Apparatus and method for measuring spatial shape of three-core fiber based on stimulated Brillouin principle
A technology of stimulated Brillouin and three-core optical fiber, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of low measurement efficiency and no real-time measurement, and achieve long service life, light weight, and improved adaptability effect of ability
Inactive Publication Date: 2017-01-11
HARBIN INST OF TECH
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However, this method can only be manually measured point by point, the measurement efficiency is low, and it does not have the ability of real-time measurement
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[0021] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail:
[0022]A three-core optical fiber spatial shape measurement device based on the stimulated Brillouin principle, including a narrow bandwidth adjustable laser 11, a 50 / 50 optical coupler (A) 12, a 50 / 50 optical coupler (B) 13, an electro-optical modulation device (A) 14, electro-optic modulator (B) 15, erbium-doped fiber amplifier 16, 50 / 50 optical coupler (C) 17, optical circulator 18, multi-channel optical switch 19, balanced photodetector 114, 50 / 50 optical coupler (D) 115 and acousto-optic modulator 116, the narrow bandwidth tunable laser 11 and 50 / 50 optical coupler (A) 12, 50 / 50 optical coupler (A) 12 and 50 / 50 optical Coupler (B) 13 and electro-optic modulator (A) 14, electro-optic modulator (A) 14 and erbium-doped fiber amplifier 16, erbium-doped fiber amplifier 16 and 50 / 50 optical coupler (C) 17, 50 / 50 optical The coupler (B) 13 is con...
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The invention provides a device and method for measuring a three-core optical fiber space shape based on the stimulated Brillouin principle and belongs to the precision instrument manufacturing and measuring technology. According to the structure of the device, a three-core optical fiber fan-out machine is connected with a three-core optical fiber distribution sensor optical cable; the three-core optical fiber distribution sensor optical cable is composed of a three-core optical fiber, a protective sleeve and a high-reflecting silver film. A multi-path optical switch is connected with the three-core optical fiber distribution sensor optical cable and a reference optical fiber cable packaged for isolating external stress. A control computer is respectively communicated with an electro-optic modulator A, an electro-optic modulator B, the multi-path optical switch and a spectral analyzer. The spectral analyzer is connected with a balance photoelectric detector. The method for measuring the three-core optical fiber space shape based on the stimulated Brillouin principle comprises the steps that stimulated Brillouin scattering is achieved in a specific position through probe light and pump light and weak scattered light signals are detected through the coherent detection technology so that space shape measurement can be achieved. The device has the advantages of being unobvious in non-local effect, high in accuracy, insensitive to environment, capable of being attached to the surface of a detected component for real-time measurement and long in service life.
Description
technical field [0001] The invention belongs to precision instrument manufacturing and measurement technology, in particular to a three-core optical fiber spatial shape measurement device and method based on the stimulated Brillouin principle. Background technique [0002] With the continuous development of the aerospace industry, automobile industry, electronics industry, and cutting-edge industries, the demand for spatial shape measurement (3D surface shape measurement of complex surfaces, complex deformation of smart materials, etc.) has increased dramatically. Due to the limitation of measurement time and sampling point density, spatial shape measurement becomes very difficult, especially the changeable and harsh measurement environment makes the traditional spatial shape measurement method unable to meet the demand. In the past spatial shape measurement, the methods used more are template measurement method, structured light three-dimensional vision measurement method a...
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IPC IPC(8): G01B11/24
Inventor 崔继文冯昆鹏谭久彬
Owner HARBIN INST OF TECH