Extremely long decay time optical cavity
- DELLA VALLE, FEDERICO
- MILOTTI, EDOARDO
- EJLLI, ALDO
- GASTALDI, UGO
- MESSINEO, GIUSEPPE
- PIEMONTESE, LIVIO
- ZAVATTINI, GUIDO
- PENGO, RUGGERO
- RUOSO, GIUSEPPE
DOIAbstract
We report on the resonant Fabry Perot cavity of the PVLAS (Polarization of the Vacuum with LASer) experiment operating at $lambda = 1064$ nm with a record decay time of 2.7 ms, a factor more than two larger than any previously reported optical resonator. This corresponds to a coherence length of $8.1cdot10^5$ m. The cavity length is 3.303 m, and the resulting finesse is 770 000
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