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In many laser spectroscopic techniques, such as fluorescence Raman and resonance Raman spectroscopy the choice of laser excitation wavelength is of central importance. Thus, it is desirable to have a single laser light source where the wavelength can be tuned fast, easily and continuously without the necessity of changing the optical alignment. Here, such a light source is presented combining a broad spectrum with a spatial light modulator as tunable filter. The feasibility of this setup for Raman spectroscopy is demonstrated.