORI Fumiyoshi KANO Yuzo YOSHIKUNI Yasuhiro KONDO
IEICE TRANSACTIONS on Electronics
Publication Date: 1993/11/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
semiconductor, laser diode, distributed Bragg reflector, wavelength tuning,
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This paper reports on broad-range wavelength tuning characteristics of DBR lasers which make use of a newly proposed multiple-phase-shift super structure grating (SSG). The reflection characteristics of the SSG reflector are analyzed theoretically. We found that the SSG reflector has periodic sharp reflection peaks each with high reflectivities thus making it a suitable wavelength selective reflector for single-mode lasers. The expected characteristics were evident in multiple-phase-shift SSGs fabricated using a new method which involves multiple-phase-shift insertion. DBR lasers with multiple-phase-shift SSGs were fabricated and their wavelength tuning characteristics were studied. The maximum tuning range is 105 nm in the single longitudinal mode under a CW condition. Dynamic single mode operation was also observed throughout the tuning range.