Ti:sapphire rib channel waveguide fabricated by reactive ion etching of a planar waveguide

A. Crunteanu, Markus Pollnau, G. Jänchen, C. Hibert, P. Hoffmann, R.P. Salathé, R.W. Eason, C. Grivas, D.P. Shepherd

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    We report, to our knowledge, the first active channel waveguide in Ti:sapphire. We have created ~ 1.4-μm high ribs in a ~ 10-μm thick Ti:sapphire planar waveguide by reactive ion etching. Following excitation by an Ar-ion laser, the rib structure showed channel-waveguide fluorescence emission. The mode profiles and the beam-parameter values (M2) were measured. The coupling efficiency of fluorescence emission into a single-mode fiber was an order of magnitude higher than for fluorescence fromunstructured planar regions of the waveguide. Such devices are of interest as low-threshold tunable lasers and as broadband light sources in low-coherence interferometry.
    Original languageUndefined
    Article number10.1007/s00340-002-0952-2
    Pages (from-to)15-17
    Number of pages3
    JournalApplied physics B: Lasers and optics
    Issue number1
    Publication statusPublished - 2002


    • IOMS-APD: Active Photonic Devices
    • IR-70082
    • EWI-17548

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