Abstract
A novel method for dew detection based on photonic crystal
fiber (PCF) interferometer that operates in reflection mode is presented in
this paper. The fabrication of the sensor head is simple since it only
involves cleaving and fusion splicing. The sensor shows good sensitivity to
dew formation with a large wavelength peak shift of the interference pattern
at the onset of dew formation. The device's response to ambient humidity and
temperature are also studied and reported in this paper. From our experiment
it is also concluded that by attaching a thermoelectric cooler with
temperature feedback, the sensor head demonstrated can be used as a
miniature dew point hygrometer.
© 2011 IEEE
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