Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing
Data(s) |
15/06/2015
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Resumo |
In-fiber microchannels were fabricated directly in standard single mode fiber using the femtosecond laser inscribe and etch technique. This method of creating in-fiber microchannels offers great versatility, since it allows complex three-dimensional structures to be inscribed and then preferentially etched with hydrofluoric acid. In addition, inscription does not require a photosensitive fiber; the modification is induced through nonlinear processes triggered by an ultrashort laser pulse. Four in-fiber microchannel designs were experimentally investigated using this technique - microhole, microslot channel along the core, microslot channel perpendicular to the core and helical channel around the core. Each device design was evaluated through monitoring the optical spectral change while inserting a range of index matching oils into each microchannel; an R.I. sensitivity up to 1.55 dB/RIU was achieved in these initial tests. Furthermore, an all femtosecond laser inscribed Fabry-Pérot-based refractometer with an R.I. sensitivity of 2.75 nm/RIU was also demonstrated. The Fabry-Pérot refractometer was formed by positioning a microchannel between two femtosecond laser inscribed point-by-point fiber Bragg gratings. |
Formato |
application/pdf |
Identificador |
Lee, Graham C.B.; Mou, Chengbo; Zhou, Kaiming and Sugden, Kate (2015). Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing. Journal of Lightwave Technology, 33 (12), pp. 2561-2565. |
Relação |
http://eprints.aston.ac.uk/26557/ |
Tipo |
Article PeerReviewed |