title: Stable semiconductor laser with a 7-Hz linewidth by an optical-electrical double-feedback technique.
abstract: A semiconductor laser with a linewidth of 7 Hz locking to a supercavity was achieved by using an optical-electrical double-feedback technique. The emitted power concentration within the stabilized field spectrum was 81%. The minimum value of the square root of the Allan variance for the frequency stability was 2.4 x 10(-14) at the integration time of 70 msec.
authors.affiliation: Graduate School at Nagatsuta, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 227 Japan.
authors.forename: C H
authors.initials: CH
authors.lastname: Shin
authors.forename: M
authors.initials: M
authors.lastname: Ohtsu