Abstract
A long-period grating (LPG) based compact optical fiber sensor working in reflection mode is demonstrated. A technique to make a mirror on the cladding region of a fiber end-face to reflect only the cladding modes was realized by growing a polymeric microtip on the core region of the fiber end-face, by photopolymerization, followed by coating the fiber end-face with an aluminum film. Using the cladding-mode-selective fiber end-face mirror, the transmission spectrum of the LPG was "inverted" and reflected. Preliminary results of using the sensor to measure the refractive index of glycerol/water solutions were successfully demonstrated.
Original language | English |
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Pages (from-to) | 17976-17982 |
Number of pages | 7 |
Journal | Optics Express |
Volume | 17 |
Issue number | 20 |
DOIs | |
Publication status | Published - 28 Sep 2009 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics