Showing papers on "Ring laser gyroscope published in 1968"

Differential laser gyro system

Abstract: A laser gyro employs both polarization anisotropy and directional anisotropy in the optical path so as to provide two laser gyros operating in the same cavity with cavity modes of different frequencies in the form of mutually opposite polarization (such as both right and left circularly polarized waves, or two waves of mutually perpendicular orientation), in each of the clockwise and counterclockwise directions. Two different species of lasing medium may be utilized so as to reduce interference and source depletion in supplying the four distinct effective frequencies across a wide range of operating conditions. Parameters are adjusted to maintain substantially the same change in oscillation frequency for variations in cavity tuning and other parameters for each of the four frequencies.

Externally biased ring laser

Abstract: Apparatus to bias a laser gyroscope in which a linear induction motor is positioned adjacent to one leg of the laser gyroscope so as to generate a moving magnetic field in the laser plasma. Such a field moves or pumps the plasma gas so as to present an apparent change in the index of refraction of the gas and an apparent change in path length to the two oppositely traveling beams.