Y-Junction and Misaligned-Stripe Diode Laser Arrays with Nonuniform Reflective Diffraction Coupler
Journal
IEEE Journal of Quantum Electronics
Journal Volume
25
Journal Issue
4
Pages
689-695
Date Issued
1989
Author(s)
Abstract
Two new diode laser arrays, i.e., Y-junction and misaligned-stripe arrays employing a nonuniform reflective diffraction coupler, have been investigated both theoretically and experimentally. These two structures are analyzed using diffraction theory based on a scattering matrix representation. In the analysis, the threshold behavior, mode distribution, and stability of the array modes are calculated as a function of various array structures. The oxide-restricted ridge waveguide laser is chosen as the basic laser structure in this work and a simple fabrication process is developed. It is found that the output peak-power per facet for a 10-element Y-junction array without coating is over 800 mW and the total differential quantum efficiency reaches 70 percent. The misaligned-stripe laser also exhibits high power of 500 mW per facet and high quantum efficiency of 60 percent. The fundamental mode operation is achieved for both lasers. © 1989 IEEE
SDGs
Type
journal article