Ring laser gyroscope

Details Ring laser gyroscope Ring laser gyroscope

H - Electricity

01

S

345/10

H01S 3/083 (2006.01)

Patent

CA 1103793

GCD-75-17 ABSTRACT OF THE DISCLOSURE Disclosed herein is a ring laser gyroscope of the type which operates with four circularly polarized beams at four mutually distinct frequencies, with two oppositely circularly polarized beams propagating in one direction and the two other oppositely circularly polarized beams propagating in the opposite direction. The ring laser gyroscope comprised two different gas isotopes as the active components of the laser gain medium, there being provided means for applying a magnetic field, whose direction substantially coincides with the beam directions, to the gain medium, i.e. the two gas isotopes, suitably in the form of DC current-carrying coils wound around the tube containing the gain medium, thereby to generate las- ing action at the four frequencies. The complete gyro- scope includes means for detecting beat frequencies re- sulting from combining the beams and means receiving the output from the detecting means for generating output sig- nals which are representative of rotational displacement of the ring laser gyroscope.

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