Title :
A novel optofluidic evanescent waveguide sensor system for fluorescence spectroscopy fabricated by micro-stereolithography
Author :
Rosenauer, M. ; Stampfl, J. ; Vellekoop, M.J.
Author_Institution :
Inst. of Sensor & Actuator Syst., Vienna Univ. of Technol., Vienna, Austria
Abstract :
In this contribution we present the design, fabrication and measurement results of an evanescent liquid-core/ liquid-cladding (L2) waveguide sensor system for on-chip fluorescence spectroscopy. To efficiently excite the sample (fluorescent particles or solutions) in the laminar flow regime a novel hydrodynamic focusing design is realized which positions the analyte in the evanescent field region at the core/cladding interface. The fiber-chip-coupled laser light is guided by the L2 waveguide and ensures a relatively uniform fluorescence excitation along the analysis channel. The chip is fabricated by rapid prototyping (micro-stereolithography) in less than 1.5 hours.
Keywords :
fluorescence; micro-optomechanical devices; microfluidics; optical sensors; optical waveguides; rapid prototyping (industrial); stereolithography; evanescent liquid-core-liquid-cladding waveguide sensor system; fiber-chip-coupled laser light; hydrodynamic focusing design; laminar flow regime; microstereolithography; on-chip fluorescence spectroscopy; optofluidic sensor system; rapid prototyping; Fiber lasers; Fluorescence; Hydrodynamics; Laser excitation; Liquid waveguides; Optical device fabrication; Optical fiber sensors; Sensor systems; Spectroscopy; System-on-a-chip; Fluorescence Spectroscopy; L2 Waveguide; Optofluidic; Rapid Prototyping;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4244-4190-7
Electronic_ISBN :
978-1-4244-4193-8
DOI :
10.1109/SENSOR.2009.5285424