Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Azzurra Volpi"'
Autor:
Karl Krämer, Mansoor Sheik-Bahae, Eric J. Peterson, Brenden Wiggins, Azzurra Volpi, Jackson Kock, Alexander R. Albrecht, Daniel Biner, Markus P. Hehlen, Michael N. Spilde
Publikováno v:
Crystal Growth & Design. 21:2142-2153
The first demonstration of solid-state laser cooling in fluoride crystals grown by the Bridgman method is reported. We present advances in the Bridgman crystal growth of Yb3+-doped LiLuF4 (LLF:Yb) ...
Autor:
Jackson Kock, Azzurra Volpi, Alexander R. Albrecht, Duncan McGraw, Richard I. Epstein, Mansoor Sheik-Bahae
Publikováno v:
Photonic Heat Engines: Science and Applications IV.
Autor:
Mansoor Sheik-Bahae, Richard I. Epstein, Mostafa Peysokhan, Saeid Rostami, Alexander R. Albrecht, Markus P. Hehlen, Jackson Kock, Azzurra Volpi
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Laser cooling of solids, also known as optical refrigeration, is based on anti-Stokes fluorescence upconversion where low-entropy laser light with photon energy less than mean fluorescence energy is absorbed followed by highly efficient fluorescence
Publikováno v:
Photonic Heat Engines: Science and Applications III.
High purity is a fundamental requirement to enable laser-cooling-grade materials. The vertical Bridgman method is well suited for crystal growth on the few-grams scale, which is compatible with purification techniques that aim to exceed the typical 9
Autor:
Mansoor Sheik-Bahae, Azzurra Volpi, Alexander R. Albrecht, Saeid Rostami, Jackson Kock, Markus P. Hehlen
Publikováno v:
Photonic Heat Engines: Science and Applications III.
In radiation balanced lasers, anti-Stokes fluorescence is used to minimize the heat generated by the quantum defect and other non-radiative processes. Thermo-optics distortions can be minimized, enabling the scaling to high power. Here, experimental
Autor:
Karl Krämer, Alexander R. Albrecht, Mansoor Sheik-Bahae, Markus P. Hehlen, Azzurra Volpi, Daniel Biner
Publikováno v:
Photonic Heat Engines: Science and Applications II.
We report on the Bridgman crystal growth of Yb3+-doped LiLuF4 (LLF:Yb) for radiation balanced laser (RBL) applications. Crystals were grown on both radio-frequency (RF) heated and resistively heated furnaces starting from the binary fluorides LiF, Lu
Autor:
Alexander R. Albrecht, Richard I. Epstein, Junwei Meng, Mansoor Sheik-Bahae, Azzurra Volpi, Jackson Kock
Publikováno v:
Photonic Heat Engines: Science and Applications II.
Optical refrigeration of a Yb:YLF crystal can be used to cool an arbitrary payload, utilizing a novel MgF2 thermal link in a completely vibration free optical cryocooler. We discuss the latest advances in the design and implementation of an astigmati
Autor:
Richard I. Epstein, Alexander R. Albrecht, Markus P. Hehlen, Mansoor Sheik-Bahae, Junwei Meng, Azzurra Volpi
Publikováno v:
Photonic Heat Engines: Science and Applications.
Optical refrigeration of Yb:YLF crystals is used to cool an arbitrary payload (HgCdTe IR sensor) for the first time to below 135K in a completely vibration free environment. This milestone is made possible by the design and fabrication of a specialty
Autor:
Alexander R. Albrecht, Karl Krämer, Mansoor Sheik-Bahae, Markus P. Hehlen, Daniel Biner, Azzurra Volpi, Junwei Meng
Publikováno v:
Photonic Heat Engines: Science and Applications.
Single crystals of LiYF4 (YLF) and LiLuF4 (LLF) doped with Yb3+, Tm3+, or Ho3+ are attractive materials for enabling radiation balanced lasers (RBLs) operating in the 1–2 μm wavelength range. High material purity and short growth times are critica
Publikováno v:
Photonic Heat Engines: Science and Applications.
Detailed characterization of Tm- and Ho-doped crystals is performed to identify optimum operation parameters for reaching cryogenic temperatures. The energy-gap scaling law states that these materials can deliver double the cooling efficiency compare