131 citations · 465 across the 12 of their papers we have counts for
12 papers
Precise Measurement of Refractive Indices in Thin Film Heterostructures
Lukas W. Perner, Gar-Wing Truong, David Follman +5
We present a robust, precise, and accurate method to simultaneously measure the refractive indices of two transparent materials within an interference coating. This is achieved by…
Simultaneous Measurement of Mid-Infrared Refractive Indices in Thin-Film Heterostructures: Methodology and Results for GaAs/AlGaAs
Lukas W. Perner, Gar-Wing Truong, David Follman +5
We present our results for simultaneous measurement of the refractive indices of gallium arsenide (GaAs) and aluminum gallium arsenide (AlGaAs) from $2.…
Mid-infrared supermirrors with finesse exceeding 400 000
G. -W. Truong, L. W. Perner, D. M. Bailey +9
For trace gas sensing and precision spectroscopy, optical cavities incorporating low-loss mirrors are indispensable for path length and optical intensity enhancement. Optical inter…
Simple approach for extending the ambiguity-free-range of dual-comb ranging
Jakob Fellinger, Georg Winkler, P. E. Collin Aldia +8
Dual-comb (DC) ranging is an established method for high-precision and high-accuracy distance measurements. It is, however, restricted by an inherent length ambiguity and the requi…
Mid-infrared monocrystalline interference coatings with excess optical loss below 10 ppm
G. Winkler, L. W. Perner, G. -W. Truong +13
We present high-reflectivity substrate-transferred single-crystal GaAs/AlGaAs interference coatings at a center wavelength of 4.54 um with record-low excess optical loss below 10 p…
Flexible all-PM NALM Yb:fiber laser design for frequency comb applications: operation regimes and their noise properties
Aline S. Mayer, Wilfrid Grosinger, Jakob Fellinger +8
We present a flexible all-polarization-maintaining (PM) mode-locked ytterbium (Yb):fiber laser based on a nonlinear amplifying loop mirror (NALM). In addition to providing detailed…
Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser
Jakob Fellinger, Aline S. Mayer, Georg Winkler +7
We demonstrate dual-comb generation from an all-polarization-maintaining dual-color ytterbium (Yb) fiber laser. Two pulse trains with center wavelengths at 1030 nm and 1060 nm resp…
Near-Infrared Scanning Cavity Ringdown for Optical Loss Characterization of Supermirrors
Gar-Wing Truong, Georg Winkler, Tobias Zederbauer +6
A cavity ringdown system for probing the spatial variation of optical loss across high-reflectivity mirrors is described. This system is employed to examine substrate-transferred c…
Three Photon Absorption in Optical Parametric Oscillators Based on OP-GaAs
Oliver H. Heckl, Bryce J. Bjork, Georg Winkler +9
We report on the first singly-resonant (SR), synchronously pumped optical parametric oscillator (OPO) based on orientation-patterned gallium arsenide (OP-GaAs). Together with a dou…
Non-planar femtosecond enhancement cavity for VUV frequency comb applications
Georg Winkler, Jakob Fellinger, Jozsef Seres +2
External passive femtosecond enhancement cavities (fsECs) are widely used to increase the efficiency of non-linear conversion processes like high harmonic generation (HHG) at high…
Performance of a 229 Thorium solid-state nuclear clock
G. A. Kazakov, A. N. Litvinov, V. I. Romanenko +5
The 7.8 eV nuclear isomer transition in 229 Thorium has been suggested as an etalon transition in a new type of optical frequency standard. Here we discuss the construction of a "s…
Atomic clock with nuclear transition: current status in TU Wien
G. A. Kazakov, M. Schreitl, G. Winkler +3
The nucleus of 229Thorium presents a unique isomer state of very low energy and long lifetime, current estimates are around 7.8 eV and seconds to hours respectively. This nuclear t…