W. TalataisongD. N. WangR. ChitareeC. R. LiaoC. WangaHong Kong Polytechnic UniversityMahidol UniversityShenzhen UniversityChina Jiliang University2018-11-232018-11-232015-01-01Proceedings of SPIE - The International Society for Optical Engineering. Vol.9634, (2015)1996756X0277786X2-s2.0-84946122981https://repository.li.mahidol.ac.th/handle/123456789/35855© 2015 SPIE. A fiber in-line Mach-Zehnder interferometer based on an inner air-cavity is presented for high-pressure measureement. The inner air-cavity is fabricated by use of femtosecond laser micromachining together with fusion splicing technique. A micro-channel is created on the top of the inner air-cavity to allow the high pressure gas to flow in. The fiber in-line device is featured with miniature size, good robustness and excellent operation stability while exhibiting a high pressure sensitivity of 8,239 pm/MPa.Mahidol UniversityComputer ScienceEngineeringMaterials ScienceMathematicsConference PaperSCOPUS10.1117/12.2190520