Method for inhibiting front polarizing noise of Y-wave guide in optical fiber gyro

The invention provides a method for inhibiting the front polarizing noise of a Y-wave guide in an optical fiber gyro. The method comprises the steps of: using a fast axis polarizing mode (two polarizing modes of light waves emitted by a light source) by the Y-guide wave; selecting the polarizing mode transmitted along the fast axis as a probe signal; and probing rotary information of an optical loop circuit. The method for inhibiting the front polarizing noise of the Y-wave guide in the optical fiber gyro provided by the invention, the performance of the optical fiber gyro is effectively improved. With the adoption of the method for inhibiting the front polarizing noise of the Y-wave guide in the optical fiber gyro provided by the invention, the front polarizing noise of the Y-wave guide of the optical fiber gyro is effectively inhibited, the output stability of the optical fiber gyro is improved, the yield of the optical fiber gyro is improved, and the cost of the optical fiber gyro is lowered.