Abstract

The variation of the feedback coupling coefficient in Ga_1−xAl_xAs distributed-feedback (DFB) lasers as a function of the Al concentration surrounding the GaAs optical confinement waveguide is considered. An optimum thickness for which the feedback coupling is maximum is determined for each transverse mode. The largest such maximum occurs for the lowest order mode. Fractional Al concentrations that yield symmetrical optical waveguides are found to be most effective in minimizing threshold current density, with the maximum Al concentrations being limited by doping and lattice mismatch considerations.

© 1975 Optical Society of America

Envelope Gain Saturation in Distributed-Feedback Lasers

K. O. Hill and A. Watanabe
Appl. Opt. 14(4) 950-961 (1975)

Gain saturation in distributed feedback lasers

H. A. Haus
Appl. Opt. 14(11) 2650-2652 (1975)

Transverse-mode stabilized Ga₁₋xAlxAs visible diode lasers

T. Kajimura, T. Kuroda, S. Yamashita, M. Nakamura, and J. Umeda
Appl. Opt. 18(11) 1812-1815 (1979)

GaAs optical waveguide structures at 10.6-μm wavelength

M. S. Chang, W. S. C. Chang, B. L. Sopori, H. R. Vann, M. W. Muller, M. G. Craford, D. Finn, W. O. Groves, and A. H. Herzog
Appl. Opt. 14(7) 1572-1578 (1975)

Mode Coupling Effects in Graded-Index Optical Fibers

Robert Olshansky
Appl. Opt. 14(4) 935-945 (1975)