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Proceedings Paper

Theory And Experiment On Distributed Feedback Lasers With Chirped Grating
Author(s): Akira Suzuki; Kunio Tada
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Paper Abstract

It is shown that small and gradual variations in the effective refractive-index or the grating period as little as 10-4 along the laser axis can have significant effects on the lasing characteristics of DFB (distributed feedback) lasers. Through numerical analyses based on the coupled-mode equations, it has been predicted that, in comparison with a DFB laser with uniform axial distribution of the effective refractive-index or the grating period, the axial-mode selectivity and the threshold gain of the lowest mode are much improved in a DFB laser with symmetric cosineor quadratic distribution and are much deteriorated in that with asymmetric linear distribution. Optically pumped GaAs DFB lasers with variable grating period have been fabricated by a new holographic interference technique, and experimental results consistent with the theoretical predictions are obtained.

Paper Details

Date Published: 25 February 1981
PDF: 9 pages
Proc. SPIE 0239, Guided Wave Optical and Surface Acoustic Wave Devices: Systems and Applications, (25 February 1981); doi: 10.1117/12.959182
Show Author Affiliations
Akira Suzuki, University of Tokyo (Japan)
Kunio Tada, University of Tokyo (Japan)

Published in SPIE Proceedings Vol. 0239:
Guided Wave Optical and Surface Acoustic Wave Devices: Systems and Applications
Chen S. Tsai, Editor(s)

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