Amplitude noise and linewidth reduction of an Ar+ laser |
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| Authors: | Bisi M. Bertinetto F. |
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| Affiliation: | Ist. di Metrol., Torino; |
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| Abstract: | Frequency modulation spectroscopy is used to frequency stabilize an Ar+ laser at 515 nm with respect to a commercial passive cavity. Two transducers, a slow and a fast one, are used. The fast transducer is also used to perform amplitude stabilization of a laser beam. Measured amplitude and frequency spectral noise densities are reported. A simplified scheme of the circuitry used to reduce amplitude noise is shown. Noise characteristics of the realized system are adequate to perform spectroscopy of hyperfine-structure transitions of molecular iodine |
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