Optical distortion of heated mirrors in CO&amp;lt;inf&amp;gt;2&amp;lt;/inf&amp;gt;-laser systems

Аполлонов, В. В.; Barchukov, A. I.; Prokhorov, A.

doi:10.1109/jqe.1974.1068187

Cited by 24 publications

(9 citation statements)

References 3 publications

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“…In this section we have given the general solution of the transient thermoelastic problem as a Dini series and expanded the aberration on the Zernike polynomials. In the following we will specify the shape and evolution of the surface deformations and then of the aberrations in the cases of heating first by dissipation in the coating (we will find again the results of section 3 for large values of time), and then by absorption in the bulk.…”

Section: Expression As a Dini Seriesmentioning

confidence: 99%

“…The three-dimensional thermoelastic problem has in general no analytical solution. Nevertheless, some authors have studied the deformations of mirrors heated by lasers [2][3][4][5][6][7][8] ; but they almost always consider the static regime with sometimes fuzzy boundary conditions. Therefore we find it useful to publish our attempt to treat the boundary conditions and the time dependence precisely.…”

Section: Introductionmentioning

confidence: 99%

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Analytical models of transient thermoelastic deformations of mirrors heated by high power cw laser beams

Hello

Vinet

1990

J. Phys. France

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Section: Expression As a Dini Seriesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical models of transient thermoelastic deformations of mirrors heated by high power cw laser beams

Hello

Vinet

1990

J. Phys. France

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“…As a result, the temperature gradient is distributed parallel to the laser beam, which does not result in the thermal lens effect. In practice, a thin laser element in high-power disk lasers is either connected to a porous heat sink or is cooled by forced convection [2,3].…”

Section: Design and Physical Foundations Of Disk Laser Operationmentioning

confidence: 99%

High power disk lasers: advantages and prospects

Аполлонов¹

2012

AJMP

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Abstract:The mono-module disk laser concept is an effective design for diode-pumped solid-state lasers, which allows the realization of lasers with super-high output power, having very good efficiency and also excellent beam quality. Since the first demonstration of the principle in 1966 [1] the output power of mono-module disk has been increased to the level of few kW in continuous wave (CW) mode of operation. "Zig-Zag" disk laser geometry does not look like as a perspective one for further output parameters growing. The scaling laws for mono-module disk laser design show that the limits for CW mode of operation is far beyond 100 kW for output power and the energy can be higher than 100 J in pulsed mode of operation. Due to the efficient porous cooling technology and possibility of amplified spontaneous emission (ASE) suppression the operation of the mono-module disk laser geometry is possible in CW and pulse-periodical (P-P) modes at extremely high output power.

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“…(irr22C1S (8) For the film, taking into account equation (6) we have: (1+vf = Ef ) a +(i + vf) af Tf (9) Using the shear lag model, the interface shear stress and the normal stress in the film are linked through:…”

Section: Thin Film Bonded To a Substratementioning

confidence: 99%

Thermal stresses field induced by continuous-wave laser irradiation of optical components

Duloisy

Dijon

1994

Optical Interference Coatings

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As a consequence of optical absorption, the temperature of an optical component submitted to high power laser flux increases. The temperature field is known to be non uniform, this leads to a distribution of stresses which may damage the system for temperatures well below the melting point.Assuming linear, isotropic and homogeneous materials, thermal strains and stresses have been calculated in a semi infinite medium under an axisymmetric steady state distribution of temperature.Taking into account interfacial stresses, analytical expressions for the stress fields have been developed for a film bonded to a substrate and submitted to a long time laser irradiation. Last, the results are discussed and compared to observed degradation steps.

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Optical distortion of heated mirrors in CO<inf>2</inf>-laser systems

Cited by 24 publications

References 3 publications

Analytical models of transient thermoelastic deformations of mirrors heated by high power cw laser beams

Analytical models of transient thermoelastic deformations of mirrors heated by high power cw laser beams

High power disk lasers: advantages and prospects

Thermal stresses field induced by continuous-wave laser irradiation of optical components

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