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Deep red laser emission in Ho:YLF

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4 Author(s)
Chicklis, E.P. ; Sanders Associates, Inc., Nashua, NH, USA ; Naiman, C.S. ; Esterowitz, L. ; Allen, R.

Laser operation of the5S25I7transition in 2 percent Ho:YLF at room temperature is reported. Oscillations at \lambda = 750 nm were obtained in flashlamp and dye laser pumped experiments. Thresholds of 4 J/cm and 3 \times 10^{-4} J/cm were observed in flashlamp and laser pumped operation, respectively. The 750-nm transition in the Ho:YLF is a four-level laser with a stimulated emission cross section of \sigma = 9.7 \times 10^{-19} cm2.

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Quantum Electronics, IEEE Journal of  (Volume:13 ,  Issue: 11 )