Coherent light generators – Particular active media – Semiconductor
Patent
1985-08-16
1988-06-14
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 18, 372 46, H01S 319
Patent
active
047517115
ABSTRACT:
A phased array laser having a laterally asymmetric variation in the gain or coupling of lasing elements of the array for emission in a single far field lobe. The lasing elements are confined by internal waveguide structuring, periodically spaced current confinement stripes, or by a hybrid of both waveguiding and current confinement. The widths, lengths, depths, or separations of the waveguides or stripes vary laterally across the array to affect the gain or coupling of the lasing elements. Alternate embodiments introduce lateral asymmetry in the active region or other layer thicknesses, doping, mirror facet reflectivities, A1 content of the layers, heat dissipation, or thicknesses of electrical contacts. The laterally asymmetric variations may be linear or nonlinear, monotonically increase from one edge to the other edge, or may be such that the relevant parameter is greatest or least in the center of the array.
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Cross Peter
Scifres Donald R.
Welch David
Davie James W.
Schneck Thomas
Spectra Diode Laboratories, Inc.
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