We report the lasing characteristics of a room-temperature continuous-wave double-clad Cr<sup>4+</sup>:YAG crystal fiber laser with a record-low threshold of 0.7 mW, more than 500 times lower than any previously reported Cr<sup>4+</sup>:YAG lasers.
© 2008 Optical Society of America
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3510) Lasers and laser optics : Lasers, fiber
(160.0160) Materials : Materials
(160.6990) Materials : Transition-metal-doped materials
C. Lai, K. Huang, H. Tsai, Z. Lin, K. Ji, and S. Huang, "Ultralow-Threshold Room-Temperature Continuous-Wave Double-Clad Cr<sup>4+</sup>:YAG Crystal Fiber Laser," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper CThL3.
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