Remote System for Detection of Low-Levels of Methane Based on Photonic Crystal Fibres and Wavelength Modulation Spectroscopy
Figure 11
(Experimental results for the diffusion time of 5 of 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.
