High resolution inclinometer based on vertical pendulum and fiber Bragg grating Fabry-Perot cavity

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2018,（11）
• 页码范围: 27-30
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201816.110603

摘要

In this paper,an inclinometer based on a vertical pendulum and a fiber Bragg grating Fabry-Perot cavity (FBG-FP) is proposed.A low-damping rotation structure is used to reduce the mechanical frictions of the pendulum system and induce a wavelength shift of FBG-FPs.We find that the sensitivity can be maximized by optimizing the parameters of the inclinometer.Using a high-resolution demodulation system,a sensitivity of 179.9 pm/(°),and a resolution better than 0.02" can be achieved.Experiments also show that the proposed inclinometer has good linearity and repeatability.