Highly sensitive refractometer with photonic crystal fiber long-period grating

Details Highly sensitive refractometer with photonic crystal fiber long-period grating Highly sensitive refractometer with photonic crystal fiber long-period grating

2007-11-19

arxiv.org/abs/0711.2864v1

Physics

Optics

4 pages, 3 figures, journal paper, submitted

Scientific paper

10.1364/OL.33.000563

We present highly sensitive refractometers based on a long-period grating in a large mode area PCF. The maximum sensitivity is 1500 nm/RIU at a refractive index of 1.33, the highest reported for any fiber grating. The minimal detectable index change is $2\times 10^{-5}$. The high sensitivity is obtained by infiltrating the sample into the holes of the photonic crystal fiber to give a strong interaction between the sample and the probing field.

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