Browsing by Author "Ma, Yuanyuan"

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Direct generation of red and orange optical vortex beams from an off-axis diode-pumped Pr3+:YLF laser
(2019-06-24)
Ma, Yuanyuan
;
Valles, Adam
;
Tung, Jung-Chen
;
Chen, Yung-Fu
;
Miyamoto, Katsuhiko
We demonstrate the direct generation of visible vortex beams at 640 nm and 607 nm by employing an off-axis pumping scheme in a diode end-pumped Pr3+:YLF laser. A detailed numerical analysis, based on the coherent superposition of Hermite-Gaussian modes with different amplitudes and phases, is perfectly consistent with the experimentally observed lasing modes. The maximum vortex output powers have been measured to be 808 mW and 211 mW at a pump power of 3.16 W, for the wavelengths of 640 nm and 607 nm, respectively. We also demonstrate the handedness control of the generated vortex beam. Such a visible vortex laser can potentially be applied in super-resolution fluorescent microscopes and micro-fabrication research. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Direct generation of vortex beams from a diode-pumped Pr3+:YLF laser
(2019-01-01)
Ma, Yuanyuan
;
Tung, Jung-Chen
;
Miyamoto, Katsuhiko
;
Omatsu, Takashige
;
交大名義發表
We have demonstrated the direct generation of visible structured light beams, scalar and vector vortex modes with a wavelength of 640nm from a diode-pumped Pr3+:YLF laser by employing an off-axis pumping technique. A maximum output of similar to 100 mW was achieved at a pump power of 1.2 W. Such red structured light beams will be potentially applied to super-resolution fluorescent microscopes and microfabrications. (C) 2019 The Author(s)