Abstract
We demonstrated low noise blue SHG (Second Harmonic Generation) light by a single mode oscillation for intracavity frequency doubled laser diode (LD) pumped Cr dope LiSrAlF6 (Cr:LiSAF) solid state laser. The SHG crystal used LiB3O5 (LBO). A birefringent filter and an etalon plate were used for single mode of Cr:LiSAF laser oscillation wave. The maximum blue SHG output power obtained 32 mW by using 1mm thickness of birefringent filter and 20% reflectivity 200 μm thickness of an etalon plate. The oscillation wavelength is changed with 0.24 pm/hPa for atmospheric pressure. The long term stability showed 300 hours by the cavity inserted into pressure box.
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