KEYWORDS: Crystals, Laser crystals, Laser induced fluorescence, Color centers, Tunable lasers, Color center lasers, Laser stabilization, Absorption, Current controlled current source, Pulsed laser operation
The first room temperature stable tunable color center (CC) distributed feedback (DFB) laser is described. The laser utilizes stabilized F2+** centers in LiF (LiF:F2+**) as a gain medium. Tunable DFB lasing was achieved in the near IR region (882 - 962 nm) with a lasing linewidth of less than 0.2 cm-1. The lasing threshold was found to be 1.2 mJ, while the slope efficiency with respect to pump energy was found to be as high as 3%.
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