A fibre-optic thermometric sensor based on the thermo-optic effect of titanium dioxide coatings

✍ Scribed by M.Naci Inci; J.S. Barton; J.D.C. Jones

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 481 KB
• Volume: 29
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(96)00055-2

✦ Synopsis

An experimental determination of the thermo-optic effect of titanium dioxide is described in which the test element is a thin film deposited onto the end face of an optical fibre. The film acts as an etalon. The reflectivity of titanium dioxide films was measured as a function of temperature experimentally over the range 20°C to 5OO"C, and modelled theoretically to yield a value of the thermo-optic coefficient of -1.49

x 1 O-4 K-l. The use of the data in the design of a thin-film optical fibre temperature sensor is described.