Abstract
We report on tunable simultaneous continuous-wave multi-wavelength Yb:GYSO lasers in a stable three-folded resonator with an intra-cavity prism for the first time to our knowledge. A fused silica dispersive prism used in a three-mirror cavity at an angle intentionally deviating from the Brewster angle has been shown to be effective in controlling the losses of different transitions in the cavity, providing multi-wavelength emissions, leading to a stable multi-wavelength oscillation over a long timescale. The multi-wavelength oscillation can be easily controlled by adjusting the output coupler, allowing flexible selectivity of the different wavelengths and full controllability of the multi-wavelength lasing. Under different cavity alignments, dual-, three-and four-wavelength lasers were successfully realized around 1041–1043, 1048–1052, 1056–1063 and 1080–1089 nm, indicating that all the multi-wavelength laser emissions originated from the resonance transitions from a shared excited level to different terminal sub-levels.
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