Abstract
The output of a single-mode 633 nm He-Ne laser with internal mirrors is usually linearly polarized in one of two orthogonal directions. When the laser frequency is locked by injected light with the polarization axis of 45° for the direction, a change in the polarization state occurs at the frequency and the selected polarization remains even after the injection light is removed.1 This bistable behavior in polarization is based on intracavity anisotropies of loss and phase. We observed the dependence of the polarization switching on the angle of θ = 0°, 45° and 90° between one of the laser polarization and the linear-polarized injection light.
© 1995 IEEE
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