title: Ultralow noise miniature external cavity semiconductor laser.
abstract: Advanced applications in optical metrology demand improved lasers with high spectral purity, in form factors that are small and insensitive to environmental perturbations. While laboratory-scale lasers with extraordinarily high stability and low noise have been reported, all-integrated chip-scale devices with sub-100 Hz linewidth have not been previously demonstrated. Lasers integrated with optical microresonators as external cavities have the potential for substantial reduction of noise. However, stability and spectral purity improvements of these lasers have only been validated with rack-mounted support equipment, assembled with fibre lasers to marginally improve their noise performance. In this work we report on a realization of a heterogeneously integrated, chip-scale semiconductor laser featuring 30-Hz integral linewidth as well as sub-Hz instantaneous linewidth.
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: W
authors.initials: W
authors.lastname: Liang
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: V S
authors.initials: VS
authors.lastname: Ilchenko
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: D
authors.initials: D
authors.lastname: Eliyahu
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Savchenkov
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: A B
authors.initials: AB
authors.lastname: Matsko
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: D
authors.initials: D
authors.lastname: Seidel
authors.affiliation: OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, California 91107, USA.
authors.forename: L
authors.initials: L
authors.lastname: Maleki