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This paper reports a tunable three-dimensional (3D) liquid-liquid waveguide laser constructed by two flow streams in a microchannel. It comprises a 3D dye dissolved liquid-liquid waveguide as gain medium and gold (Au) mirrors to provide feedback. The 3D liquid-liquid waveguide is highly efficient to overcome the optical loss as compared with liquid-liquid three-dimensional (2D) waveguide. The lasing...
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