Temperature sensor using ferrofluid thin film
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A brand new design of temperature sensor using ferrofluid thin film is proposed in this paper. When magnetic field parallel to the plane of the ferrofluid thin film is applied, magnetic chains form in the same direction of the magnetic field, which results in the suppressing of optical transmission. It is observed that the optical transmission is changed by the ambient temperature, so that temperature sensor can be constructed by measuring the transmission power of a laser. The physics and the sensitivity of the temperature sensor are also analyzed.
KeywordsTemperature sensor Ferrofluid Magnetic chains Optical transmission Sensitivity
- Henry DM, Herringer JH, Djeu N (1999) Response of 1.6 μm Er:Y3Al5O12 fiber-optic temperature sensor up to 1520 K. Phys Appl Lett 74:23Google Scholar
- Shenping Li, Chan KT (1998) Optical fiber temperature sensor using a gain-switched Fabry–Perot semiconductor laser self-seeded from a linearly chirped fiber Bragg grating. Appl Phys Lett 73:23Google Scholar
- Taketomi Susamu, Ukita Masakazu, Mizukami Masaki, Miyajima Hideki, Chikazumi Soshin (1987) Magnetooptical effects of magnetic fluid. Jpn J Appl Phys 56:3362Google Scholar