Smart, R.G., Hanna, D.C., Tropper, A.C., Davey, S.T., Carter, S.F. and Szebesta, D.
CW Room temperature upconversion lasing at blue, green and red wavelengths in infrared-pumped Pr3+-doped fluoride fibre
Electronics Letters, 27, (14), . (doi:10.1049/el:19910817).
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Continuous-wave, room temperature laser oscillation at 491 nm, 520 nm, 605 nm and 635 nm in a Pr3+-doped fluoro-zirconate fibre pumped simultaneously at 1.01 µm and 0.835µm is reported. An output power of 185mW has been measured for the 635 nm transition. The thresholds obtained suggest that laser diode-pumped operation of all four transitions should be possible in an optimised fibre.
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