Optical bistable laser diode and a method for controlling the sa

Coherent light generators – Particular active media – Semiconductor

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372 46, 372 50, H01S 319

Patent

active

050142801

ABSTRACT:
An optical bistable laser diode includes an elongated intrinsic active semiconductor element having upper and lower surfaces and a pair of spaced ends. A semiconductor clad layer is disposed on one of the surfaces of the semiconductor element and another semiconductor clad layer of a different conduction type is disposed on the other surface of the semiconductor element. One of the semiconductor layers is coextensive in length with the semiconductor element. The diode includes a mirror at each end of the semiconductor element presenting a resonator. The diode also includes first and second electrodes on the coextensive semiconductor layer. One electrode extends along the semiconductor layer from one end thereof for a distance L.sub.1. The other electrode extends along the semiconductor layer from the other end thereof for a distance L.sub.2. The electrodes are disposed in longitudinal alignment and the same are spaced apart a distance L.sub.3 presenting a gap therebetween defining a saturable absorption region in the active semiconductor layer. The distances L.sub.1, L.sub.2 and L.sub.3 are such that the same satisfy the relationship

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