2004/11/23 by M. Gersborg-Hansen, Morten Gersborg-Hansen, S. Balslev +4 · 2 citations
Engineering · Physics and Astronomy · #Microfluidic and Capillary Electrophoresis Applications #Photonic and Optical Devices #Semiconductor Lasers and Optical Devices #physics.flu-dyn #physics.optics
paper · pdf · doi:10.1016/j.mee.2004.12.025
published as Microelectronic Engineering vol. 78-79, 185 (2005) · Accepted for Microelectronic Engineering
arxiv created 2004/11/23 · openalex publication_date 2005/01/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
We present a laterally emitting, coupled cavity micro fluidic dye ring laser, suitable for integration into lab-on-a-chip micro systems. The micro-fluidic laser has been successfully designed, fabricated, characterized and modelled. The resonator is formed by a micro-fluidic channel bounded by two isosceles triangle mirrors. The micro-fluidic laser structure is defined using photo lithography in 10 microns thick SU-8 polymer on a glass substrate. The micro fluidic channel is sealed by a glass lid, using PMMA adhesive bonding. The laser is characterized using the laser dye Rhodamine 6G dissolved in ethanol or ethylene glycol as the active gain medium, which is pumped through the micro-fluidic channel and laser resonator. The dye laser is optically pumped normal to the chip plane at 532 nm by a pulsed, frequency doubled Nd:YAG laser and lasing is observed with a threshold pump pulse energy flux of around 55 micro-Joule/square-milimeter. The lasing is multi-mode, and the laser has switchable output coupling into an integrated polymer planar waveguide. Tuning of the lasing wavelength is feasible by changing the dye/solvent properties.