System and method for measuring light splitting ratio in a fiber ring/y-waveguide direct coupling module
A technology of coupling module and measurement system, which is used in measurement devices, mapping and navigation, gyroscope/steering sensing equipment, etc., can solve problems such as inability to apply and cannot measure spectroscopic ratio parameters, and achieves high accuracy, convenient adjustment, and operation. convenient effects
Active Publication Date: 2020-07-14
HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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Problems solved by technology
The method of the technical solution of the present invention, aiming at the situation that the Y-waveguide splitting ratio of the prior art cannot be applied to the fiber ring / Y-waveguide direct coupling module, adopts the method of measuring the optical power change of the interference optical signal formed by the interference of the split beams of the Y-waveguide, which can be Solve the problem that the splitting ratio parameter cannot be measured in the direct coupling module
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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other. The present invention will be further described in detail below in combination with specific embodiments.
[0048] In the embodiment of the technical solution of the present invention, a measurement device and a measurement method of a fiber ring / Y waveguide direct coupling module are proposed, which solves the problem that the splitting ratio cannot be measured in the fiber ring / Y waveguide direc...
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The invention discloses a splitting ratio measurement system in a fiber ring / Y waveguide direct coupling module. The measurement system comprises a light source, a polarization maintaining fiber beam splitter, the fiber ring / Y waveguide direct coupling module, and an optical power meter; the light source, the polarization maintaining fiber beam splitter and the fiber ring / Y waveguide direct coupling module are connected in order, the optical power meter and the signal output part of the polarization maintaining fiber beam splitter are connected, and a modulation circuit is effected on the Y waveguide in the fiber ring / Y waveguide direct coupling module for modulation of a phase of an optical signal; and by measuring the interference optical signal optical power change formed by optical signal interference by the Y waveguide, the splitting ratio of the Y waveguide can be calculated. The invention also discloses a method for measuring the splitting ratio in the fiber ring / Y waveguide direct coupling module. The apparatus and method in the invention employ the method for measuring interference optical signal optical power change formed by optical signal interference by the Y waveguide, which solve the problem of difficult measurement of splitting ratio parameters in a direct coupling module.
Description
technical field [0001] The invention belongs to the field of optical fiber gyroscope optical paths, and in particular relates to a system and method for measuring light splitting ratio in an optical fiber ring / Y waveguide direct coupling module. Background technique [0002] Fiber optic gyroscope is an inertial instrument based on the Sagnac effect. It has the advantages of small size, light weight, wide range of accuracy, and no moving parts. In recent years, it has been widely used in inertial navigation in land, sea, air, and space. Applications. As the most important sensitive and detection part of the Sagnac effect, the gyro optical path is the core component of the fiber optic gyro. In general, the fiber optic gyro optical path includes five components: light source, coupler, Y waveguide, fiber optic ring, and detector. The Y waveguide and fiber optic ring are usually connected by pigtail fusion. In the prior art, CN104316003 discloses a technical solution for direct...
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IPC IPC(8): G01C25/00G01C19/72
CPCG01C19/725G01C25/00
Inventor 王学勤胡如芝郭礼芹
Owner HUBEI SANJIANG AEROSPACE HONGFENG CONTROL