Tunable frequency-controlled laser source in the near ultraviolet based on doubling of a semiconductor diode laser
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Abstract
Continuously tunable ultraviolet laser radiation at 397 nm was generated by doubling the output of a semiconductor diode laser. The fundamental radiation was provided by a 150 mW AlGaAs laser diode injected by a low-power AlGaAs laser diode which was frequency stabilized by optical feedback using a new scheme of a miniature external cavity. Second-harmonic generation was produced in a lithium-triborate crystal placed in a compact enhancement cavity. The fundamental radiation was used for sub-Doppler spectroscopy of the Ar I 4s3P00−4p1P1 transition at 795 nm; the second-harmonic radiation was used for spectroscopy of the Ca II 42S1/2−42P1/2 transition at 397 nm.
PACS
42.55.Px 42.65.KyPreview
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