Temperature coefficient of the high-frequency guided acoustic mode in a photonic crystal fiber |
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Authors: | Carry Emile Beugnot Jean-Charles Stiller Birgit Lee Min W Maillotte Hervé Sylvestre Thibaut |
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Affiliation: | Institut FEMTO-ST, Université de Franche-Comté, CNRS UMR 6174, 25030 Besan?on, France. |
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Abstract: | High-frequency guided acoustic Brillouin modes have recently been observed in small-core silica photonic crystal fibers. In this paper, we investigate the temperature dependence of the optical sideband frequency generated by one of these guided acoustic waves. The experimental results show a temperature coefficient of 100 kHz/°C at an acoustic resonance frequency of 1.15 GHz and are in very good agreement with the theoretical predictions. This coefficient demonstrates a temperature sensitivity 10 times larger than that previously reported in conventional single-mode fibers, which is promising in view of potential applications to optical fiber sensors. |
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