title: Laser-machined microcavities for simultaneous measurement of high-temperature and high-pressure.
abstract: Laser-machined microcavities for simultaneous measurement of high-temperature and high-pressure are demonstrated. These two cascaded microcavities are an air cavity and a composite cavity including a section of fiber and an air cavity. They are both placed into a pressure chamber inside a furnace to perform simultaneous pressure and high-temperature tests. The thermal and pressure coefficients of the short air cavity are ~0.0779 nm/°C and ~1.14 nm/MPa, respectively. The thermal and pressure coefficients of the composite cavity are ~32.3 nm/°C and ~24.4 nm/MPa, respectively. The sensor could be used to separate temperature and pressure due to their different thermal and pressure coefficients. The excellent feature of such a sensor head is that it can withstand high temperatures of up to 400 °C and achieve precise measurement of high-pressure under high temperature conditions.
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. ranzl@uestc.edu.cn.
authors.forename: Zengling
authors.initials: Z
authors.lastname: Ran
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. luoshucheng2008@126.com.
authors.forename: Shan
authors.initials: S
authors.lastname: Liu
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. ccliuq@gmail.com.
authors.forename: Qin
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. huangya500227@163.com.
authors.forename: Ya
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. edwardbao@sina.cn.
authors.forename: Haihong
authors.initials: H
authors.lastname: Bao
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. wangyanjun8801@163.com.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. luoshucheng2008@126.com.
authors.forename: Shucheng
authors.initials: S
authors.lastname: Luo
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. yanghq66@163.com.
authors.forename: Huiqin
authors.initials: H
authors.lastname: Yang
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), University of Electronic Science and Technology of China, Chengdu 611731, China. yjrao@uestc.edu.cn.
authors.forename: Yunjiang
authors.initials: Y
authors.lastname: Rao
mesh_terms: D004867:Equipment Design / Q000295:instrumentation* / Q000379:methods*; D019544:Equipment Failure Analysis / Q000295:instrumentation / Q000379:methods; D005336:Fiber Optic Technology / Q000295:instrumentation* / Q000379:methods*; D006358:Hot Temperature; D007834:Lasers; D011312:Pressure
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