TY  - CONF
AU  - Kopp, Victor I.
AU  - Churikov, Victor M.
AU  - Zhang, Guoyin
AU  - Singer, Jonathan
AU  - Draper, Christopher W.
AU  - Chao, Norman
AU  - Neugroschl, Daniel
AU  - Genack, Azriel Z.
PY  - 2007
DA  - 2007//
TI  - Chiral fiber gratings: perspectives and challenges for sensing applications
T2  - Proc. 3rd European Workshop on Opt. Fibre Sensors
BT  - Proceedings of Third european workshop on optical fibre sensors
SP  - 66190B-(1-8)
VL  - 6619
KW  - optical fiber gratings
KW  - chiral fiber gratings applications
KW  - chiral gratings applications
KW  - from chiralphotonics
AB  - Chiral fiber gratings are produced in a microforming process in which optical fibers with noncircular or nonconcentric cores are twisted as they pass though a miniature oven. Periodic glass structures as stable as the glass material itself are produced with helical pitch that ranges from under a micron to hundreds of microns. The geometry of the fiber cross section determines the symmetry of the resulting structure which in turn determines its polarization selectivity. Single helix structures are polarization insensitive while double helix gratings interact only with a single optical polarization. Both single and double helix gratings may act as a fiber long period grating, coupling the core and cladding modes. The coupling is manifested in a series of narrow dips in the transmission spectrum. The dip position is sensitive to fiber elongation, twist and temperature, and to the refractive index of the surrounding medium. The suitability of chiral gratings for sensing pressure, temperature and liquid levels is investigated. Polarization insensitive single helix silica glass gratings display excellent stability up to temperatures of 6000C, while a pressure sensor with dynamic range of nearly 40 dB is demonstrated in polarization selective double helix gratings.
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=855), last updated on Tue, 25 May 2021 14:49:40 -0500
ID  - Kopp_etal2007
ER  -