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Optofluidic evanescent dye laser based on a distributed feedback circular grating

2009; American Institute of Physics; Volume: 94; Issue: 16 Linguagem: Inglês

10.1063/1.3124652

1520-8842

Wuzhou Song, Andreas E. Vasdekis, Zhenyu Li, Demetri Psaltis,

Photonic Crystals and Applications

We demonstrate an optofluidic evanescent laser based on a solid circular distributed feedback grating with the dye solution acting as the cladding layer. The laser mode is confined within the grating and experiences optical gain via the interaction between its evanescent component with the dye solution. Above a pump energy of 9.5 μJ/pulse, the laser exhibited single mode operation at 571 nm. Stable, narrow-linewidth emission was observed for a wide range of fluid refractive indices, even for those lower than of polydimethylsiloxane. We attribute this property to the evanescent coupling of the laser mode with the fluidic gain.