title: Alternative approach to stable lasers: the optically pumped NH(3) laser.
abstract: A beat-note stability of 500 Hz over 1 sec has been observed between two free-running optically pumped NH(3) lasers. The 12-microm laser frequency is strongly isolated from cavity-mirror motion and is relatively insensitive to perturbations in the pump lasers.
authors.forename: K J
authors.initials: KJ
authors.lastname: Siemsen
authors.forename: E
authors.initials: E
authors.lastname: Williams
authors.forename: J
authors.initials: J
authors.lastname: Reid