Abstract
We report the fabrication and characterization of a highly sensitive refractive-index sensor based on a long-period grating (LPG) pair with a fiber-taper section in between. Two LPGs with ∼3-dB transmissivity form an in-fiber Mach-Zehnder interferometer. A fiber taper is made between the two LPGs to improve and tailor the sensitivity of the sensor. Enhanced sensitivity, which is about five times higher than that of a normal LPG pair, is achieved in the experiment.
Original language | English |
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Pages (from-to) | 1247-1249 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 17 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Jun 2005 |
Externally published | Yes |
Keywords
- Fiber taper
- Long-period fiber gratings
- Optical fiber sensor
- Refractive-index (RI) measurement
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy (miscellaneous)