High efficiency laser-diode-pumped continuous-wave Yb:YAG laser at room temperature

Nishio, Makoto; Shimojo, N.; Maruko, S.; Okunishi, H.; Katō, K.; Kyomoto, K.; Yoshida, Tetsuya; Kawato, Sakae

doi:10.1364/cleo_si.2014.stu1o.4

Cited by 1 publication

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“…Although the pump source was a Ti:sapphire laser, the architecture has a high capability for laser diode pumping. For laser diode pumping, the maximum slope efficiency of 77 % and the maximum optical-to-optical conversion efficiency of 72 % were obtained by our group [10]. A technique to overcome the loss without lack of the excellent characteristics is increasing the gain of the laser medium, which is obtained by high pump intensity above 100 kW/cm 2 , and precise compensation of the thermo-optic effects.…”

Section: High-efficiency Continuous-wave Oscillationsmentioning

confidence: 93%

“…High gain operation and precise compensation of the thermo-optic effects by high intensity pumping is useful to overcome the loss and increase the laser efficiencies at room temperature. Namely, the high gain overcomes the laser cavity loss, such as the reabsorption loss, and it is suitable to obtain high coupling efficiency and low lasing threshold [7]- [10]. This paper reviews high efficiency lasers, particularly in continuous wave (CW) lasers and nanosecond to picosecond pulse lasers.…”

Section: Introductionmentioning

confidence: 99%

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High-efficiency cavity-dumped micro-chip Yb:YAG laser

et al. 2014

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High-efficiency cavity-dumped ytterbium-doped yttrium aluminum garnet (Yb:YAG) laser was developed. Although the high quantum efficiency of ytterbium-doped laser materials is appropriate for high-efficiency laser oscillation, the efficiency is decreased by their quasi-three/four laser natures. High gain operation by high intensity pumping is suitable for high efficiency oscillation on the quasi-three/four lasers without extremely low temperature cooling. In our group, highest efficiency oscillations for continuous wave, nanosecond to picosecond pulse lasers were achieved at room temperature by the high gain operation in which pump intensities were beyond 100 kW/cm 2 .

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Section: High-efficiency Continuous-wave Oscillationsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%