Temperature sensing using CdSe quantum dot doped poly(methyl methacrylate) microfiber

• Published in: Applied Optics
• Main Author: Irawati N.; Harun S.W.; Rahman H.A.; Chong S.S.; Hamizi N.A.; Ahmad H.
• Format: Article
• Language: English
• Published: OSA - The Optical Society 2017
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020305892&doi=10.1364%2fAO.56.004675&partnerID=40&md5=5b7ff81e301e9e5dfa88710655a4639f

This work describes noncontact temperature measurements using wavelength shifts of CdSe quantum dot (QD) doped poly(methyl methacrylate) microfiber. The sensor is fabricated using a drawing method by bridging two tapered single mode fibers with a polymer microfiber (PMF) approximately 3 μm in diameter. A set of a PMF section with and without the doping of the CdSe-ZnS core-shell QD was applied as sensing probes and used to measure temperatures over the range of 25°C-48°C. The experimental results show that the doped PMF is able to achieve a higher performance with a reasonably good sensitivity of 58.5 pm/°C based on the wavelength shifting, which is about 18 times that of the undoped PMF temperature sensitivity. The proposed sensor showed a linear temperature sensing range that matches well with the physiologically relevant temperatures. Moreover, these results open the way for long-Term and high-stability realization of temperature sensing optical fibers. © 2017 Optical Society of America.