光纤光栅压力传感器

The research of FBG pressure sensing on the application of engineering

ABSTRACT

Fiber grating is one of the most rapid passive optical fiber components in recent years. Since 1978, the year when K.O.Hill and others first used the standing wave writing way in the germanium-doped fiber and make the world's first fiber grating, because of its’ many unique advantages, the use of the fiber grating in optical fiber communications Fields and fiber optic sensor Fields are broad prospected. With fiber grating manufacturing technology continues to improve, and the outcome of the application increasing, the fiber grating has been one of the most promising and representative optical passive components. The emergence of fiber grating makes many of the complex all-fiber communications and sensor networks possible, which greatly widened the scope of application of optical fiber technology.

As sensor component, fiber grating also possesses other special functions. For example, high ability of resisting electromagnetism disturb, small size and weight, high temperature-proof, high ability of multiplex, being liable to connect with fiber, low loss, good spectrum characteristic, erosion-proof, high sensitivity, being liable to deform and so on. At present, the sensor that adopts FBG (fiber Bragg grating) as sensor components has become the main stream of development and cultivation. Pressure is the direct cause of the drifting of the Bragg wavelength of the grating, so research on the FBG pressure sensing character in-depth is important to the FBG sensing technology.

The design is on the basis of understanding of FBG sensing elements; explore the using of FBG pressure character, so research on the FBG pressure sensing character in-depth is important to the FBG sensing technology. Bring forward a package project that can be used and the text.

1. Generally introducing the history of the development of the

optical fiber grating, the classification and the writing technology of the FBG. And the development and application of technology of the FBG sensing technology.

2. Analyzing the principal theory of FBG sensing, and

comprehensively analyzing the multiplexing techniques of fiber gratings such as WDM、TDM、SDM etc.

3．Studying the pressure sensing character of the bare grating and self-produced fiber grating pressure sensor. Expounding the theory and structure of packaging and doing the related experiment, we also analyzing the data and drawing the relevant conclusion on the experiment. In addition, the application of birefringence overcomes the cross-sensitization of temperature and pressure.

Key words: Optical Fiber Grating, Optical Fiber Bragg Grating, Sensing, Sensing Character, Pressure Sensing, Pressure

Sensing Character