Dr. Raymond J. Beach Profile

Dr. Raymond J. Beach

at Lawrence Livermore National Lab

SPIE Involvement:

Author

Publications (41)

Proceedings Article | 10 June 2024 Presentation

Transparent ceramic gain media

Steve Payne, Nerine Cherepy, Ross Osborne, Thomas Rudzik, Alexander Drobshoff, Zachary Seeley, Timothy Yee, Tyler Wineger, Raymond Beach, Jun Zhang, Mark Dubinskii

Proceedings Volume PC13029, PC130290A (2024) https://doi.org/10.1117/12.3018945

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Proceedings Article | 7 June 2024 Presentation + Paper

Self Q-switched Nd, Cr:YAG transparent ceramics

Ross Osborne, Alexander Drobshoff, Nerine Cherepy, Raymond Beach, Stephen Payne

Proceedings Volume 13029, 1302905 (2024) https://doi.org/10.1117/12.3019086

KEYWORDS: Chromium, Neodymium, Annealing, Rod lasers, Ceramics, Absorption, Q switched lasers, Q switching, Nd:YAG lasers, Diodes

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SPIE Journal Paper | 23 December 2017 Open Access

Polarization effects associated with thermal processing of HY-80 structural steel using high-power laser diode array

Sheldon S.Q. Wu, Bradford Baker, Mark Rotter, Alexander Rubenchik, Maxwell Wiechec, Zachary Brown, Raymond Beach, Manyalibo Matthews

OE, Vol. 56, Issue 12, 124108, (December 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.12.124108

KEYWORDS: Thermal effects, Semiconductor lasers, Polarization, Diodes, Iron, Temperature metrology, High power lasers, Laser applications, Metals, Cameras

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Proceedings Article | 4 May 2010 Paper

Power scaling analysis of fiber lasers and amplifiers based on non-silica materials

Jay Dawson, Michael Messerly, John Heebner, Paul Pax, Arun Sridharan, Amber Bullington, Raymond Beach, Craig Siders, C. P. Barty, Mark Dubinskii

Proceedings Volume 7686, 768611 (2010) https://doi.org/10.1117/12.852393

KEYWORDS: Fiber lasers, Silica, YAG lasers, Thermal effects, Optical fibers, Fiber amplifiers, Laser scattering, Raman scattering, Glasses, Raman spectroscopy

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Proceedings Article | 12 May 2008 Paper

Resonance transition 795-nm rubidium laser using He buffer gas

Sheldon S. Wu, Thomas Soules, Ralph Page, Scott Mitchell, V. Keith Kanz, Raymond Beach

Proceedings Volume 7005, 700523 (2008) https://doi.org/10.1117/12.782376

KEYWORDS: Rubidium, Semiconductor lasers, Data modeling, Reflectivity, Output couplers, Laser resonators, Systems modeling, Diodes, Carbon, Reliability

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Proceedings Article | 21 February 2008 Paper

Hydrocarbon-free resonance transition 795-nm rubidium laser

Sheldon Wu, Thomas Soules, Ralph Page, Scott Mitchell, V. Keith Kanz, Raymond Beach

Proceedings Volume 6874, 68740E (2008) https://doi.org/10.1117/12.765592

KEYWORDS: Rubidium, Semiconductor lasers, Data modeling, Reflectivity, Output couplers, Laser resonators, Diodes, Carbon, Reliability, Sapphire lasers

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Proceedings Article | 23 February 2006 Paper

High energy short pulse fiber laser front end for kilo-Joule class CPA systems

J. Dawson, S. Mitchell, R. Beach, M. Messerly, C. Siders, H. Phan, C. Barty

Proceedings Volume 6102, 610214 (2006) https://doi.org/10.1117/12.644950

KEYWORDS: Fiber lasers, Fiber amplifiers, Laser systems engineering, Pulsed laser operation, National Ignition Facility, Picosecond phenomena, Mode locking, Optical amplifiers, Bragg cells, Fourier transforms

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Proceedings Article | 23 February 2006 Paper

Multi-watt 589nm fiber laser source

Jay Dawson, Alex Drobshoff, Raymond Beach, Michael Messerly, Stephen Payne, Aaron Brown, Deanna Pennington, Douglas Bamford, Scott Sharpe, David Cook

Proceedings Volume 6102, 61021F (2006) https://doi.org/10.1117/12.644947

KEYWORDS: Fiber lasers, Fiber amplifiers, Crystals, Laser systems engineering, Neodymium, Pulsed laser operation, Semiconductor lasers, Optical amplifiers, Polarization, Modulation

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Proceedings Article | 22 April 2005 Paper

Fiber laser front ends for high-energy short pulse lasers

Jay Dawson, Zhi Liao, Scott Mitchell, Michael Messerly, Raymond Beach, Igor Jovanovic, Curtis Brown, Stephen Payne, C. Barty

Proceedings Volume 5709, (2005) https://doi.org/10.1117/12.591147

KEYWORDS: Fiber lasers, Pulsed laser operation, Laser systems engineering, Amplifiers, Fiber amplifiers, Oscillators, Polarization, Mode locking, National Ignition Facility, Glasses

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Proceedings Article | 22 April 2005 Paper

469-nm fiber laser source

Alex Drobshoff, Jay Dawson, Deanna Pennington, Stephen Payne, Raymond Beach, Luke Taylor

Proceedings Volume 5709, (2005) https://doi.org/10.1117/12.591171

KEYWORDS: Fiber amplifiers, Crystals, Semiconductor lasers, Oscillators, Fiber lasers, Neodymium, Optical amplifiers, Cladding, Diodes, Collimation

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Proceedings Article | 12 January 2005 Paper

Unique high-power fiber laser technologies

William Neuman, Deanna Pennington, Jay Dawson, Alex Drobshoff, Raymond Beach, Igor Jovanovic, Zhi Liao, Stephan Payne, C. Barty

Proceedings Volume 5653, (2005) https://doi.org/10.1117/12.581425

KEYWORDS: Fiber lasers, Fiber amplifiers, Optical amplifiers, Absorption, Laser systems engineering, Optical fibers, Cladding, Amplifiers, Neodymium, Ytterbium

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Proceedings Article | 20 September 2004 Paper

New class of cw high-power diode-pumped alkali lasers (DPALs) (Plenary Paper)

William Krupke, Raymond Beach, Vernon Kanz, Stephen Payne, James Early

Proceedings Volume 5448, (2004) https://doi.org/10.1117/12.547954

KEYWORDS: Rubidium, Semiconductor lasers, Cesium, Diodes, Chemical species, Helium, Solar cells, Potassium, Continuous wave operation, Silicon

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Proceedings Article | 8 July 2004 Paper

Initial operation of the mercury laser: a gas-cooled 10-Hz Yb:S-FAP system

Camille Bibeau, Andy Bayramian, Raymond Beach, Robert Campbell, Adrian DeWald, Wilburt Davis, Jay Dawson, Larain DiMercurio, Christopher Ebbers, Barry Freitas, Michael Hill, Kevin Hood, V. Keith Kanz, Joseph Menapace, Stephen Payne, Mark Randles, Jon Rankin, Kathleen Schaffers, Christopher Stoltz, John Tassano, Steve Telford, Everett Utterback

Proceedings Volume 5332, (2004) https://doi.org/10.1117/12.538414

KEYWORDS: Optical amplifiers, Diodes, Mercury, Semiconductor lasers, Diffraction, Diagnostics, Fusion energy, Wavefronts, Wavefront distortions, Crystals

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Proceedings Article | 7 June 2004 Paper

Large flattened-mode optical fiber for reduction of nonlinear effects in optical fiber lasers

Jay Dawson, Raymond Beach, Igor Jovanovic, Benoit Wattellier, Zhi Liao, Stephen Payne, Christopher Barty

Proceedings Volume 5335, (2004) https://doi.org/10.1117/12.529746

KEYWORDS: Fiber amplifiers, Optical fibers, Amplifiers, Optical amplifiers, Fiber lasers, Refractive index, Nonlinear optics, Waveguide modes, Raman scattering, Raman spectroscopy

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Proceedings Article | 11 May 2004 Paper

DPAL: a new class of CW near-infrared high-power diode-pumped alkali (vapor) lasers

William Krupke, Raymond Beach, Vernon Kanz, Stephen Payne

Proceedings Volume 5334, (2004) https://doi.org/10.1117/12.537984

KEYWORDS: Helium, Rubidium, Cesium, Semiconductor lasers, Potassium, Chemical species, Diodes, Reflectivity, Capillaries, Planar waveguides

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Proceedings Article | 3 July 2003 Paper

High-power 938-nm cladding pumped fiber laser

Jay Dawson, Alex Drobshoff, Zhi Liao, Raymond Beach, Deanna Pennington, Stephen Payne, Luke Taylor, Wolfgang Hackenberg, Domenico Bonaccini

Proceedings Volume 4974, (2003) https://doi.org/10.1117/12.478270

KEYWORDS: Fiber lasers, Fiber amplifiers, Optical amplifiers, Cladding, Neodymium, Absorption, Optical fibers, Signal attenuation, Semiconductor lasers, Ions

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Proceedings Article | 3 July 2003 Paper

Ribbon fiber with multiple antiguided phase-locked gain cores

Raymond Beach, Michael Feit, Scott Mitchell, Kurt Cutter, Jay Dawson, Stephen Payne, Richard Mead, Joseph Hayden, David Krashkevich, David Alunni

Proceedings Volume 4974, (2003) https://doi.org/10.1117/12.478275

KEYWORDS: Waveguides, Glasses, Refractive index, Structured optical fibers, Cladding, Near field, Fiber lasers, Silica, Prototyping, Mode locking

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Proceedings Article | 3 April 2000 Paper

High-average-power diode-pumped Yb:YAG lasers

Raymond Beach, Eric Honea, Steven Sutton, Camille Bibeau, Jay Skidmore, Mark Emanuel, Stephen Payne, Petras Avizonis, R. Monroe, Dennis Harris

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380891

KEYWORDS: Rod lasers, Diodes, Semiconductor lasers, Polishing, Laser development, Optical pumping, Laser applications, Q switched lasers, Q switching, Birefringence

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Proceedings Article | 11 January 2000 Paper

Mercury and beyond: diode-pumped solid state lasers for inertial fusion energy

Camille Bibeau, Raymond Beach, Andy Bayramian, Jean-Christophe Chanteloup, Christopher Ebbers, Mark Emanuel, Charles Orth, Joshua Rothenberg, Kathleen Schaffers, Jay Skidmore, Steven Sutton, Luis Zapata, Stephen Payne, Howard Powell

Proceedings Volume 3886, (2000) https://doi.org/10.1117/12.375148

KEYWORDS: Crystals, Diodes, Mercury, Semiconductor lasers, Fusion energy, Head, Diode pumped solid state lasers, Laser systems engineering, Laser crystals, Optical amplifiers

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Proceedings Article | 27 May 1998 Paper

Design modeling of the 100-J diode-pumped solid state laser for Project Mercury

Charles Orth, Raymond Beach, Camille Bibeau, Eric Honea, Kenneth Jancaitis, Janice Lawson, Christopher Marshall, Richard Sacks, Kathleen Schaffers, Jay Skidmore, Steven Sutton

Proceedings Volume 3265, (1998) https://doi.org/10.1117/12.308664

KEYWORDS: Diodes, Crystals, Mercury, Semiconductor lasers, Adaptive optics, Optical amplifiers, Laser development, Absorption, Head, Laser systems engineering

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Proceedings Article | 8 December 1997 Paper

Description and performance of the preamplifier for the National Ignition Facility (NIF) laser system

John Crane, Mikael Martinez, Bryan Moran, Curt Laumann, James Davin, Raymond Beach, Bradley Golick, Russell Jones, John Braucht, Michael Perry, Kenneth Skulina, Frank Penko, Steve Herman, Scott Burkhart, Scott Mitchell

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294350

KEYWORDS: Optical amplifiers, National Ignition Facility, Laser systems engineering, Amplifiers, Photodiodes, Telescopes, Pulsed laser operation, Thin films, Polarizers, Space telescopes

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Proceedings Article | 1 November 1997 Paper

New class of diode-pumped mid-IR broadly tunable lasers based on TM2+ ions in Td coordination: Cr2+:ZnX (X=S,Se)

William Krupke, Ralph Page, Kathleen Schaffers, Stephen Payne, Raymond Beach, Jay Skidmore, Mark Emanuel

Proceedings Volume 3176, (1997) https://doi.org/10.1117/12.293479

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Proceedings Article | 2 May 1997 Paper

High-power laser diodes at various wavelengths

Mark Emanuel, Jay Skidmore, Raymond Beach

Proceedings Volume 3001, (1997) https://doi.org/10.1117/12.273775

KEYWORDS: Diodes, High power lasers, Reliability, Semiconductor lasers, Quantum wells, Doping, Tissue optics, Photodynamic therapy, Absorption

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Proceedings Article | 4 April 1997 Paper

High average power diode-pumped solid-state lasers

Camille Bibeau, Raymond Beach, Eric Honea, Christopher Marshall, Steven Sutton, Mark Emanuel, Jay Skidmore, Stephen Payne

Proceedings Volume 3092, (1997) https://doi.org/10.1117/12.270201

KEYWORDS: Diodes, Laser development, Diode pumped solid state lasers, Semiconductor lasers, Defense and security, Laser systems engineering, Laser spectroscopy, Crystals, Medical research, Silicon

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Proceedings Article | 27 May 1996 Paper

Optically tuning a dichroic multilayer stack for a high-fluence laser application

Robert Chow, Gary Loomis, Camille Bibeau, Nicole Molau, Vernon Kanz, Raymond Beach

Proceedings Volume 2714, (1996) https://doi.org/10.1117/12.240414

KEYWORDS: Coating, Multilayers, Transmittance, Laser induced damage, Laser damage threshold, Oxides, Reflectivity, Interfaces, Laser applications, Optical design

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Proceedings Article | 8 May 1996 Paper

Diode-pumped femtosecond solid state lasers based on semiconductor saturable absorbers

Daniel Kopf, Th. Straessle, Guang Zhang, Franz Kaertner, Ursula Keller, Michael Moser, D. Jubin, Kurt Weingarten, Raymond Beach, Mark Emanuel, Jay Skidmore

Proceedings Volume 2701, (1996) https://doi.org/10.1117/12.239711

KEYWORDS: Mode locking, Semiconductor lasers, Femtosecond phenomena, Semiconductors, Mirrors, Saturable absorption, Dispersion, Fabry–Perot interferometers, Absorption, Laser stabilization

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Proceedings Article | 25 March 1996 Paper

High-power 2-um diode-pumped Tm:YAG laser

Raymond Beach, Steven Sutton, Eric Honea, Jay Skidmore, Mark Emanuel

Proceedings Volume 2698, (1996) https://doi.org/10.1117/12.236152

KEYWORDS: Semiconductor lasers, Laser applications, Rod lasers, Diodes, Continuous wave operation, Absorption, Microlens, Optical pumping, Laser development, Thulium

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Proceedings Article | 8 December 1995 Paper

National Ignition Facility front-end laser system

Scott Burkhart, Raymond Beach, John Crane, James Davin, Michael Perry, Russell Wilcox

Proceedings Volume 2633, (1995) https://doi.org/10.1117/12.228290

KEYWORDS: Optical amplifiers, Fiber amplifiers, Oscillators, National Ignition Facility, Fusion energy, Glasses, Laser systems engineering, Amplifiers, Modulation, Semiconductor lasers

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Proceedings Article | 12 May 1995 Paper

Applications of microlens-conditioned laser diode arrays

Raymond Beach, Mark Emanuel, Barry Freitas, Jay Skidmore, Nils Carlson, William Benett, Richard Solarz

Proceedings Volume 2383, (1995) https://doi.org/10.1117/12.209030

KEYWORDS: Semiconductor lasers, Diodes, Silicon, Microlens, Microlens array, Glasses, Semiconducting wafers, Optical pumping, Laser applications, Photography

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The ability to condition the radiance of laser diodes using shaped-fiber cylindrical-microlens technology has dramatically increased the number of applications that can be practically engaged by diode laser arrays. Lawrence Livermore National Laboratory (LLNL) has actively pursued optical efficiency and engineering improvements in this technology in an effort to supply large radiance-conditioned laser diode array sources for its own internal programs. This effort has centered on the development of a modular integrated laser diode packaging technology with the goal of enabling the simple and flexible construction of high average power, high density, two-dimensional arrays with integrated cylindrical microlenses. Within LLNL, the principal applications of microlens-conditioned laser diode arrays are as high intensity pump sources for diode pumped solid state lasers (DPSSLs). A simple end-pumping architecture has been developed and demonstrated that allows the radiation from microlens- conditioned, two-dimensional diode array apertures to be efficiently delivered to the end of rod lasers. This architecture enables the generation of pump bemas that are scalable in absolute power with intensities approaching 100 kW/cm². To date, pump powers as high as 2.5 kW have been delivered to 3 mm diameter laser rods. Such high power levels are critical for pumping solid state lasers in which the terminal laser level is a Stark level lying in the ground state manifold. Previously, such systems have often required operation of the solid state gain medium at low temperature to freeze out the terminal laser Stark level population, so as to minimize losses resulting from reabsorption of the laser radiation. The necessity of low temperature operation has rendered such systems impractical for many applications. Our recently developed high intensity pump sources overcome this difficulty by effectively pumping to much higher inversion levels, allowing efficient operation at or near room temperature. Because the end-pumping technology is scalable in absolute power, the number of rare-earth ions and transitions that can be effectively accessed for use in practical DPSSL systems has grown tremendously. Unique laser systems for applications in fields such as medicine and remote sensing can now be simply realized. We have also been involved in programs to evaluate the use of direct diodes for material processing applications. Here, diode radiation from an extended two-dimensional microlens-conditioned array is focused and delivered directly onto a work piece. Systems based on this concept can be utilized in the heat treating and hardening of metals. Another application of microlens-conditioned laser diode arrays is in the direct coupling of their radiation to optical fibers. Direct diode-to-fiber coupling has recently been demonstrated for a medical application in which 22 W of cw 690 nm radiation was delivered from a microlens-conditioned stack of AlGaInP laser diode bars through a 1 mm core fused silica fiber. This approach used a simple and inexpensive 1 cm focal length lens to direct the microlens-conditioned radiation from the diode stack into the optical fiber.

Proceedings Article | 28 April 1995 Paper

New diode wavelengths for pumping solid state lasers

Jay Skidmore, Mark Emanuel, Raymond Beach, Barry Freitas, Nils Carlson, Christopher Marshall, William Benett, Richard Solarz, David Bour, David Treat

Proceedings Volume 2382, (1995) https://doi.org/10.1117/12.208438

KEYWORDS: Semiconductor lasers, Diodes, Heatsinks, Silicon, Continuous wave operation, Solid state lasers, Gallium arsenide, Indium gallium arsenide, Absorption, Quantum wells

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Proceedings Article | 16 August 1994 Paper

Advanced laser driver for soft x-ray projection lithography

Luis Zapata, Raymond Beach, C. Brent Dane, Patrick Reichert, John Honig, Lloyd Hackel

Proceedings Volume 2206, (1994) https://doi.org/10.1117/12.184615

KEYWORDS: Diodes, Optical amplifiers, Oscillators, X-rays, X-ray lithography, Projection lithography, Nd:YAG lasers, Semiconductor lasers, Silicon, Crystals

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Proceedings Article | 16 August 1994 Paper

Greater than 100 watt average power at 0.53 um with 25 ns, 2.5 kHz repetition rate pulses from a single-power oscillator

Stephan Velsko, Brian Comaskey, George Albrecht, Raymond Beach

Proceedings Volume 2206, (1994) https://doi.org/10.1117/12.184613

KEYWORDS: Q switching, Q switched lasers, Oscillators, Crystals, Diodes, Frequency conversion, Nd:YAG lasers, Semiconductor lasers, Electro optics, Pulsed laser operation

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Proceedings Article | 1 June 1994 Paper

Improved performance of high-average-power semiconductor arrays for applications in diode-pumped solid state lasers

Raymond Beach, Mark Emanuel, William Benett, Barry Freitas, Dino Ciarlo, Nils Carlson, Steven Sutton, Jay Skidmore, Richard Solarz

Proceedings Volume 2148, (1994) https://doi.org/10.1117/12.176608

KEYWORDS: Diodes, Semiconductor lasers, Silicon, Microlens, Glasses, Photography, Semiconducting wafers, Diode pumped solid state lasers, Laser development

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Proceedings Article | 1 May 1994 Paper

Scaling of solid state lasers for satellite power beaming applications

Herbert Friedman, George Albrecht, Raymond Beach

Proceedings Volume 2121, (1994) https://doi.org/10.1117/12.174197

KEYWORDS: Diodes, Crystals, Solid state lasers, Semiconductor lasers, Satellites, Alexandrite, YAG lasers, Laser development, Alexandrite lasers, Diode pumped solid state lasers

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Proceedings Article | 12 November 1993 Paper

Microchannel-cooled heatsinks for high-average-power laser diode arrays

William Benett, Barry Freitas, Dino Ciarlo, Raymond Beach, Steven Sutton, Mark Emanuel, Richard Solarz

Proceedings Volume 1997, (1993) https://doi.org/10.1117/12.163832

KEYWORDS: Semiconductor lasers, Silicon, Diodes, Heatsinks, Glasses, Thermal engineering, Heat flux, Microlens, Photography, Liquids

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Proceedings Article | 16 June 1993 Paper

One-kilowatt average-power diode-pumped Nd:YAG folded zigzag slab laser

Brian Comaskey, George Albrecht, Raymond Beach, Stephan Velsko, Steven Sutton, Scott Mitchell, Charles Petty, Kenneth Jancaitis, William Benett, Barry Freitas, Richard Solarz

Proceedings Volume 1865, (1993) https://doi.org/10.1117/12.146945

KEYWORDS: Diodes, Semiconductor lasers, Nd:YAG lasers, Crystals, Optical pumping, Laser development, Thermography, Laser applications, Laser drilling, Lasers

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Proceedings Article | 16 June 1993 Paper

Microchannel-cooled heatsinks for high-average-power laser diode arrays

William Benett, Barry Freitas, Dino Ciarlo, Raymond Beach, Steven Sutton, Mark Emanuel, Richard Solarz

Proceedings Volume 1865, (1993) https://doi.org/10.1117/12.146943

KEYWORDS: Semiconductor lasers, Silicon, Diodes, Heatsinks, Glasses, Microlens, Photography, Liquids, Laser crystals

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Proceedings Article | 11 May 1993 Paper

High-power diode-pumped solid state lasers

Richard Solarz, George Albrecht, Raymond Beach, Brian Comaskey

Proceedings Volume 1979, (1993) https://doi.org/10.1117/12.144107

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Proceedings Article | 26 June 1992 Paper

Microchannel heatsinks for high average power laser diode arrays

William Benett, Barry Freitas, Raymond Beach, Dino Ciarlo, Verry Sperry, Brian Comaskey, Mark Emanuel, Richard Solarz, David Mundinger

Proceedings Volume 1634, (1992) https://doi.org/10.1117/12.59177

KEYWORDS: Semiconductor lasers, Heatsinks, Diodes, Silicon, Laser crystals, Continuous wave operation, Technologies and applications, Semiconducting wafers, Crystals, Resistance

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Proceedings Article | 1 June 1992 Paper

Diode-pumped 275-watt average power Nd:YAG slab laser

Brian Comaskey, Raymond Beach, George Albrecht, William Benett, Barry Freitas, Charles Petty, David Van Lue, David Mundinger, Richard Solarz

Proceedings Volume 1627, (1992) https://doi.org/10.1117/12.60153

KEYWORDS: Semiconductor lasers, Nd:YAG lasers, Diodes, Laser development, Optical pumping

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Proceedings Article | 1 April 1990 Paper

Ground-state depleted laser in neodymium-doped yttrium orthosilicate

Raymond Beach, George Albrecht, Richard Solarz, William Krupke, Brian Comaskey, Scott Mitchell, Charles Brandle, George Berkstresser

Proceedings Volume 1223, (1990) https://doi.org/10.1117/12.18408

KEYWORDS: Crystals, Absorption, Neodymium, Solid state lasers, Samarium, Q switched lasers, Polarization, Luminescence, Alexandrite lasers, Spectroscopy

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A ground state depleted (GSD)^1,2 laser has been demonstrated in the form of a Q-switched oscillator operating at 912 nm. Using Nd³⁺ as the active ion and Y2SiO5 as the host material, the laser transition is from the lowest lying stark level of the Nd³⁺⁴F_3/2 level to a stark level 355 cm^-1 above the lowest lying one in the ⁴I_9/2 manifold. The necessity of depleting the ground ⁴I_9/2 manifold is evident for this level scheme as transparency requires a 10% inversion. To achieve the high excitation levels required for the efficient operation of this laser, bleach wave pumping using an alexandrite laser at 745 nm has been employed. The existence of a large absorption feature at 810 nm also allows for the possibility of A1GaAs laser diode pumping. Using KNbO₃, noncritical phase matching is possible at 140°C using d₃₂ and has been demonstrated. The results of Q-switched laser performance and harmonic generation in KNbO₃ will be presented. Orthosilicate is a monoclinic biaxial crystal. An oriented spectroscopic evaluation consisting of a Judd-Ofelt analysis of oriented absorption spectra and the measurements of oriented emission spectra has been completed and will be presented. Results of modeling using these spectroscopically determined parameters will be compared with the actual laser performance. The performance of this laser at 911 nm which allows accessing Cs atomic resonance filters through harmonic doubling will also be discussed. Orthosilicate can be grown in large boules of excellent optical quality using a Czochralski technique. Because of the relatively small 912 nm emission cross section of 2-3 x 10^-20cm² (orientation dependent) fluences of 10-20 J/cm² must be circulated in the laser cavity for the efficient extraction of stored energy. This necessitates very aggressive laser damage thresholds. Results from the Reptile laser damage facility at Lawrence Livermore National Laboratory (LLNL) will be presented showing Y₂SiO₅ bulk and AR sol-gel coated surface damage thresholds of greater than 40 J/cm² for 10 nsec, 10 Hz, 1.06 μ pulses.

Showing 5 of 41 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 16 June 1993

Diode Pumping of Average-Power Solid State Lasers

Conference Committee Involvement (1)

Diode Pumping of Average-Power Solid State Lasers

21 January 1993 | Los Angeles, CA, United States

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