Optical fiber sensor coil winding method implementing depolarization
An optical fiber sensing and winding method technology, applied in the field of coil winding, can solve the problems of increasing solder joints, weakening the signal-to-noise ratio, affecting the reliability and stability of the gyroscope, and improving the stability and improving the signal-to-noise ratio. , the effect of avoiding connection loss
Inactive Publication Date: 2008-07-16
ZHEJIANG UNIV
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[0014] 1) Determine the length of the single-mode fiber to be wound according to the fiber diameter, number of layers, inner radius and width of the fiber sensor coil to be wound, and determine the winding method according to the winding method of the fiber sensor coil to be wound. coordinates of the starting point.
[0015] 2) As shown in Figure 1, according to the length of the optical fiber, it is set to n sections, the ratio of the torsion of each section is N1, N2, ... Nn, one satisfies the number of layers and the winding method of the optical fiber sensing coil to be wound Twist the layers queues C1, C2, ... Cn to obtain the optical fiber twist rate N1 / C1, N2 / C2, ... Nn / Cn of each segment.
[0016] 3) According to the winding method of the optical fiber sensing coil, calculate the number of layers of the sensing coil where the segmentation points D2, D3, ---- are located.
[0017] 4) As shown in Figure 3, according to the winding method of the optical fiber sensing coi...
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The invention discloses a winding method of optical-fiber sensor coils which can implement depolarization. The optical-fiber sensor coil consists of a single-mode optical fiber which is tortile, and the torsion direction and scale of the optical fiber can be changed. The points which change in the optical fiber torsion direction are the cut points of D2, D3, etc., as well as the demarcation points between the layers of the optical-fiber sensor coils. The cut points of D2, D3, etc. divide the optical fibers D1Dn plus 1 which are used for winding the optical-fiber coil into n segments of tortile optical fibers D1D2, D2, D3, etc.; wherein, the torsion rate of any two segments of the tortile optical fibers is larger than 2 or smaller than 0.5. The winding method implements the depolarization of the optical-fiber sensor coil, simultaneously finishes the functions of a Loyt depolarizer and the optical-fiber sensor coil, simplifies system and improves stability; furthermore, as the Loyt depolarizer is not used, the invention reduces production cost and avoids the connection loss between the Loyt depolarizer and the optical-fiber sensor coil, thus being favorable for increasing the signal-to-noise rate of an application system.
Description
technical field [0001] The invention relates to a coil winding method, in particular to an optical fiber sensing coil winding method for realizing depolarization. Background technique [0002] The fiber optic gyroscope is an angular velocity sensor based on the Sagnac effect. By measuring the phase difference generated by two beams of light transmitted in opposite directions in the same fiber optic sensing coil, the angular velocity of the plane where the fiber optic gyroscope is located is determined. Interferometric fiber optic gyroscope technology is relatively mature, and can be made into products with various precisions. It is being gradually adopted and gradually replaced mechanical gyroscopes. The interferometric fiber optic gyroscope is composed of a light source, a beam splitter, a polarization control device, an optical fiber sensing coil, and a photoelectric detector. In order to ensure its measurement accuracy, the light transmitted in the optical fiber sensing ...
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Inventor 王冬云苑鲁超舒晓武刘承
Owner ZHEJIANG UNIV