title: Stretching-tunable external-cavity laser locked by an elastic silicone grating.
abstract: We demonstrate wavelength locking of a diode laser at 760 nm with feedback from an elastic transmission grating in the Littrow configuration. The laser was in a single longitudinal mode with a side-mode suppression of 20 dB. By stretching the grating the laser could be tuned over a few nm. The grating was fabricated in a silicone elastomer (polydimethylsiloxane) by a moulding technique, and coated by a thin layer of Ti and Au to achieve an increased diffraction efficiency needed for efficient locking.
authors.forename: Stefano
authors.initials: S
authors.lastname: Bertani
authors.forename: Björn
authors.initials: B
authors.lastname: Jacobsson
authors.forename: Fredrik
authors.initials: F
authors.lastname: Laurell
authors.forename: Valdas
authors.initials: V
authors.lastname: Pasiskevicius
authors.forename: Mårten
authors.initials: M
authors.lastname: Stjernström