Interference type optical fiber gyroscope based on MZ interference principle
A fiber optic gyroscope and interferometric technology, which is applied to steering sensing equipment and other directions, can solve problems such as low optical power utilization, low signal-to-noise ratio, and interference, and achieve the effects of high cost performance, high sensitivity, and stable performance
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[0045] Reference figure 1 , Is a schematic structural diagram of a single-axis MZ interferometric fiber optic gyroscope according to an embodiment of the present invention. The invention adopts the principle of M-Z interference with two-arm symmetrical ring fiber (non-resonant), which is completely different from the principle of Sagnac interferometric fiber optic gyroscope and resonant fiber optic gyroscope. Laser 1 with a wavelength of 0.8μm~1.6μm emitted from the LD semiconductor laser enters the single-mode fiber F 1 After being 3db beam splitter 2SB 1 After splitting, they are sent to two optical fiber signal arms S with exactly the same length. 1 Port 1, 1′ and S 2 In ports 2, 2', the two optical fiber signal arms are wound into optical fiber coils 3 with the same winding method at the same center and diameter D, and the optical signals are respectively from S 1 Port 1'and S of the arm 2 The arm’s port 2 is input, the transmission direction ...
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