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Operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser

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Figure

Fig. 2.Measured reflectance (right ordinate) and photolumines-cence emission spectra (left ordinate) of the VECSEL sample atroom temperature with normal incidence
Fig. 3.PL excitation spectrum. The peak fluorescence at around840 nm is shown as a function of the excitation wavelength
Fig. 4.Optimum pump angle as a function of pump wavelength.The optimum pump angle was taken to be that which resulted inthe highest PL intensity at the 840 nm maximum
Fig. 8.Gain dependence of the VECSEL with (square symbolsfitted with a solid curve) and without (triangular symbols fittedwith a dashed curve) pump retroreflection.
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