Potential of ytterbium doped silica glass for solid-state optical refrigeration to below 200 K

B Topper, A Neumann, AR Albrecht, AS Flores… - Optics …, 2023 - opg.optica.org
We report on the optical refrigeration of ytterbium doped silica glass by> 40 K starting at
room temperature, which represents more than a two-fold improvement over the previous …

Demonstration of laser cooling in a novel all oxide gayy silica glass

J Thomas, T Meyneng, A Tehranchi, N Gregoire… - Scientific Reports, 2023 - nature.com
We demonstrate laser induced cooling in ytterbium doped silica (SiO2) glass with alumina,
yttria co-doping (GAYY-Aluminum: Yttrium: Ytterbium Glass) fabricated using the modified …

Laser cooling ytterbium doped silica by 67 K from ambient temperature

B Topper, S Kuhn, A Neumann, AR Albrecht… - Optics …, 2024 - opg.optica.org
Laser cooling of a 5? cm long, 1? mm diameter ytterbium doped (6.56× 10^ 25 ions/m^ 3)
silica rod by 67? K from room temperature was achieved. For the pump source, a 100? W …

Site‐selective fluorescence and spectroscopic properties of Yb‐doped lanthanum titanate glasses

B Topper, A Neumann, SK Wilke… - … Journal of Applied …, 2024 - Wiley Online Library
Ytterbium‐doped lanthanum titanate glasses were prepared by levitation melting for the
detailed characterization of the Yb 3+ \rmYb^3+ spectroscopic properties in the rare‐earth …

[HTML][HTML] A Multi-Format, Multi-Wavelength Erbium-Doped Fiber Ring Laser Using a Tunable Delay Line Interferometer

CK Yao, AM Dehnaw, PC Peng - Applied Sciences, 2024 - mdpi.com
This work demonstrates the use of an erbium-doped fiber amplifier (EDFA), a tunable
bandpass filter (TBF), and a tunable delay line interferometer (TDLI) to form a ring laser that …

FDTD modeling of excitation-balanced, mJ-level pulse amplifiers in Yb-doped double-clad optical fibers

N Yu, M Xiong, PD Dragic - Optics Express, 2023 - opg.optica.org
A finite-difference time-domain (FDTD) simulation of Yb-doped cladding-pumped, mJ-level,
excitation-balanced fiber pulse amplifiers (EBFAs) is presented. In EBFAs, two pumps, one …

Impact of site-selective spectroscopy on laser cooling parameter characterization

B Topper, S Kuhn, A Neumann, AR Albrecht… - Optics …, 2023 - opg.optica.org
From laser design to optical refrigeration, experimentally measured fluorescence spectra are
often utilized to obtain input parameters for predictive models. However, in materials that …

Anti-stokes cooling in highly ytterbium doped phase separated aluminium-yttrium oxide glass by 4 k

J Thomas, T Meyneng, A Tehranchi, N Gregoire… - Optical Materials, 2023 - Elsevier
Silica glass is a strong candidate in the development of radiation balanced fiber lasers and
amplifiers due to its properties such as high stability, high mechanical robustness and …

Laser cooling experiments to measure the quantum efficiency of Yb-doped silica fibers

B Topper, A Neumann, AR Albrecht, AS Flores… - Optics Letters, 2022 - opg.optica.org
A detailed investigation into the wavelength-dependent cooling efficiencies of two ultra-pure
large core diameter ytterbium-doped silica fibers is carried out by means of the laser …

Laser cooling by over 7 K in Yb-doped ZBLAN fibers with high-power pumping at atmospheric pressure

Q Xie, D Rao, G Yu, F Li, X Guan, W Feng, L Ji, Y Cui… - Optics Letters, 2023 - opg.optica.org
Anti-Stokes fluorescence (ASF) cooling has been demonstrated to be a viable method for
balancing the waste heat produced in gain materials. In addition, radiation-balanced fiber …