Abstract
We propose to measure the concentration of potassium chloride using photonic crystal fiber having circular air holes of diameter 400 nm. The principle of measurement is based on the linear variation of the transmitted field emerging from the PCF with respect to concentration of potassium chloride. Field distribution in photonic crystal structure is simulated using plane wave expansion (PWE) method. Simulation result reveals that the intensity of transmitted light varies linearly with respect to concentration of potassium chloride filled in the air holes.
Highlights
A great deal of work has been focused on the field of photonic crystal fiber (PCF) technology due to their optical properties
The operational principle of PCF is based on the photonic band gap
We have theoretically designed a photonic crystal fiber which is used to measure the concentration of potassium chloride by knowing transmitted intensities
Summary
A great deal of work has been focused on the field of photonic crystal fiber (PCF) technology due to their optical properties. Photonic band gap of the fiber depends on the periodic variation of permittivity as a function of position This periodic variation can occur in one, two or three dimensions and can be manipulated by controlling the magnitude, shape and period of permittivity. Apart from these parameters, photonic band gap of the same fiber depends on the defect available in the PCF. The photonic band gap of PCF having defect, controls the electric field distribution in the same fiber. In this case, the principle of concentration measurement is based on linear variation of electric field with concentration. The lattice constants and diameter of air holes are 1 μm and 0.4 μm respectively
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