Abstract

The all-optical control of the polarization in a vectorial bistable monomode laser by injection with a second laser is analyzed theoretically and performed experimentally. The polarization is shown to switch following either an externally induced rotation or an externally induced inhibition mechanism. The usual theory of scalar-locking phenomena is extended to vectorial systems. We show that there is a single locking range in the induced rotation process occurring for low phase anisotropy values, whereas there are two distinct locking ranges in the induced inhibition process for higher anisotropy values. The theoretical results are in good agreement with experiments realized with 3He–20Ne lasers. By scanning the injected signal frequency, optical gates with high signal-to-noise ratios are experimentally obtained.

© 1993 Optical Society of America

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