Index-guided arrays of Schottky barrier confined lasers

Temkin, H.; Logan, R. A.; van der Ziel, J. P.; Reynolds, C. L.; Tharaldsen, S. M.
March 1985
Applied Physics Letters;3/1/1985, Vol. 46 Issue 5, p465
Academic Journal
We describe simple, self-aligned, index-guided arrays containing up to 10 ridge waveguide lasers. The Ohmic contact and current confining Schottky barrier are provided by a single broad area metallization. This technique requires only a single growth on a planar (100) substrate and is compatible with all epitaxial growth techniques. Using conventional liquid phase epitaxy of GaAlAs we have obtained astigmatism-free arrays with threshold current as low as 20–30 mA per laser and power output linear to 300 mW/facet at temperatures as high as 100 °C, with the temperature dependence characterized by a large T0 of 240 °C. High optical quality of the output beam is demonstrated by very smooth and narrow far-field patterns, both in the phase-coupled and un-coupled extremes of the waveguide separation.


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