Title :
Single-mode behavior of a circular grating for potential disk-shaped DFB lasers
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
fDate :
3/1/1990 12:00:00 AM
Abstract :
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
Keywords :
diffraction gratings; distributed feedback lasers; laser modes; reflectivity; refractive index; semiconductor junction lasers; central grating region; circular grating; fundamental mode wave; grating periodicity; grating position; index-step reflections; potential disk-shaped DFB lasers; reflections; reflectivity; refractive index step; resonance condition; superimposed in-phase reflections; wave impedance; Gratings; Laser modes; Laser theory; Optical propagation; Optical reflection; Optical resonators; Phased arrays; Power lasers; Reflectivity; Resonance;
Journal_Title :
Quantum Electronics, IEEE Journal of
