A broadly tunable yellow-green laser using F+3 centers and some unknown centers in a LiF crystal at room temperature is reported. The laser output extended from 500 to 640 nm and peaked at 535 and 610 nm.
We report the experimental observation of nonlinear optical phase conjugation using F+3 centers in LiF crystals. Using a pulsed dye laser (460 nm) as pump light, a maximum phase conjugate reflectivity of about 0.1% was obtained.
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