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Friendsville, PA, United States

Brown D.C.,Snake Creek Lasers, LLC
IEEE Journal of Quantum Electronics | Year: 2012

In this paper, the second of a two-part manuscript, we extend the comprehensive kinetics model of Part I to treat four-level solid-state amplifiers and resonators, followed by the presentation of a detailed systems model that preserves power conservation throughout. We believe that this laser systems model is the first to allow an end to end description of the power flow in a solid-state laser while maintaining power conservation, can easily be extended to include quasi-three-level and other laser kinetics schemes, and will provide a very useful tool to physicists and engineers engaged in the design and optimization of solid-state laser systems. © 2012 IEEE. Source


Brown D.C.,Snake Creek Lasers, LLC
IEEE Journal of Quantum Electronics | Year: 2012

This paper is the first of a two-part manuscript whose overall objective is to present a unified mathematical kinetics model of four-level laser systems solidly anchored to known physics, optics, and materials considerations, but ultimately viewed from an engineering systems perspective, and with power conservation obeyed throughout. This paper provides the basis for Part II, which couples this kinetics model with a treatment of solid-state laser amplifiers and oscillators, leading to the presentation of a new laser engineering systems model. © 1965-2012 IEEE. Source


Assad M.E.H.,Aalto University | Brown D.C.,Advanced Laser Systems | Brown D.C.,Snake Creek Lasers, LLC
IEEE Journal of Quantum Electronics | Year: 2013

In this paper, the temperature distribution is derived analytically within a fiber laser end pumped by a top-hat beam subjected to an external convection at the cladding surface. The temperature distribution is obtained through considering the radial heat conduction and neglecting the axial heat conduction due to large aspect ratio. An expression for the volumetric entropy generation rate within the fiber laser is also derived, which is directly proportional to the temperature gradients and inversely proportional to the temperature. Based on the temperature distribution, the maximum pump power is obtained just before the thermal damage. The temperature distribution is compared with 2-D temperature distribution and the results are in good agreement. The effect of laser absorption coefficient and Biot number on the temperature and volumetric entropy generation rate are presented graphically. The results show that volumetric entropy generation rate decreases as the Biot number decreases because of lower temperature gradients at the cladding surface. The volumetric rate is always maximum at the fiber core and cladding interface. The results are presented in dimensionless form, so that they can be applied to any end-pumped laser rod, crystalline or glassy. © 2012 IEEE. Source


Grant
Agency: Department of Defense | Branch: Office for Chemical and Biological Defense | Program: SBIR | Phase: Phase I | Award Amount: 100.00K | Year: 2011

This topic addresses the need for compact efficient solid-state deep ultraviolet (UV) lasers operating in the wavelength range of 220-250 nm, for use in Raman systems for chemical and biological detection. The laser to be developed would also be very useful in the detection of explosives. We propose to develop an efficient 946 Q-switched nm laser system that is efficiently quadrupled to 236.5 nm. The laser system will produce excellent beam-quality and high pulse energy. It will operate single longitudinal and transverse mode. During Phase I we will generate a detailed design for the compact deep UV laser, complete experimental testing of candidate nonlinear crystals to be used for deep UV generation using existing high power lasers, generate detailed engineering device drawings for a Phase II demonstration, and develop a technology roadmap leading to a compact, efficient deep UV laser system with a volume of<1800 in3 and a weight<25 pounds. In the Phase I option we propose to demonstrate an integrated long-pulse Q-switched Nd:YAG laser that operates in both single longitudinal and transverse modes.


Grant
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2011

This Proposal addresses the need for high average power (HAP), near-diffraction-limited laser sources for laser stripping applications, an important process for going forward with plans to build an 8 GeV H- to proton injector source for driving upgraded Fermi National Accelerator Laboratory proton accelerators. The overall objective of the proposed program is to apply high average power ultrafast cryogenic laser technology developed by Snake Creek Lasers to demonstrate efficient high average power laser sources with excellent beam-quality for laser stripping applications. Commercial Applications and Other Benefits: Laser technology developed under this proposed program will have applications in national laboratories for laser stripping and photocathode illumination, and in the commercial sector for laser texturing, selective ablation, wrap-through, and other micromachining applications to the photovoltaic and semiconductor industries. The high efficiency and average power available from cryogenic lasers will significantly increase process throughput and reduce carbon emissions

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