title: Twofold critical geometry for lasers.
abstract: Use of a twofold critical cavity is proposed to obtain a symmetrical saturated absorption peak on a symmetrical background. The experimental verification is performed on the CH(4)3.39-microm system. This geometry is expected to provide optical frequency standards with better reproducibility.
authors.forename: A L
authors.initials: AL
authors.lastname: Floch
authors.forename: J M
authors.initials: JM
authors.lastname: Lenormand
authors.forename: G
authors.initials: G
authors.lastname: Ropars
authors.forename: R L
authors.initials: RL
authors.lastname: Naour