FIELD: physics, optics.
SUBSTANCE: present invention relates to devices for digitally processing information obtained from a gyrolaser (laser gyroscope). The disclosed gyrolaser with an optical cavity comprises a plurality of mirrors, at least one photodetector (101) outputting two optical signals (102, 103) with phase shift of 90°, said signals (102, 103) being digitised (401, 402), means (128) for controlling the position of one of said mirrors by converting an electrical signal into a mechanical force, means (135) for activating said gyrolaser in an oscillatory movement by converting an oscillation (306) the electrical signal into a mechanical force and means (118) for measuring the angular velocity (120) of said gyrolaser, the gyrolaser being characterised by that it additionally includes: means (405) for extracting the phase α and the modulus c or the square of the modulus c from said optical signals (102, 103); means (409) for automatic control of the length of the optical cavity; means (411) for differentiating said phase α over a given period of time in order to produce a signal (408) containing the overall movement information of said gyrolaser; and means (410) for automatic control of the activation of said gyrolaser on said oscillatory movement, receiving said signal (408), from which an estimate (300) of the oscillatory movement is extracted and imparted to said gyrolaser by said activation means (135), and producing said oscillation signal (306) whose amplitude is controlled according to a given amplitude value (129).
EFFECT: invention provides stability of the activation amplitude and improves systematic error characteristics of the gyrolaser.
15 cl, 4 dwg
