High-power fiber lasers

Muendel, Martin H.; Engstrom, B.; Abbey, S.; Sanders, Steve; Fidric, Bernard G.; Mitchard, G.

doi:10.1109/cleo.1999.834306

Cited by 2 publications

(4 citation statements)

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“…Inner caustics can be avoided by rectilinearly shaping the pump cladding [40], which has the ancillary advantage of matching the shape of diode-array output. The overall absorption coefficient of the fiber is reduced by the ratio of the core area to the area of the pump cladding [36].…”

Section: Fiber Designs For Cladding Pumpingmentioning

confidence: 99%

Advances in Mid-Infrared Fiber Lasers

Pollnau

Jackson

2008

NATO Science for Peace and Security Series B: Physics and Biophysics

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The current state of the art in mid-infrared fiber laser research is reviewed. The relevant glass and ceramic fiber host matkrials and the fiber, pump, and resonator geometries are introduced. Lasers operating on transitions ranging from 1.9 to 4 pm occurring in the r a r e e a r t h ions ~r n ~+ , H O ~+ , E?+, and D ~~+ and their population mechanisms are discussed on the basis of the fundamental spectroscopic properties of these ions. Continuous-wave fundamental-mode power levels ranging from a few mW near 4 pm up to 85 W near 2 pm have been demonstrated in recent years. Power-scaling methods and their limitations, the possibilities to optimize the population mechanisms and increase the efficiencies of these lasers, novel concepts, as well as the prospects of future mid-infrared fiber lasers at transitions in the wavelength range beyond 3 pm and extending to 5 pm are described.

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Section: Fiber Designs For Cladding Pumpingmentioning

confidence: 99%

Advances in Mid-Infrared Fiber Lasers

Pollnau

Jackson

2008

NATO Science for Peace and Security Series B: Physics and Biophysics

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“…Besides, the assumptions made for both methods are equivalent. Remember that by using ray optics method, 1) we have assumed the Brightness Theorem, 2) i.e. rays in a multimode fiber core reflected infinitely in all directions, fills the whole cross section uniformly with no overlap or voids, then all optical power uniformly distributed at every point of the core.…”

Section: Pump Absorption Efficiency Of Symmetric Offset and Circular Dcfmentioning

confidence: 99%

“…Efforts have been made to obtain higher power laser emission by the use of double-clad fibers (DCF). [1][2][3][4] Such a configuration makes it possible launching high power, lager size and NA pumping light into matched inner cladding. The pumping light is then gradually absorbed by the RE-doped core during propagating in the multimode inner cladding.…”

Section: Introductionmentioning

confidence: 99%

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Analytic Calculation of Absorption Efficiency for Double-Clad Fibers Using Modal Method

Wang¹,

Xu²

2005

Jpn. J. Appl. Phys.

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We construct explicit BPS and non-BPS solutions of the U(2k) Yang-Mills equations on the noncommutative space R 2n θ ×S 2 with finite energy and topological charge. By twisting with a Dirac multi-monopole bundle over S 2 , we reduce the Donaldson-Uhlenbeck-Yau equations on R 2n θ ×S 2 to vortex-type equations for a pair of U(k) gauge fields and a bi-fundamental scalar field on R 2n θ . In the SO(3)-invariant case the vortices on R 2n θ determine multi-instantons on R 2n θ ×S 2 . We show that these solutions give natural physical realizations of Bott periodicity and vector bundle modification in topological K-homology, and can be interpreted as a blowing-up of D0-branes on R 2n θ into spherical D2-branes on R 2n θ ×S 2 . In the generic case with broken rotational symmetry, we argue that the D0-brane charges on R 2n θ ×S 2 provide a physical interpretation of the Adams operations in K-theory.

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High-power fiber lasers

Cited by 2 publications

References 1 publication

Advances in Mid-Infrared Fiber Lasers

Advances in Mid-Infrared Fiber Lasers

Analytic Calculation of Absorption Efficiency for Double-Clad Fibers Using Modal Method

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