Multimode Diode Pumped Gas Alkali Vapor Laser
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Multimode Diode Pumped Gas Alkali Vapor Laser
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Author :
language : en
Publisher:
Release Date : 2005
Multimode Diode Pumped Gas Alkali Vapor Laser written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We report the first demonstration of a multimode-diode-pumped gas laser--Rb vapor operating on the 795 nm resonance transition. Peak output of (almost equal to)1 Watt was obtained using a volume-Bragg-grating stabilized pump diode array. The laser's output radiance exceeded the pump radiance by a factor greater than 2000. Power scaling (by pumping with larger diode arrays) is therefore possible.
Diode Pumped Alkali Vapor Lasers A New Pathway To High Beam Quality At High Average Power
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Author :
language : en
Publisher:
Release Date : 2005
Diode Pumped Alkali Vapor Lasers A New Pathway To High Beam Quality At High Average Power written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Resonance-transition alkali-vapor lasers have only recently been demonstrated [1] but are already attracting considerable attention. Alkali-atom-vapor gain media are among the simplest possible systems known, so there is much laboratory data upon which to base performance predictions. Therefore, accurate modeling is possible, as shown by the zero- free-parameter fits [2] to experimental data on alkali-vapor lasers pumped with Ti:sapphire lasers. The practical advantages of two of the alkali systems--Rb and Cs--are enormous, since they are amenable to diode-pumping [3,4]. Even without circulating the gas mixture, these lasers can have adequate cooling built-in owing to the presence of He in their vapor cells. The high predicted (up to 70%) optical-to-optical efficiency of the alkali laser, the superb (potentially 70% or better) wall-plug efficiency of the diode pumps, and the ability to exhaust heat at high temperature (100 C) combine to give a power-scalable architecture that is lightweight. A recent design exercise [5] at LLNL estimated that the system ''weight-to-power ratio'' figure of merit could be on the order of 7 kg/kW, an unprecedented value for a laser of the 100 kW class. Beam quality is expected to be excellent, owing to the small dn/dT value of the gain medium. There is obviously a long way to go, to get from a small laser pumped with a Ti:sapphire or injection-seeded diode system (of near-perfect beam quality, and narrow linewidth) [1, 4] to a large system pumped with broadband, multimode diode- laser arrays. We have a vision for this technology-development program, and have already built diode-array-pumped Rb lasers at the 1 Watt level. A setup for demonstrating Diode-array-Pumped Alkali vapor Lasers (DPALs) is shown in Figure 1. In general, use of a highly-multimode, broadband pump source renders diode-array-based experiments much more difficult than the previous ones done with Ti:sapphire pumping. High-NA optics, short focal distances, and short vapor cells are needed.
Diode Pumped Alkali Vapor Fiber Laser
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Author :
language : en
Publisher:
Release Date : 2006
Diode Pumped Alkali Vapor Fiber Laser written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
A method and apparatus is provided for producing near-diffraction-limited laser light, or amplifying near-diffraction-limited light, in diode pumped alkali vapor photonic-band-gap fiber lasers or amplifiers. Laser light is both substantially generated and propagated in an alkali gas instead of a solid, allowing the nonlinear and damage limitations of conventional solid core fibers to be circumvented. Alkali vapor is introduced into the center hole of a photonic-band-gap fiber, which can then be pumped with light from a pump laser and operated as an oscillator with a seed beam, or can be configured as an amplifier.
Diode Pumped Solid State Dpss Lasers
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Author : Mark W. Dowley
language : en
Publisher:
Release Date : 1998
Diode Pumped Solid State Dpss Lasers written by Mark W. Dowley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Technology & Engineering categories.
Broadband Pumping Effects On The Diode Pumped Alkali Laser
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Author : Paul Nathaniel Jones
language : en
Publisher:
Release Date : 2012-10-26
Broadband Pumping Effects On The Diode Pumped Alkali Laser written by Paul Nathaniel Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-10-26 with Gas lasers categories.
This research seeks to gain greater insight on the mechanics of The Diode Pumped Alkali Laser through analytic modeling techniques. This work is an extension to a previous model developed by Dr. Gordon Hager, and focuses on the addition of pump-beam bandwidth. Specifically, it seeks to determine the effect that broadband pumping has on laser performance. The model incorporates all the fundamental parameters within the laser system, including alkali concentrations, collision partner concentrations, pump bandwidth, length and temperature of gain medium, transmission, and reflectivity. Baseline operating conditions set Rubidium (Rb) concentrations ranging from 10 - 10 atoms/cm, corresponding to operating temperatures ranging from 50 - 150 C. Ethane or Methane concentrations are varied corresponding to partial pressures from 100 - 500 Torr. The system is evaluated for incident beam intensity ranging from 0 - 30000 W/cm, for both lasing and non-lasing system analysis. Output laser beam intensities scale well with input beam intensity and the model predicts optical to optical efficiencies of over 70%.
High Power Laser Handbook
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Author : Hagop Injeyan
language : en
Publisher: McGraw Hill Professional
Release Date : 2011-01-05
High Power Laser Handbook written by Hagop Injeyan and has been published by McGraw Hill Professional this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01-05 with Technology & Engineering categories.
The State of the Art in High-Power Laser Technology Filled with full-color images, High-Power Laser Handbook offers comprehensive details on the latest advances in high-power laser development and applications. Performance parameters for each major class of lasers are described. The book covers high-power gas, chemical, and free-electron lasers and then discusses semiconductor diode lasers, along with the associated technologies of packaging, reliability, and beam shaping and delivery. Current research and development in solid-state lasers is described as well as scaling approaches for high CW powers, high pulse energies, and high peak powers. This authoritative work also addresses the emergence of fiber lasers and concludes by reviewing various methods for beam combining. Coverage Includes: Carbon dioxide lasers Excimer lasers Chemical lasers High-power free-electron lasers Semiconductor laser diodes High-power diode laser arrays Introduction to high-power solid-state lasers Zig-zag slab lasers ThinZag high-power laser development Thin disk lasers Heat capacity lasers Ultrafast solid-state lasers Ultrafast lasers in the thin disk geometry The National Ignition Facility laser Optical fiber lasers Pulsed fiber lasers High-power ultrafast fiber laser systems High-power fiber lasers for industry and defense Beam combining
Developments Toward A Reliable Diode Pumped Hydrocarbon Free 795 Nm Rubidium Laser
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Author :
language : en
Publisher:
Release Date : 2008
Developments Toward A Reliable Diode Pumped Hydrocarbon Free 795 Nm Rubidium Laser written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
We report a 795-nm diode-pumpable Rb laser using a buffer gas of pure 3He. 3He gas enhances mixing of the Rb fine-structure levels. This enables efficient lasing at reduced He pressures and improved thermal management.
Exploration Of The Potential Performance Of Diode Laser Pumped Gas Cell Atomic Frequency Standards
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Author : James C. Camparo
language : en
Publisher:
Release Date : 1986
Exploration Of The Potential Performance Of Diode Laser Pumped Gas Cell Atomic Frequency Standards written by James C. Camparo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Recently, there has been considerable interest in the use of single-mode diode lasers in atomic frequency standards. In this report, theoretical calculations were performed to quantify the expected performance improvement upon incorporation of diode lasers in rubidium gas cell atomic frequency standards. We assume that clock signal shot noise, the diode laser's quantum noise, and diode laser frequency locking noise all contribute to the atomic frequency standard's stability. Keywords include: Atomic Clocks, Diode Lasers, and Optical Pumping.
Pump Diode Characterization For An Unstable Diode Pumped Alkali Laser Resonator
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Author : Chad T. Taguba (MSGT, USAF)
language : en
Publisher:
Release Date : 2013
Pump Diode Characterization For An Unstable Diode Pumped Alkali Laser Resonator written by Chad T. Taguba (MSGT, USAF) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Bragg gratings categories.
Investigations Of Laser Pumped Gas Cell Atomic Frequency Standard
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Author :
language : en
Publisher:
Release Date : 1981
Investigations Of Laser Pumped Gas Cell Atomic Frequency Standard written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.
Recently it has been suggested that the performance characteristics of a rubidium gas cell atomic frequency standard might be improved by replacing the standard rubidium discharge lamp with a single mode laser diode. Since the short term stability of the rubidium frequency standard is limited by the shot noise of the photodetector, an increased signal to noise ratio, from the more efficient laser diode pumping, might significantly improve the short term performance. Because the emission wavelength of the laser diode can be tuned, improved long term performance could be attained through the control of the light shift effect. However, work done by Lewis et al at NBS Boulder indicates that a new source of instability is present in the laser pumped clock; the frequency instability of the laser induces instability in the frequency standard. We have been investigating various aspects of the laser pumped gas cell atomic clock. Our investigations include effects due to laser intensity, laser detuning and the choice of the particular atomic absorption line. Our studies indicate that the performance of the gas cell clock may be improved by judicious choice of the operating parameters of the laser diode.