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Analysis of grating-coupled radiation in GaAs:GaAlAs lasers and waveguides - II: Blazing effects

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3 Author(s)
Streifer, William ; Palo Alto Research Center, Xerox Corporation, Palo Alto, CA, USA ; Burnham, R. ; Scifres, D.R.

Grating-coupled radiation in lasers and waveguides is analyzed for trapezoidal-shaped grating teeth which includes all triangular shapes. A perturbation technique is used which involves calculating the modes in a geometry with an inhomogeneous refractive index profile in the grating region. Curves are presented for radiated power from traveling waves as a function of blazing angle, grating tooth height, refractive index, and grating period. It is shown that the ratio of power radiated into the outer media depends greatly on tooth shape and size. By judiciously selecting parameters this ratio can exceed 50:1.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:12 ,  Issue: 8 )