Danmarks Tekniske Universitet

Thor Ansbæk

Kresten Yvind

Ole Hansen

Il-Sug Chung

Arnhold Simonsen

Gyeong Cheol Park

A grating reflector. The grating reflector includes a mesh structure defining a mesh plane and having a thickness normal thereto. The mesh structure includes parallel bars and parallel crossbars, which extend along a direction orthogonal to the bars. The bars and crossbars define a 2D grid of elongated holes, each extending through the mesh structure perpendicular to the mesh plane. The holes are elongated along a direction parallel to the bars and have a substantially rectangular shape with rounded corners. The 2D grid is defined by a cross-shaped unit cell having a bar section and an intersecting crossbar section. The grating reflector has a reflectivity in a bandwidth around a center wavelength higher than 0.99. A ratio between the unit cell volume and the center wavelength in the mesh material cubed is between 1.35 and 1.55.

Grating reflector

There is presented a method of providing a wavelength tunable photon source (), comprising bonding a first element () with a first mirror (), a second element () with a second mirror () and a third element () with a photon emitter together in a structure enclosing an inner volume () being a sealed volume, and forming a bonding interface () which is gas-tight, so that the first mirror () is placed in the inner volume () so the first mirror () may move within the inner volume (). The method provides a relatively simple way of obtaining a tunable photon source where the inner volume is sealed. The invention furthermore relates to a corresponding photon source, and use of such photon source.

Wavelength tunable photon source with sealed inner volume

Wavelength sweepable laser source is disclosed, wherein the laser source is a semiconductor laser source adapted for generating laser light at a lasing wavelength. The laser source comprises a substrate, a first reflector, and a second reflector. The first and second reflector together defines an optical cavity, and are arranged to support light oscillation in the optical cavity along an optical path in a direction normal to the substrate. The optical cavity comprises a void in the optical path. The second reflector is resiliently suspended by a suspension in a distance from the first reflector and having a rest position, the second reflector and suspension together defining a microelectromechanical MEMS oscillator. The MEMS oscillator has a resonance frequency and is adapted for oscillating the second reflector on either side of the rest position. The laser source further comprises electrical connections adapted for applying an electric field to the MEMS oscillator. Furthermore, a laser source system and a method of use of the laser source are disclosed.

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Roskilde, Denmark

Thor Ansbæk