Flying particle sensors
Thursday, 27 Aug. 2015, 10:00 - 11:00
Presenter: Dmitry S. Bykov; Max Planck Institute for the Science of Light, Erlangen
Host: M. Aspelmeyer
Where: Kurt-Gödel-Hörsaal, Boltzmanngasse 5, ground floor, 1090 Wien
Optical fibre sensors make use of diverse physical effects to measure parameters such as strain, temperature and electric fields. Here we introduce a new class of reconfigurable fibre sensor, based on a ‘flying particle’ optically trapped inside a hollow-core photonic crystal fibre (HC-PCF) . In one example, the transverse displacement of a charged microparticle, detected by changes in the transmitted light signal, is used to map the electric field pattern near the surface of a multi-element electrode with a spatial resolution of ~100 μm. In a second example, Doppler-based velocity measurements are used to map the gas viscosity, and thus the temperature, along a HC-PCF. The system represents a new paradigm in fibre sensors, potentially allowing multiple physical quantities to be mapped with high positional accuracy over km distances.
References:  D. Bykov. et al., Nat. Phot. 9, pp. 461–465 (2015).