title: Extremely long decay time optical cavity.
abstract: We report on the resonant Fabry Perot cavity of the PVLAS (Polarization of the Vacuum with LASer) experiment operating at λ = 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 8.1 · 10(5) m. The cavity length is 3.303 m, and the resulting finesse is 770,000.
authors.forename: F
authors.initials: F
authors.lastname: Della Valle
authors.forename: E
authors.initials: E
authors.lastname: Milotti
authors.forename: A
authors.initials: A
authors.lastname: Ejlli
authors.forename: U
authors.initials: U
authors.lastname: Gastaldi
authors.forename: G
authors.initials: G
authors.lastname: Messineo
authors.forename: L
authors.initials: L
authors.lastname: Piemontese
authors.forename: G
authors.initials: G
authors.lastname: Zavattini
authors.forename: R
authors.initials: R
authors.lastname: Pengo
authors.forename: G
authors.initials: G
authors.lastname: Ruoso