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A 3D passive ring gyroscope for seismology
Thomas Gereons, Jannik Zenner, Thorsten Groh +1
In seismology and related fields, the measurement of rotation in all three spatial dimensions is essential to complement the observation of translations. Access to all six degrees…
Optical steering of a large ring laser
Jannik Zenner, Karl Ulrich Schreiber, Simon Stellmer
A common approach to reduce the linewidth of a laser is an increase of its resonator length. In large gas lasers, however, the frequency spacing between longitudinal modes of the r…
Hänsch-Couillaud locking of a large Sagnac interferometer: advancing below the flicker floor
Jannik Zenner, Karl Ulrich Schreiber, Simon Stellmer
Large Sagnac interferometers in the form of active ring lasers have emerged as unique rotation sensors in the geosciences, where their sensitivity allows to detect geodetic and sei…
A tunable, continuous-wave 130-mW laser at 213 nm
Lukas Möller, Stephan Hannig, Stefan Truppe +1
We present a tunable, continuous-wave (CW) laser system emitting at 213 nm, based on the frequency quadrupling of a single Ti:sapph laser. The setup features two sequential, cavity…
Stabilizing the free spectral range of a large ring laser
Jannik Zenner, Karl Ulrich Schreiber, Simon Stellmer
A ring laser is defined by its perimeter, which directly enters the conversion factor between measured Sagnac frequency and the actual rotation rate. Large ring lasers employed in…
A frequency quintupled laser at 308 nm for spectroscopy of intercombination lines in zinc
Maya Büki, David Röser, Simon Stellmer
Many experiments in atomic physics and quantum optics, among them optical atomic clocks, require laser sources in the ultra-violet wavelength range with very low intensity noise an…