Optimization and characterization of femtosecond laser inscribed in-fiber microchannels for liquid sensing


Autoria(s): Lee, Graham C.B.; Mou, Chengbo; Zhou, Kaiming; Sugden, Kate
Data(s)

15/06/2015

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

http://eprints.aston.ac.uk/26557/1/Femtosecond_laser_inscribed_in_fiber_microchannels_for_liquid_sensing.pdf

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