Abstract

We demonstrate a simple, robust, and highly sensitive temperature sensor based on the resonant excitation of whispering gallery modes in a coated single-mode fiber (SMF) loop that was created by means of bending a standard coated SMF into a loop with a radius of 5 mm. Clear interference fringes were observed in the transmission spectrum of the coated-SMF loop. The resonant wavelength exhibits a linear temperature response at the temperature range from −60° to 10 °C, and a quadratic temperature response at the temperature range from 10° to 140 °C. Moreover, the coated-SMF loop exhibits an ultrahigh sensitivity of up to −5.22 nm/°C at 120 °C, and the sensitivity (i.e., −4.01 nm/°C at 80 °C) is two orders of magnitude higher than that of an uncoated-SMF loop (i.e., 0.04 nm/°C at 80 °C). Hence, such a coated-SMF loop could be used to develop a temperature sensor with a large measurement range from −60° to 140 °C.

© 2015 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription