Dr. Alexander R. Albrecht Profile

Dr. Alexander R. Albrecht

Research Associate Professor at Univ of New Mexico

SPIE Involvement:

Conference Program Committee | Author

Websites:

Company Website

Profile Summary

Optical Refrigeration, Semiconductor Disk Lasers.

Publications (57)

Proceedings Article | 13 March 2024 Presentation

Advances in MECSEL technology

Mingyang Zhang, Nathan Giannini-Hutchin, Gar-Wing Truong, Garrett Cole, Alexander Albrecht, Mansoor Sheik-Bahae

Proceedings Volume PC12868, PC1286809 (2024) https://doi.org/10.1117/12.3001729

KEYWORDS: Sodium, Silicon carbide, YAG lasers, Wafer bonding, Tunable filters, Solids, Semiconductors, Semiconductor lasers, Optical filters, Mirrors

Read Abstract +

Proceedings Article | 13 March 2024 Presentation

Saturation and power scaling in cryogenic optical refrigeration of Yb:YLF

Jackson Kock, Duncan McGraw, Alexander Neumann, Denis Seletskiy, Alexander Albrecht, Mansoor Sheik-Bahae

Proceedings Volume PC12902, PC1290205 (2024) https://doi.org/10.1117/12.3005373

KEYWORDS: Cryogenics, Spontaneous emission, Scattering, Optical coatings, Fluorescence, Cryocoolers

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Payload cooling to <125K using optical refrigeration in Yb:YLF

Jackson Kock, Alexander Albrecht, Duncan McGraw, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12437, PC1243706 (2023) https://doi.org/10.1117/12.2652253

KEYWORDS: Luminescence, Reflectivity, Optical coatings, Mirrors, Crystals, Cryocoolers

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

A single-mode high-power in-well pumped hybrid-MECSEL at 589 nm

Mingyang Zhang, Alexander Albrecht, Gar-Wing Truong, Garrett Cole, Mansoor Sheik-Bahae

Proceedings Volume 12404, 124040A (2023) https://doi.org/10.1117/12.2649412

KEYWORDS: Silicon carbide, YAG lasers, Thermal efficiency, Sodium guide stars, Sodium, Second-harmonic generation, Optical filters, Fabry–Perot interferometers, Diamond, Chemical species

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Demonstration of diode-pumped optical refrigeration to cryogenic temperature

Alexander Albrecht, Jackson Kock, Seth Melgaard, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12437, PC1243708 (2023) https://doi.org/10.1117/12.2652259

KEYWORDS: Cryogenics, Laser crystals, Crystals, Semiconductor lasers, High power fiber lasers, Fiber coupled lasers, Diodes, Dielectric mirrors, Absorption

Read Abstract +

Proceedings Article | 15 March 2023 Presentation + Paper

Laser cooling silica: current status and future prospects

Brian Topper, Alexander Neumann, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 12437, 1243703 (2023) https://doi.org/10.1117/12.2655228

KEYWORDS: Ytterbium, Silica, Fluorescence, Glasses, Aluminum, Spectroscopy, Emission wavelengths, Air force, Absorption, Temperature metrology

Read Abstract +

Proceedings Article | 9 March 2022 Presentation

Advances in the optical refrigeration of silica: cooling by 18 K from room temperature

Brian Topper, Mostafa Peysokhan, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume PC12018, PC1201808 (2022) https://doi.org/10.1117/12.2610103

KEYWORDS: Silica, Optical fibers, Ytterbium, Temperature metrology, Thermometry, Optical amplifiers, Luminescence, High power fiber amplifiers, Glasses, Cameras

Read Abstract +

Proceedings Article | 9 March 2022 Presentation

Power scaling of Yb-based optical cryo-coolers

Jackson Kock, Azzurra Volpi, Alexander Albrecht, Duncan McGraw, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12018, PC1201803 (2022) https://doi.org/10.1117/12.2611600

KEYWORDS: Crystals, Luminescence, Laser scattering, Laser crystals, Algorithm development, Thermometry, Scattering, Reflection, Modeling, Mirror mounts

Read Abstract +

Proceedings Article | 4 March 2022 Presentation + Paper

High-power in-well pumped MECSEL emitting at 1178 nm for sodium guide star applications

Mingyang Zhang, Davide Priante, Alexander Albrecht, Garrett Cole, Mansoor Sheik-Bahae

Proceedings Volume 11984, 1198403 (2022) https://doi.org/10.1117/12.2609740

KEYWORDS: Quantum wells, Semiconductor lasers, Silicon carbide, Diamond, Aspheric lenses, Sodium guide stars, Absorption, Laser guide stars, Gallium arsenide

Read Abstract +

Proceedings Article | 4 March 2022 Presentation

Anti-Stokes fluorescence cooling of ytterbium doped silica glass for radiation-balanced fiber lasers

Proceedings Volume PC11981, PC119810N (2022) https://doi.org/10.1117/12.2615241

KEYWORDS: Fiber lasers, Silica, Ytterbium, Luminescence, Glasses

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

High-power DBR-free VECSELs emitting at 1178 nm for sodium guide star applications

Davide Priante, Mingyang Zhang, Alexander Albrecht, David Follman, Catherine Nguyen, Garrett Cole, Mansoor Sheik-Bahae

Proceedings Volume 11704, 117040G (2021) https://doi.org/10.1117/12.2578600

KEYWORDS: Sodium guide stars, Semiconductors, Semiconductor lasers, Surveillance, Stellar astronomy, Silicon carbide, Second-harmonic generation, Resistance, Light emitting diodes

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Anti-Stokes fluorescence cooling of a Yb-doped silica glass preform using a high-power laser

Esmaeil Mobini, Saeid Rostami, Mostafa Peysokhan, Alexander Albrecht, Stefan Kuhn, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Angel Flores, Andreas Tünnermann, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 11702, 1170208 (2021) https://doi.org/10.1117/12.2579925

KEYWORDS: Silica, Glasses, Luminescence, High power lasers, Optical fibers, Optical amplifiers, High power fiber amplifiers, Absorption, High power fiber lasers, Fiber lasers

Read Abstract +

Proceedings Article | 5 March 2021 Presentation + Paper

Mode scaling in radiation balanced disk lasers for various gain materials

Azzurra Volpi, Jackson Kock, Alexander Albrecht, Saeid Rostami, Markus Hehlen, Mansoor Sheik-Bahae

Proceedings Volume 11702, 117020U (2021) https://doi.org/10.1117/12.2582831

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Bridgman growth of LLF:Yb single-crystals for laser cooling and radiation-balanced lasers

Azzurra Volpi, Jackson Kock, Alexander Albrecht, Mansoor Sheik-Bahae, Markus Hehlen

Proceedings Volume 11702, 117020Q (2021) https://doi.org/10.1117/12.2582835

KEYWORDS: Crystals, Optical spectroscopy

Read Abstract +

Proceedings Article | 17 March 2020 Presentation

Crystal growth and characterization of Yb3+-doped LiLuF4 for radiation-balanced lasers (Conference Presentation)

Azzurra Volpi, Daniel Biner, Karl Krämer, Alexander Albrecht, Mansoor Sheik-Bahae, Markus Hehlen

Proceedings Volume 11298, 112980A (2020) https://doi.org/10.1117/12.2543608

KEYWORDS: Crystals, Laser crystals, Carbon, Scanning electron microscopy, Laser development, Laser induced fluorescence, Contamination, Crystallography, Temperature metrology, Cameras

Read Abstract +

Proceedings Article | 9 March 2020 Presentation

The role of absorption saturation in optical refrigeration (Conference Presentation)

Azzurra Volpi, Jackson Kock, Alexander Albrecht, Markus Hehlen, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 11298, 1129809 (2020) https://doi.org/10.1117/12.2547681

KEYWORDS: Absorption, Temperature metrology, Cryogenics, Crystals

Read Abstract +

Proceedings Article | 9 March 2020 Presentation

Advances in optical cryo-cooler device development (Conference Presentation)

Jackson Kock, Junwei Meng, Azzurra Volpi, Alexander Albrecht, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 11298, 1129808 (2020) https://doi.org/10.1117/12.2547614

KEYWORDS: Crystals, Thermography, Absorption, Magnesium fluoride, Cryocoolers, Laser crystals, Crystallography, Optical coatings, Silicon

Read Abstract +

Proceedings Article | 9 March 2020 Presentation

Observation of anti-Stokes fluorescence cooling of ytterbium-doped silica glass (Conference Presentation)

Proceedings Volume 11298, 112980G (2020) https://doi.org/10.1117/12.2545233

KEYWORDS: Luminescence, Silica, Glasses, Fiber amplifiers, Optical amplifiers, Fiber lasers, Laser damage threshold, High power lasers, High power fiber amplifiers, ZBLAN

Read Abstract +

Proceedings Article | 24 February 2020 Presentation + Paper

Power scaling of mid-IR optical refrigeration and radiation balanced lasers

Saeid Rostami, Alexander Albrecht, Arash Mafi, Mansoor Sheik-Bahae

Proceedings Volume 11298, 112980C (2020) https://doi.org/10.1117/12.2545509

KEYWORDS: Crystals, Mid-IR, Laser crystals, Absorption, Mirrors, Luminescence, Ions, Temperature metrology, Fiber amplifiers, Optical parametric oscillators

Read Abstract +

Proceedings Article | 13 March 2019 Presentation

16 W DBR-free semiconductor disk laser using dual-SiC-heatspreader (Conference Presentation)

Zhou Yang, David Follman, Dominic Bachmann, Paula Heu, Alexander Albrecht, Garrett Cole, Mansoor Sheik-Bahae

Proceedings Volume 10901, 109010B (2019) https://doi.org/10.1117/12.2508856

KEYWORDS: Semiconductors, Semiconductor lasers, Disk lasers, Distributed Bragg reflectors, Resistance, Thermal analysis, Thermal efficiency, Silicon carbide

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Cryocooling arbitrary payloads: optical refrigeration coming of age (Conference Presentation)

Junwei Meng, Alexander Albrecht, Azzurra Volpi, Markus Hehlen, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 10936, 109360C (2019) https://doi.org/10.1117/12.2508825

KEYWORDS: Crystals, Mercury cadmium telluride, Infrared sensors, Environmental sensing, Luminescence, Thermography, Thermal modeling

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Radiation-balanced thin-disk lasers in Yb:YAG and Yb:YLF (Conference Presentation)

Zhou Yang, Junwei Meng, Alexander Albrecht, Jackson Kock, Mansoor Sheik-Bahae

Proceedings Volume 10936, 109360O (2019) https://doi.org/10.1117/12.2508907

KEYWORDS: Absorption, High power lasers

Read Abstract +

Proceedings Article | 1 March 2019 Presentation + Paper

Bridgman growth of LiYF4 and LiLuF4 crystals for radiation-balanced lasers

Azzurra Volpi, Junwei Meng, Alexander Albrecht, Mansoor Sheik-Bahae, Daniel Biner, Karl Krämer, Markus Hehlen

Proceedings Volume 10936, 109360P (2019) https://doi.org/10.1117/12.2510691

KEYWORDS: Crystals, Laser induced fluorescence, Laser crystals, Solid state lasers, Ytterbium, Scanning electron microscopy

Read Abstract +

Proceedings Article | 1 March 2019 Presentation + Paper

Progress towards optical cryocooling in Mid-IR

Saeid Rostami, Azzurra Volpi, Alexander Albrecht, Mansoor Sheik-Bahae

Proceedings Volume 10936, 109360H (2019) https://doi.org/10.1117/12.2509017

KEYWORDS: Crystals, Mid-IR, Laser crystals, Absorption, Luminescence, Optical parametric oscillators, Fiber lasers, Mirrors, Holmium, External quantum efficiency, Solid state lasers, Diode pumped solid state lasers, Fluorescence spectroscopy, Absorption spectroscopy, Thermal effects

Read Abstract +

Proceedings Article | 9 May 2018 Presentation + Paper

Realization of an all-solid-state cryocooler using optical refrigeration

Junwei Meng, Alexander Albrecht, Aram Gragossian, Eric Lee, Azzurra Volpi, Mohammadreza Ghasemkhani, Markus Hehlen, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 10626, 106260B (2018) https://doi.org/10.1117/12.2305195

KEYWORDS: Crystals, Luminescence, Absorption, Laser crystals, Mirrors, Cryocoolers, Silicon, Thermography, Temperature sensors, Ytterbium

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Advances in mid-IR solid-state optical cooling and radiation-balanced lasers (Conference Presentation)

Saeid Rostami, Zhou Yang, Alexander Albrecht, Aram Gragossian, Mostafa Peysokhan, Mohammadreza Ghasemkhani, Azzurra Volpi, Mauro Tonelli, Mansoor Sheik-Bahae

Proceedings Volume 10550, 105500Q (2018) https://doi.org/10.1117/12.2292267

KEYWORDS: Mid-IR, Crystals, Laser crystals, Solid state lasers, Solid state physics, Laser optics, External quantum efficiency, Optical cooling, Cryocoolers, High power lasers

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Bridgman growth of fluoride crystals for radiation-balanced lasers (Conference Presentation)

Markus Hehlen, Azzurra Volpi, Junwei Meng, Alexander Albrecht, Mansoor Sheik-Bahae

Proceedings Volume 10550, 1055007 (2018) https://doi.org/10.1117/12.2284732

KEYWORDS: Crystals, Laser crystals, Solid state lasers, External quantum efficiency, Absorption, Crystal optics, Ytterbium, Solid state physics, Thermography, Material purity

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Investigation of temperature dependence of quantum efficiency and parasitic absorption in rare-earth doped crystals (Conference Presentation)

Aram Gragossian, Azzurra Volpi, Junwei Meng, Alexander Albrecht, Saeid Rostami, Markus Hehlen, Mansoor Sheik-Bahae

Proceedings Volume 10550, 1055006 (2018) https://doi.org/10.1117/12.2292265

KEYWORDS: Temperature metrology, Absorption, Crystals, Luminescence, Quantum efficiency, Crystal optics, Lasers, Solid state electronics, Measurement devices, External quantum efficiency

Read Abstract +

Proceedings Article | 22 February 2018 Presentation + Paper

Investigation of radiation-balanced disk lasers

Zhou Yang, Alexander Albrecht, Junwei Meng, Mansoor Sheik-Bahae

Proceedings Volume 10550, 105500B (2018) https://doi.org/10.1117/12.2292264

KEYWORDS: Crystals, Laser crystals, Luminescence, Absorption, Disk lasers, Laser resonators, Absorbance

Read Abstract +

Proceedings Article | 22 February 2018 Presentation + Paper

Understanding the origin of parasitic absorption in GaAs double heterostructures

Nathan Giannini, Zhou Yang, Alexander Albrecht, Mansoor Sheik-Bahae

Proceedings Volume 10550, 105500F (2018) https://doi.org/10.1117/12.2292269

KEYWORDS: Absorption, External quantum efficiency, Luminescence, Heterojunctions, Indium gallium phosphide, Gallium arsenide

Read Abstract +

Proceedings Article | 7 June 2017 Presentation

Recent advances in optical refrigeration of a load (Conference Presentation)

Aram Gragossian, Junwei Meng, Mohammadreza Ghasemkhani, Alexander Albrecht, Eric Lee, Bernardo Farfan, Guy Symonds, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 10180, 101800B (2017) https://doi.org/10.1117/12.2266159

KEYWORDS: Solids, Cryocoolers, Crystals, Laser crystals, Thermal efficiency, Luminescence, Prototyping, Thermography, Thermodynamics, Current controlled current source

Read Abstract +

Proceedings Article | 21 April 2017 Presentation

Development of optically pumped DBR-free semiconductor disk lasers (Conference Presentation)

Zhou Yang, Alexander Albrecht, Jeffrey Cederberg, Mansoor Sheik-Bahae

Proceedings Volume 10087, 100870K (2017) https://doi.org/10.1117/12.2251652

KEYWORDS: Semiconductors, Disk lasers, Semiconductor lasers, Thermal effects, Optical pumping, Optical semiconductors, Integrated modeling, Silica, Prisms, Reflectivity

Read Abstract +

Proceedings Article | 20 April 2017 Presentation

Advances in laser cooling of Tm:YLF crystals (Conference Presentation)

Saeid Rostami, Alexander Albrecht, Mauro Tonelli, Mansoor Sheik-Bahae

Proceedings Volume 10121, 1012105 (2017) https://doi.org/10.1117/12.2254656

KEYWORDS: High power lasers, Tunable lasers, Quantum efficiency, Temperature metrology, Crystals, Laser crystals, External quantum efficiency, Optical parametric oscillators, Absorption

Read Abstract +

Proceedings Article | 20 April 2017 Presentation

Enhanced cooling of Yb:YLF using astigmatic Herriott cell (Conference Presentation)

Aram Gragossian, Junwei Meng, Mohammadreza Ghasemkhani, Alexander Albrecht, Mauro Tonelli, Mansoor Sheik-Bahae

Proceedings Volume 10121, 1012101 (2017) https://doi.org/10.1117/12.2254623

KEYWORDS: Absorption, Crystals, External quantum efficiency, Luminescence, Spherical lenses, Mirrors, Temperature metrology, Solids, Cryogenics, Laser crystals

Read Abstract +

Proceedings Article | 17 February 2017 Presentation + Paper

Investigation into the origin of parasitic absorption in GaInP/GaAs double heterostructures

Nathan Giannini, Zhou Yang, Alexander Albrecht, Mansoor Sheik-Bahae

Proceedings Volume 10121, 101210F (2017) https://doi.org/10.1117/12.2254702

KEYWORDS: Absorption, Interfaces, Gallium arsenide, Indium gallium phosphide, Heterojunctions, External quantum efficiency, Semiconductors, Absorbance, Calibration, Calorimetry, Luminescence

Read Abstract +

SPIE Journal Paper | 16 December 2016

Astigmatic Herriott cell for optical refrigeration

Aram Gragossian, Junwei Meng, Mohammadreza Ghasemkhani, Alexander Albrecht, Mansoor Sheik-Bahae

OE, Vol. 56, Issue 01, 011110, (December 2016) https://doi.org/10.1117/12.10.1117/1.OE.56.1.011110

KEYWORDS: Crystals, Mirrors, Absorption, Laser crystals, Temperature metrology, Spherical lenses, Luminescence, High power fiber lasers, Optical engineering, Sapphire

Read Abstract +

Proceedings Article | 27 July 2016 Paper

Development of vertical external cavity surface emitting lasers (VECSELs) for use as monochromatic and polychromatic sodium guidestars

Shawn Hackett, Alexander Albrecht, Zhou Yang, Jeffrey Cederberg, Mansoor Sheik-Bahae, John McGraw, Robert Johnson, Jeff Richey

Proceedings Volume 9909, 99095R (2016) https://doi.org/10.1117/12.2239240

KEYWORDS: Sodium guide stars, Laser guide stars, Vertical external cavity surface emitting lasers, Sodium, Continuous wave operation, Lamps, Absorption, Fabry–Perot interferometers, High power lasers

Read Abstract +

Proceedings Article | 17 May 2016 Paper

Cooling enhancement in optical refrigeration by non-resonant optical cavities

B. Farfan, A. Gragossian, G. Symonds, M. Ghasemkhani, A. Albrecht, M. Sheik-Bahae, R. Epstein

Proceedings Volume 9821, 982104 (2016) https://doi.org/10.1117/12.2222181

KEYWORDS: Mirrors, Optical resonators, Absorption, Crystals, Spherical lenses, Ray tracing, Luminescence, Optics manufacturing, Semiconductor lasers, Manufacturing

Read Abstract +

Proceedings Article | 23 March 2016 Paper

Thermal management and design for optical refrigeration

G. Symonds, B. Farfan, M. Ghasemkhani, A. Albrecht, M. Sheik-Bahae, R. Epstein

Proceedings Volume 9765, 97650N (2016) https://doi.org/10.1117/12.2217964

KEYWORDS: Crystals, Sapphire, Thermography, Solids, Mirrors, Optical design, Epoxies, Luminescence, Optical cooling, Absorption

Read Abstract +

Proceedings Article | 10 March 2016 Paper

Vertical external cavity surface emitting lasers for sodium guidestar applications and improvement of current guidestar systems

Shawn Hackett, Alexander Albrecht, Zhou Yang, Jeffrey Cederberg, Mansoor Sheik-Bahae, Robert Johnson, Jack Drummond

Proceedings Volume 9734, 97340Y (2016) https://doi.org/10.1117/12.2216853

KEYWORDS: Sodium guide stars, Vertical external cavity surface emitting lasers, Second-harmonic generation, Sodium, Telescopes, Systems modeling, Optical pumping, Laser applications, Laser guide stars, Crystals, Data modeling, Chemical species, Mathematical modeling, Performance modeling

Read Abstract +

Proceedings Article | 10 March 2016 Paper

Broadly tunable DBR-free semiconductor disk laser

Zhou Yang, Alexander Albrecht, Jeffrey Cederberg, Shawn Hackett, Mansoor Sheik-Bahae

Proceedings Volume 9734, 97340I (2016) https://doi.org/10.1117/12.2213348

KEYWORDS: Semiconductors, Semiconductor lasers, Disk lasers, Diamond, Tunable lasers, Optical components, Quantum wells, Mirrors, Reflectivity, Gallium arsenide, Indium gallium arsenide

Read Abstract +

Proceedings Article | 7 March 2016 Paper

Optical refrigeration of Tm:YLF and Ho:YLF crystals

Saeid Rostami, Alexander Albercht, Mohammad Ghasemkhani, Seth Melgaard, Aram Gragossian, Mauro Tonelli, Mansoor Sheik-Bahae

Proceedings Volume 9765, 97650P (2016) https://doi.org/10.1117/12.2213568

KEYWORDS: Crystals, Optical parametric oscillators, Laser crystals, High power lasers, Solids, Luminescence, Ions, Continuous wave operation, Tunable lasers, Absorption, Fluorescence spectroscopy, Lanthanides, Optical cooling, Optical spectroscopy, Thermal imaging cameras, Thulium, Mirrors, Holmium, Temperature metrology

Read Abstract +

Proceedings Article | 7 March 2016 Paper

Non-resonant optical cavity design for optical refrigeration

B. Farfan, G. Symonds, A. Gragossian, M. Ghasemkhani, A. Albrecht, M. Sheik-Bahae, R. Epstein

Proceedings Volume 9765, 97650Q (2016) https://doi.org/10.1117/12.2217519

KEYWORDS: Optical design, Reflectivity, Mirrors, Light, Fiber lasers, Manufacturing, Crystals, Absorption, Spherical lenses, Optics manufacturing, Ray tracing, Luminescence

Read Abstract +

Proceedings Article | 10 March 2015 Paper

High sensitivity background absorption measurements in semiconductors

Nathan Giannini, Junior Silva, Chengao Wang, Alexander Albrecht, Seth Melgaard, Mansoor Sheik-Bahae

Proceedings Volume 9380, 93800F (2015) https://doi.org/10.1117/12.2080087

KEYWORDS: Absorption, External quantum efficiency, Gallium arsenide, Calibration, Zinc, Semiconductors, Interfaces, Indium gallium phosphide, Absorbance, Neodymium

Read Abstract +

Proceedings Article | 10 March 2015 Paper

Intracavity-enhanced optical refrigeration of Yb:YLF crystal to cryogenic temperatures

Mohammadreza Ghasemkhani, Alexander Albrecht, Seth Melgaard, Denis Seletskiy, Jeffrey Cedeberg, Mansoor Sheik-Bahae

Proceedings Volume 9380, 938003 (2015) https://doi.org/10.1117/12.2080343

KEYWORDS: Absorption, Crystals, Fabry–Perot interferometers, Luminescence, Mirrors, Reflectivity, Solids, Laser crystals, Ions, Cryogenics

Read Abstract +

Proceedings Article | 4 March 2015 Paper

DBR-free optically pumped semiconductor disk lasers

Zhou Yang, Alexander Albrecht, Jeffrey Cederberg, Mansoor Sheik-Bahae

Proceedings Volume 9349, 934905 (2015) https://doi.org/10.1117/12.2079696

KEYWORDS: Semiconductors, Semiconductor lasers, Diamond, Disk lasers, Optical pumping, Optical semiconductors, Reflection, Prisms, Quantum wells

Read Abstract +

Proceedings Article | 7 March 2014 Paper

Exploring ultrafast negative Kerr Effect for self-mode-locking vertical external-cavity surface-emitting lasers

Alexander Albrecht, Denis Seletskiy, Yi Wang, Jeffrey Cederberg, Mansoor Sheik-Bahae

Proceedings Volume 8966, 896604 (2014) https://doi.org/10.1117/12.2040072

KEYWORDS: Mirrors, Mode locking, Kerr effect, Dispersion, Ultrafast phenomena, Semiconductors, Oscilloscopes, Continuous wave operation, Picosecond phenomena, Indium gallium arsenide

Read Abstract +

Proceedings Article | 3 March 2014 Paper

Beam combination of multiple vertical external cavity surface emitting lasers via volume Bragg gratings

Chunte Lu, William Roach, Genesh Balakrishnan, Alexander Albrecht, Jerome Moloney, Leonid Glebov

Proceedings Volume 8966, 89660Y (2014) https://doi.org/10.1117/12.2039666

KEYWORDS: Reflectivity, Vertical external cavity surface emitting lasers, Fiber Bragg gratings, Holography, Diffraction, Output couplers, Optical design, Near infrared, Multiplexing, Optical filters

Read Abstract +

Proceedings Article | 19 February 2014 Paper

Intracavity optical refrigeration to 131K using high-power vertical external-cavity surface-emitting lasers (VECSELs)

Mohammadreza Ghasemkhani, Alexander Albrecht, Seth Melgaard, Denis Seletskiy, Jeffrey Cedeberg, Mansoor Sheik-Bahae

Proceedings Volume 9000, 900005 (2014) https://doi.org/10.1117/12.2040116

KEYWORDS: Absorption, Crystals, High power lasers, Luminescence, Laser crystals, Optical filters, Photons, Ions, External quantum efficiency, Temperature metrology

Read Abstract +

Proceedings Article | 11 March 2013 Paper

Progress towards cryogenic temperatures in intra-cavity optical refrigeration using a VECSEL

Alexander Albrecht, Mohammadreza Ghasemkhani, Jeffrey Cederberg, Denis Seletskiy, Seth Melgaard, Mansoor Sheik-Bahae

Proceedings Volume 8638, 863805 (2013) https://doi.org/10.1117/12.2005098

KEYWORDS: Crystals, Laser crystals, Luminescence, Cryogenics, Optical filters, Absorption, Laser optics, Semiconductor lasers, Physics, High power lasers

Read Abstract +

Proceedings Article | 26 February 2013 Paper

Intracavity-enhanced laser cooling of solids using high power VECSELs at 1020 nm

Mansoor Sheik-Bahae, Mohammad Ghasemkhani, Alexander Albrecht, Denis Seletskiy, Jeffrey Cederberg, Seth Melgaard

Proceedings Volume 8606, 86060A (2013) https://doi.org/10.1117/12.2003561

KEYWORDS: Crystals, Absorption, Luminescence, Solids, Laser crystals, High power lasers, Cryocoolers, Temperature metrology, Cryogenics, External quantum efficiency

Read Abstract +

Proceedings Article | 8 February 2012 Paper

Intracavity laser cooling using a VECSEL

Alexander Albrecht, Denis Seletskiy, Jeffrey Cederberg, Alberto Di Lieto, Mauro Tonelli, Jerome Moloney, Ganesh Balakrishnan, Mansoor Sheik-Bahae

Proceedings Volume 8275, 827505 (2012) https://doi.org/10.1117/12.910329

KEYWORDS: Crystals, Mirrors, Quantum wells, Luminescence, Absorption, Cryocoolers, Solids, Laser crystals, Semiconductors, Laser applications

Read Abstract +

Proceedings Article | 22 February 2011 Paper

Lattice mismatched growth for mid-IR VECSELs

G. Balakrishnan, T. Rotter, P. Ahirwar, S. Clark, V. Patel, A. Albrecht, C. Hains, Yi-Ying Lai, T. Wang, J. Yarborough, D. Mathine, Yushi Kaneda, Jerome Moloney, Jörg Hader, S. Koch

Proceedings Volume 7919, 79190G (2011) https://doi.org/10.1117/12.874234

KEYWORDS: Gallium arsenide, Gallium antimonide, Quantum wells, Mid-IR, Interfaces, Distributed Bragg reflectors, Epitaxy, Antimony, Semiconducting wafers, Crystals

Read Abstract +

Proceedings Article | 22 February 2011 Paper

High-power 1.25 µm InAs QD VECSEL based on resonant periodic gain structure

Alexander Albrecht, Thomas Rotter, Christopher Hains, Andreas Stintz, Guofeng Xin, Tsuei-Lian Wang, Yushi Kaneda, Jerome Moloney, Kevin Malloy, Ganesh Balakrishnan

Proceedings Volume 7919, 791904 (2011) https://doi.org/10.1117/12.874321

KEYWORDS: Indium arsenide, Gallium arsenide, Diamond, Chemical vapor deposition, Mirrors, Semiconductor lasers, Heatsinks, Quantum dots, Indium, Output couplers

Read Abstract +

Proceedings Article | 18 February 2009 Paper

Photoluminescence investigation of InAs quantum dots incorporating DWELL structures on patterned and planar GaAs (100) substrate

B. Liang, P. S. Wong, B. V. Dorogan, J. Tatebayashi, A. Albrecht, H. Xiang, Yu. Mazur, G. Salamo, S. R. Brueck, D. Huffaker

Proceedings Volume 7224, 722409 (2009) https://doi.org/10.1117/12.809784

KEYWORDS: Quantum wells, Gallium arsenide, Indium gallium arsenide, Indium arsenide, Picosecond phenomena, Integration, Luminescence, Quantum dots, Temperature metrology, Scanning electron microscopy

Read Abstract +

Proceedings Article | 13 March 2007 Paper

Phase fluorometry for semiconductor lifetime measurement

Alexander Albrecht, Ramesh Laghumavarapu, Babak Imangholi, Mansoor Sheik-Bahae, Kevin Malloy

Proceedings Volume 6461, 646108 (2007) https://doi.org/10.1117/12.710064

KEYWORDS: Semiconductor lasers, Semiconductors, Luminescence, Modulation, Phase measurement, Phase shifts, Temperature metrology, Optical amplifiers, Heterojunctions, Metalorganic chemical vapor deposition

Read Abstract +

Proceedings Article | 7 March 2007 Paper

Growth and characterization of GaAs/InGaP heterostructure for semiconductor laser cooling

R. Laghumavarapu, N. Nuntawong, A. Albrecht, D. Huffaker

Proceedings Volume 6461, 64610M (2007) https://doi.org/10.1117/12.708337

KEYWORDS: Gallium arsenide, Indium gallium phosphide, Interfaces, Semiconductor lasers, Temperature metrology, Heterojunctions, Metalorganic chemical vapor deposition, X-ray diffraction, Gallium, Solids

Read Abstract +

Showing 5 of 57 publications

Conference Committee Involvement (4)

Photonic Heat Engines: Science and Applications VII

29 January 2025 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) XIV

28 January 2025 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII

31 January 2024 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) XII

31 January 2023 | San Francisco, California, United States

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years