TY  - JOUR
AU  - Hoeffgen, S. K.
AU  - Kuhnhenn, J.
AU  - Weinand, U.
PY  - 2010
DA  - 2010//
TI  - High radiation sensitivity of chiral long period gratings
JO  - IEEE Trans. Nucl. Sci.
SP  - 2915
EP  - 2922
VL  - 57
IS  - 5
KW  - chiral fiber gratings
KW  - chiral gratings
KW  - chiral LPG
KW  - from chiralphotonics
AB  - The radiation sensitivity of chiral long period gratings was investigated for the first time. After a Co-60 gamma dose of 100 kGy they show radiation-induced changes of their transmission dip wavelength of up to 10 nm, which is 100 to 1000 times higher than the radiation-induced wavelength shift of different fiber Bragg grating types. They can therefore be used as radiation sensors down to doses of 10 Gy or even below, but not for accurate dose measurements since the size of the wavelength shift after a certain dose still depends on the radiation dose rate. Chiral gratings made of eight single mode fiber types with differences of their radiation-induced attenuation of several orders of magnitude were investigated in order to look for a correlation between dip wavelength shift and fiber attenuation. However, the dip wavelength curves do not show exactly the same order as the fiber attenuation curves. A theory that can exactly predict all properties of the chiral gratings might enable us to specify from our results an optimized fiber for the production of gratings that can also be used for radiation dosimetry.
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=848), last updated on Sun, 22 May 2016 16:05:49 -0500
ID  - Hoeffgen_etal2010
ER  -