In-Line Fiber-Optic Fabry-Perot Refractive-Indez Tip Sensors
We propose and demonstrate two novel in-line fiber-optic tip sensors for practical refractive-index (RI) measurement, which are based on an intrinsic Fabry-Perot interferometer (IFPI) formed by a section of conventional single-mode fiber or endlessly single-mode photonic crystal fiber (EPCF), respectively. Such an IFPI sensor has the advantages of easy fabrication, low joint and transmission losses, low-cost and good fringe visibility. Simultaneous measurement of RI and temperature can be realized by determination of the cavity length change and the fringe visibility of such an IFPI, respectively. In addition, it is found that the fringe visibility of the IFPI is insensitive to temperature change, providing a practical way to measure refractive index with self temperature compensation and offers a refractive-index resolution of～10-5 in its linear operating range. The experimental data agree well with the theoretical results.
Fiber optic sensor Fabry-Perot Interferometer Laser micromachining Photonic crystal fiber Refractive indez measurement
Yun-Jiang Rao
Key Lab of Broadband Optical Fiber Transmission & Communication Networks Technologies(Education Ministry of China), University of Electronic Science & Technology of China,Chengdu, Sichuan 610054, China Key Laboratory of Optoelectronic Technology and S
国际会议
第五届仪器科学与技术国际学术会议(ISIST 2008)Fifth International Symposium on Instrmentation Science and Technology
沈阳
英文
1-9
2008-09-15（万方平台首次上网日期，不代表论文的发表时间）