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Electrical and electronic engineering
A photonic crystal fiber interferometer that operates in reflection mode for humidity detection is presented for the first time which has the advantage that it does not require the use of any hygroscopic material. The fabrication of the sensor head is therefore simple since it only involves cleaving and splicing. The all-silica nature of the device has the potential for many applications.
Mathew, J., Semenova, Y., Rajan, G., Farrell, G.:Humidity Sensor Based on a Photonic Crystal Fiber Interferometer.Electronics Letters, Vol.46, no.19, 2010