Abstract
A new type of optical refractive-index (RI) sensor is proposed and experimentally demonstrated by using a structure of two single-mode fiber (SMF) Bragg gratings with a multimode fiber (MMF) taper in-between. The loss induced by a mismatch of waveguide structure between SMFs and MMFs is amplified by a tapering process, and is utilized for RI sensing through evanescent field. Experimental results show that the sensor possesses a tailorable sensitivity to the change of external RI and has a good linear response in the simultaneous measurement of external RI and temperature.
Original language | English |
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Pages (from-to) | 30-32 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 19 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2007 |
Externally published | Yes |
Keywords
- Fiber Bragg grating (FBG)
- Fiber-optic sensor
- Multimode fiber taper (MFT)
- Refractive-index (RI) measurement
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy (miscellaneous)