Abstract
A dual-off-axis pumping scheme is presented to generate orbital-angular-momentum (OAM) beam in Yb:CALGO laser. The OAM and wavelength can be actively controlled by the off-axis displacements and pump power with wavelength-tunable width about 10 nm and the OAM-tunable range from ±1ћ to ±15ћ.
© 2018 The Author(s)
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