Details

Autor(en) / Beteiligte

• Wu, Darran K C
• Kuhlmey, Boris T
• Eggleton, Benjamin J

Titel

Ultrasensitive photonic crystal fiber refractive index sensor

Ist Teil von

• Optics letters, 2009-02, Vol.34 (3), p.322

Ort / Verlag

United States

Erscheinungsjahr

2009

Quelle

MEDLINE

Beschreibungen/Notizen

• We introduce a microfluidic refractive index sensor based on a directional coupler architecture using solid-core photonic crystal fibers. The sensor achieves very high sensitivity by coupling the core mode to a mode in the adjacent fluid-filled waveguide that is beyond modal cutoff, and with strong field overlap. We demonstrate the device through the selective infiltration of a single hole with fluid along a microstructured optical fiber. A detection limit of 4.6x10(-7) refractive index units has been derived from measurements with a sensitivity of 30,100 nm per refractive index unit, which is the highest for a fiber device to date.