Lasing characteristics of a CW Tm:LuAG with a set of double cavity is presented in this letter. As the air gap etalon keeping at 342 µm, the highest output power reaches 107.8 mW when the totally input pump power is 1.95 W. The output center wavelength is 2027.0 nm. A single longitude mode output power of 17.1 mW is obtained when incident pump power is 855.1 mW. With the changing of DC voltage on the Piezoelectric Transducer (PZT) holding the output coupler, the reflection of the effective mirror changes correspondingly. The oscillating wavelength shifts from 2022 nm to 2031 nm. To our knowledge, this work is the first time to investigate the double cavity design in Tm:LuAG to achieve single longitude mode and tuning oscillation wavelength output laser. Output power, a.u.
By unequal-frequency hybrid resonance followed by hybrid resonance four-wave mixing in Na2-Na mixture, broadly tunable uv coherent radiation in the wavelength region 319.2-354.2 nm has been generated. The experimental and theoretical analysis have been focused on the particular mechanism and the features of the w coherent radiation.
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