Carolin Rothhardt
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View article: Testing compact, fused silica resonator based inertial sensors in a gravitational wave detector prototype facility
Testing compact, fused silica resonator based inertial sensors in a gravitational wave detector prototype facility Open
Future gravitational wave observatories require significant advances in all aspects of their seismic isolation; inertial sensors being a pressing example. Inertial sensors using gram-scale high mechanical Q factor ( Q ) glass resonators co…
View article: Water Stress Corrosion in a Directly Bonded Borofloat Glass Interface
Water Stress Corrosion in a Directly Bonded Borofloat Glass Interface Open
In this article, the phenomenon of water stress corrosion (WSC) at borofloat glass interfaces joined by hydrophilic direct bonding is explored. In particular, the impact of the surface waviness and surrounding atmosphere is studied through…
View article: Measurement of the bonding energy via non-planar direct bonding
Measurement of the bonding energy via non-planar direct bonding Open
An accurate measurement of the bonding energy of an interface is important in many areas of applied research. We present a novel method for measuring the bonding energy, which is based on the principle of non-planar direct bonding, i.e., d…
View article: Technical layout and fabrication of a compact all-glass four-channel beam splitter based on a Kösters design
Technical layout and fabrication of a compact all-glass four-channel beam splitter based on a Kösters design Open
We report on the design and fabrication of a novel all-glass four-channel beam splitter based on a Kösters prism for use in space. The Kösters prism, which consists of three pairs of individual prisms, is used to separate an incoming teles…
View article: Plasma-activated direct bonding of coated optical glasses
Plasma-activated direct bonding of coated optical glasses Open
For the manufacturing of space-qualified spectrometric applications, the benefits of direct bonding are highly promising. While there are some recent spectrometric design concepts which rely on the usage of optical coatings, the direct bon…
View article: All-dielectric prism-grating-prism component realized by direct hydrophilic bonding technology for optical applications in space
All-dielectric prism-grating-prism component realized by direct hydrophilic bonding technology for optical applications in space Open
Here, we report on the approach of realizing an all-fused-silica PGP disperser (prism + grating + prism) by low temperature direct bonding. A surface relief grating with period 660nm and overall depth of approximately 2000nm is sandwiched …
View article: High-average-power femtosecond laser at 258 nm
High-average-power femtosecond laser at 258 nm Open
We present an ultrafast fiber laser system delivering 4.6 W average power at 258 nm based on two-stage fourth-harmonic generation in beta barium borate (BBO). The beam quality is close to being diffraction limited with an M2 value of 1.3×1…