Laser-welding fiber grating surface temperature sensor and packaging method thereof
A fiber grating, laser welding technology, applied in the direction of thermometers, thermometers, instruments, etc. with physical/chemical changes, can solve the problems affecting the natural thermal expansion of metal substrates and fiber gratings, easy creep and aging, fiber grating center wavelength shift, etc. problems, to achieve the effect of improving long-term reliability and stability, overcoming creep and aging, and reducing contact thermal resistance
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[0029] The present invention will be further described below in conjunction with specific examples and drawings.
[0030] figure 1 Is a schematic structural diagram of an embodiment of the present invention, figure 2 for figure 1 A-A section view, image 3 for figure 1 The B-B section view, Figure 4 for figure 1 Bottom view of a laser-welded fiber grating surface temperature sensor, including an optical fiber, a metal substrate 6 and a bottomless non-metal frame 1. The optical fiber includes a metal-plated fiber grating 4 and located on both sides of the fiber grating The two ends of the fiber grating 4 coated with a metal layer are fixed on the metal substrate 6 by laser welding, and the signal transmission pigtail is covered with a fiber protection sleeve 8; the bottom of the non-metal frame 1 is connected to the metal The substrate 6 is fixed, and the non-metal frame 1 is provided with a through hole for the fiber protection sleeve 8 to pass through, and the inside of the no...
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