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We present an Yb:YAG thin-disk oscillator providing a tunable linewidth of 50-pm via VBG-based feedback. Output powers of up to 2 W have been recorded while maintaining an excellent spatial profile.
We developed a compact, narrow-linewidth diode-pumped Yb:YAG laser with volume Bragg grating delivering stable TEM00-mode Q-switched pulses at 1030 nm with average output of 1 W at 10 kHz and linewidth of < 0.08 nm.
Spectral narrowing of Ti:sapphire down to two longitudinal modes has been achieved in the 3 W pump power range and 200 mW output using a compact design. Further improvements leading to single mode operation are discussed.
Volume Bragg gratings (VBG) with efficiency exceeding 95% recorded in a novel patented material, which is a photo-thermo-refractive (PTR) glass, and used for high-power laser beam control. Exceptionally narrow spectral and/or angular selectivity are used for angular magnification in laser scanners, spectral beam combining, and spectral stabilization of semiconductor lasers.
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