title: Low-loss grating for coupling to a high-finesse cavity.
abstract: A concept for a low-loss all-reflective cavity coupler is experimentally demonstrated at a wavelength of 1064 nm. A 1450-nm period dielectric reflection grating with a diffraction efficiency of 0.58% in the - 1st order is used in the 2nd-order Littrow configuration as a coupler to form a cavity with a finesse of 400. The application of such reflective low-loss cavity couplers in future generations of gravitational-wave detectors and implementation issues are discussed.
authors.affiliation: Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), and Institut für Atom- und Molekülphysik, Universität Hannover, Hannover, Germany. alexander.bunkowski@aei.mpg.de
authors.forename: A
authors.initials: A
authors.lastname: Bunkowski
authors.forename: O
authors.initials: O
authors.lastname: Burmeister
authors.forename: P
authors.initials: P
authors.lastname: Beyersdorf
authors.forename: K
authors.initials: K
authors.lastname: Danzmann
authors.forename: R
authors.initials: R
authors.lastname: Schnabel
authors.forename: T
authors.initials: T
authors.lastname: Clausnitzer
authors.forename: E B
authors.initials: EB
authors.lastname: Kley
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann