Patent
Hybrid laser power combining and beam cleanup system using nonlinear and adaptive optical wavefront compensation
Marvin B. Klein,David M. Pepper,R. R. Stephens,T. R. O’Meara,David F. Welch,Robert J. Lang,Jack Feinberg,Stuart MacCormack +7 more
TLDR
In this paper, the outputs of several amplification modules are combined into a single output beam using adaptive optics, with the outputs from different modules phase matched to each other by diverting two minor portions of the combined beam, partially overlapping the diverted beams and adjusting the amplification module phases to cancel phase differentials between the overlapped portions.Abstract:
An optical amplification system directs a diffraction-limited signal beam through a series of approximately 90° crossings with a number of non-diffraction-limited pump beams in a photorefractive medium All of the beams are s-polarized, resulting in an energy transfer from the pumps to the signal beam while leaving the signal beam diffraction-limited The photorefractive medium is preferably a series of BaTiO 3 :Rh crystals that receive the pump and signal beams through orthogonal faces, with their C-axes at approximately 45° to both beams A binary tree optical distribution network is used to minimize waveguide splits in forming a large number of pump beams The outputs of several amplification modules are combined into a single output beam using adaptive optics, with the outputs from the different modules phase matched to each other by diverting two minor portions of the combined beam, partially overlapping the diverted beams and adjusting the amplification module phases to cancel phase differentials between the overlapped portions Similarly, sets of combined and phase-matched beams can be combined with each other (again using adaptive optics) to generate still higher powers using a super module approachread more
Citations
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Patent
Laser based frequency standards and their applications
Ingmar Hartl,Martin E. Fermann +1 more
TL;DR: Frequency standards based on mode-locked fiber lasers, fiber amplifiers and fiber-based ultra-broad bandwidth light sources, and applications of the same can be found in this article,.
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TL;DR: In this paper, the optical phase between the individual fiber amplifier elements of the fiber array is measured and controlled using a variety of phase detection and compensation techniques, which can be used for EUV and X-ray generation as well as pumping of parametric amplifiers.
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Self-synchronous locking of optical coherence by single-detector electronic-frequency tagging
TL;DR: In this paper, a coherent laser beam combining system was proposed, where the output of a single master oscillator is split into a plurality of signals, the signals are electronically modulated at unique frequencies.
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End pumped zig-zag slab laser gain medium
Hagop Injeyan,Carolyn S. Hoefer +1 more
TL;DR: In this paper, an optical amplifier with an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG), is presented.
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System and method for effecting high-power beam control with adaptive optics in low power beam path
Robert W. Byren,Alvin F. Trafton +1 more
TL;DR: In this paper, a beam control system and method which utilizes the wavefront reversal property of nonlinear optical phase conjugation to permit incorporation of a liquid crystal OPA within the low power legs of the beam controller system, thereby affording the advantages of the OPA without the power limitations thereof.
References
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Journal ArticleDOI
Spectroscopic and photorefractive properties of infrared-sensitive rhodium-doped barium titanate
TL;DR: In this article, the authors have grown and characterized BaTiO3 doped with Rh and showed that the resulting blue-green color is probably due to charge-transfer optical transitions involving Rh4+ and/or Rh3+ centers.
Journal ArticleDOI
Beam cleanup using photorefractive two-wave mixing
Arthur E. Chiou,Pochi Yeh +1 more
TL;DR: In this paper, the cleanup of spatial and temporal phase aberration using photorefractive two-wave mixing in a strontium barium niobate crystal was reported.
Patent
Energy scalable laser amplifier
Richard L. Abrams,Hans W. Bruesselbach,Concetto R. Guiliano,Richard C. Lind,Monica L. Minden,T. R. O’Meara,David A. Rockwell,Ronald R. Stephens +7 more
TL;DR: In this paper, a laser apparatus (10) has a coherent master oscillator radiation source (30) for driving a plurality of laser gain elements (20) positioned in a operationally parallel configuration so as receive unamplified radiation (40) from master oscilltor (30), and transmitting amplified radiation (44).
Patent
External beam combining of multiple lasers
TL;DR: In this article, a coupled laser system is defined by a unidirectional ring resonator, with a partially reflecting mirror, a first substantially 100% reflecting mirror and a second substantially 100 percent reflecting mirror.
Patent
Device for coherent addition of laser beams
TL;DR: In this paper, the authors proposed a coherent addition of laser beams including several optical amplifiers in parallel pumped by a beam coming from a master laser, where the beams emitted by these amplifiers are transmitted to a nonlinear material and play the role of pump beams.