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Single-mode behavior of a circular grating for potential disk-shaped DFB lasers

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1 Author(s)
Toda, M. ; David Sarnoff Res. Center, Princeton, NJ, USA

The reflectivity and the resonance condition of a circular grating for a disk-shaped distributed-feedback (DFB) laser are calculated. The periodicity and the position of the grating are so chosen that all of the reflections from each refractive index step are superimposed in-phase so as to be consistent with the resonant behavior of the fundamental mode wave. The calculated wave impedance (E/H ) is almost purely imaginary in the central region of the grating for the higher modes

Published in:

Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 3 )