Search Results - "Albrecht, Alexander R."

Solid-state optical refrigeration to sub-100 Kelvin regime by Melgaard, Seth D., Albrecht, Alexander R., Hehlen, Markus P., Sheik-Bahae, Mansoor

“…Since the first demonstration of net cooling twenty years ago, optical refrigeration of solids has progressed to outperform all other solid-state cooling…”
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Implementation of Laser-Induced Anti-Stokes Fluorescence Power Cooling of Ytterbium-Doped Silica Glass by Peysokhan, Mostafa, Rostami, Saeid, Mobini, Esmaeil, Albrecht, Alexander R, Kuhn, Stefan, Hein, Sigrun, Hupel, Christian, Nold, Johannes, Haarlammert, Nicoletta, Schreiber, Thomas, Eberhardt, Ramona, Flores, Angel, Tünnermann, Andreas, Sheik-Bahae, Mansoor, Mafi, Arash

“…Laser cooling of a solid is achieved when a coherent laser illuminates the material, and the heat is extracted by annihilation of phonons resulting in…”
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Radiation-balanced Yb:YAG disk laser by Yang, Zhou, Meng, Junwei, Albrecht, Alexander R, Sheik-Bahae, Mansoor

“…A radiation-balanced Yb:YAG disk laser is demonstrated in an intracavity pumping geometry. Detailed analysis of the data reveals the feasibility of using the…”
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Optically pumped DBR-free semiconductor disk lasers by Yang, Zhou, Albrecht, Alexander R, Cederberg, Jeffrey G, Sheik-Bahae, Mansoor

“…We report high power distributed Bragg reflector (DBR)-free semiconductor disk lasers. With active regions lifted off and bonded to various transparent…”
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Laser cooling ytterbium doped silica by 67 K from ambient temperature by Topper, Brian, Kuhn, Stefan, Neumann, Alexander, Albrecht, Alexander R, Flores, Angel S, Hässner, Denny, Hein, Sigrun, Hupel, Christian, Nold, Johannes, Haarlammert, Nicoletta, Schreiber, Thomas, Sheik-Bahae, Mansoor, Mafi, Arash

“…Laser cooling of a 5 cm long, 1 mm diameter ytterbium doped (6.56×10 ions/m ) silica rod by 67 K from room temperature was achieved. For the pump source, a 100…”
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Optical refrigeration: the role of parasitic absorption at cryogenic temperatures by Volpi, Azzurra, Meng, Junwei, Gragossian, Aram, Albrecht, Alexander R., Rostami, Saeid, Lieto, Alberto Di, Epstein, Richard I., Tonelli, Mauro, Hehlen, Markus P., Sheik-Bahae, Mansoor

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Hybrid membrane-external-cavity surface-emitting laser by Zhang, Mingyang, Albrecht, Alexander R., Nguyen, Catherine, Follman, David, Cole, Garrett D., Sheik-Bahae, Mansoor

“…We develop, analyze, and demonstrate an optically-pumped semiconductor disk laser using an active mirror architecture formed by sandwiching the semiconductor…”
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Potential of ytterbium doped silica glass for solid-state optical refrigeration to below 200 K by Topper, Brian, Neumann, Alexander, Albrecht, Alexander R, Flores, Angel S, Kuhn, Stefan, Häßner, Denny, Hein, Sigrun, Hupel, Christian, Nold, Johannes, Haarlammert, Nicoletta, Schreiber, Thomas, Sheik-Bahae, Mansoor, Mafi, Arash

“…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…”
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Impact of site-selective spectroscopy on laser cooling parameter characterization by Topper, Brian, Kuhn, Stefan, Neumann, Alexander, Albrecht, Alexander R, Flores, Angel S, Hässner, Denny, Hein, Sigrun, Hupel, Christian, Nold, Johannes, Haarlammert, Nicoletta, Schreiber, Thomas, Sheik-Bahae, Mansoor, Mafi, Arash

“…From laser design to optical refrigeration, experimentally measured fluorescence spectra are often utilized to obtain input parameters for predictive models…”
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In-Well Pumping of a Membrane External-Cavity Surface-Emitting Laser by Priante, Davide, Zhang, Mingyang, Albrecht, Alexander R., Bek, Roman, Zimmer, Michael, Nguyen, Catherine L., Follman, David P., Cole, Garrett D., Sheik-Bahae, Mansoor

“…We present a detailed characterization and comparative study of a membrane external-cavity surface-emitting laser (MECSEL) operating in the λ = 1125-1190 nm…”
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First demonstration of an all-solid-state optical cryocooler by Hehlen, Markus P., Meng, Junwei, Albrecht, Alexander R., Lee, Eric R., Gragossian, Aram, Love, Steven P., Hamilton, Christopher E., Epstein, Richard I., Sheik-Bahae, Mansoor

“…Solid-state optical refrigeration uses anti-Stokes fluorescence to cool macroscopic objects to cryogenic temperatures without vibrations. Crystals such as Yb…”
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Bridgman Growth of Laser-Cooling-Grade LiLuF4:Yb3+ Single Crystals by Volpi, Azzurra, Krämer, Karl W, Biner, Daniel, Wiggins, Brenden, Kock, Jackson, Albrecht, Alexander R, Peterson, Eric J, Spilde, Michael N, Sheik-Bahae, Mansoor, Hehlen, Markus P

“…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…”
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Exploring ultrafast negative Kerr effect for mode-locking vertical external-cavity surface-emitting lasers by Albrecht, Alexander R, Wang, Yi, Ghasemkhani, Mohammadreza, Seletskiy, Denis V, Cederberg, Jeffrey G, Sheik-Bahae, Mansoor

“…We present analytical considerations of "self-mode-locked" operation in a typical vertical external-cavity surface-emitting laser (VECSEL) cavity geometry by…”
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Near‐Unity External Quantum Efficiency in GaAs|AlGaAs Heterostructures Grown by Molecular Beam Epitaxy by Giannini, Nathan, Yang, Zhou, Rai, Ashish K., Albrecht, Alexander R., Sheik-Bahae, Mansoor

“…The external quantum efficiency (EQE) of a GaAs|AlGaAs double heterostructure, grown by molecular beam epitaxy, is measured as a function of temperature in the…”
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Intra-cavity cryogenic optical refrigeration using high power vertical external-cavity surface-emitting lasers (VECSELs) by Ghasemkhani, Mohammadreza, Albrecht, Alexander R, Melgaard, Seth D, Seletskiy, Denis V, Cederberg, Jeffrey G, Sheik-Bahae, Mansoor

“…A 7% Yb:YLF crystal is laser cooled to 131 ± 1 K from room temperature by placing it inside the external cavity of a high power InGaAs/GaAs VECSEL operating at…”
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1220-1280-nm Optically Pumped InAs Quantum Dot-Based Vertical External-Cavity Surface-Emitting Laser by Albrecht, A. R., Stintz, A., Jaeckel, F. T., Rotter, T. J., Ahirwar, P., Patel, V. J., Hains, C. P., Lester, L. F., Malloy, K. J., Balakrishnan, G.

“…We report an InAs quantum dot-based optically pumped vertical external-cavity surface-emitting laser (VECSEL), with a continuously variable emission wavelength…”
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Mid-Ir Optical Refrigeration: Optical Cryocoolers and Radiation Balanced Lasers by Rostami, Saeid, Volpi, Azzurra, Albrecht, Alexander R, Tonelli, Mauro, Sheik-Bahae, Mansoor

“…Optical refrigeration in Tm- and Ho-doped crystals is investigated, and their external quantum efficiency, background absorption, and minimum achievable…”
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A Gain-Embedded Meta-Mirror by Yang, Zhou, Lidsky, David, Albrecht, Alexander R, Sheik-Bahae, Mansoor

“…We propose an active mirror structure based on a dielectric high-contrast grating reflector combined with optical gain. This structure is designed to be…”
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Bridgman Growth of Laser-Cooling-Grade LiLuF 4 :Yb 3+ Single Crystals by Volpi, Azzurra, Krämer, Karl W., Biner, Daniel, Wiggins, Brenden, Kock, Jackson, Albrecht, Alexander R., Peterson, Eric J., Spilde, Michael N., Sheik-Bahae, Mansoor, Hehlen, Markus P.

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DBR-free semiconductor disk lasers by Zhou Yang, Albrecht, Alexander R., Cederberg, Jeffrey G., Sheik-Bahae, Mansoor

“…We demonstrate a novel DBR-free semiconductor disk laser, where multiple quantum well active region is fusion bonded directly onto a diamond heat spreader. CW…”
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