]>Remote System for Detection of Low-Levels of Methane Based on Photonic Crystal Fibres and Wavelength Modulation Spectroscopy : Figure 11
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Figure 11: (Experimental results for the diffusion time of 5 % of C H 4 inside an HC-PCF with a length of 13.7 cm (two open ends). The theoretical expected value (241 seconds) is shown by the vertical line, while the experimental one is 248 seconds.