UVA Sensor Based on Highly Birefringent Fiber Covered With Graphene Oxide

An innovative idea of exploiting unique properties of graphene oxide (GO) in long wave ultraviolet A (UVA) radiation sensor design is presented. The idea assumes that the temperature changes around a highly birefringent (HB) fiber can be induced by UVA radiation. Particular attention in the case of UVA radiation detection should be focused on GO, which has high absorption in the whole UV radiation range. Since UV lighting increases the internal energy of GO, as a consequence, a local raise of temperature on the surface of the HB fiber is observed. This temperature increase influences stress distribution in the HB fiber, and hence, the output state of polarization is modified.

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