Patent ID: 7474406
Filing Date: 2009-01-06
Classification: G01C,H01S

Abstract:
1. A laser gyro comprising: an optical ring cavity, a solid-state amplifying medium and a feedback system, two optical modes propagating in opposite directions from each other inside said optical cavity, the feedback system slaving the intensity of the two counterpropagating modes: wherein the amplifying medium is anisotropic and wherein the feedback system includes, inside the cavity, an optical assembly comprising an optical element that acts on the polarization state of the counterpropagating modes and a rotor exhibiting a nonreciprocal effect that also acts on the polarization state of the counterpropagating modes, at least one of the effects of said optical element or of said rotor exhibiting an adjustable nonreciprocal effect, the feedback system being configured so that, if one of the optical modes has a light intensity higher than the other, its intensity is increased less by the amplifying medium so as to bring output modes to the same intensity level.