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A Ti:sapphire oscillator tunable over 138 nm and maintaining a spectral linewidth less than 15 pm with no spectral jitter is presented. Outputs in the 200 mW regime with an excellent beam quality were achieved.
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.
A pair of nearly identical volumetric Bragg gratings held at different temperatures serving as the end mirrors of a Ti:sapphire laser made possible very narrow output linewidth and enabled easy optimization of the laser output.
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