Optical waveguide sensor and preparation methods thereof
A manufacturing method and optical waveguide technology, applied to the coupling of optical waveguides, the use of optical devices to transmit sensing components, instruments, etc., can solve the problems of difficult resolution, low efficiency, and high cost of high-temperature optical fiber sensors, and achieve low production costs. high efficiency effect
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Embodiment 1
[0097] When the optical waveguide substrate 1 with the waveguide grating 3 becomes a packaged sensor 8 and is manufactured, one end is connected to an ordinary optical fiber 7 or a high-temperature-resistant optical fiber, and the other end is not connected to the optical fiber. After packaging, it is made A sensor can place a high-temperature-resistant optical waveguide device with a grating, such as a sapphire optical waveguide device with a grating, at a high temperature point as a high-temperature induction device. The temperature at a certain distance from the high-temperature area is lower, and it can An ordinary optical fiber 7 is used to transmit optical signals, and if it is in a high temperature area, a sapphire optical fiber can be used to transmit optical signals. An optical waveguide device with a grating, that is, a packaged sensor 8, is connected to a fiber coupler 9 through an optical fiber 7, and the other two ports of the fiber coupler 9 are respectively conne...
Embodiment 2
[0099] If both ends of the optical waveguide device with a grating are coupled to the optical fiber, the optical signal enters from one optical fiber and exits from the other optical fiber. This is the temperature of the optical waveguide device with a grating using a transmission method. As for the sensor device, the optical fiber can be an ordinary optical fiber, which is used in a low temperature area, or a sapphire optical fiber, which is used in a high temperature area.
Embodiment 3
[0101] Write gratings at different positions of an optical waveguide device with a linear waveguide structure, and the grating period at each position is different, forming a distributed optical fiber sensor system that can measure temperature or other physical quantities at different positions.
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