Intracavity control of a 200-W continuous-wave Nd:YAG laser by a micromachined deformable mirror

Vdovin, Gleb; Kiyko, V. V.

doi:10.1364/ol.26.000798

Cited by 38 publications

(15 citation statements)

References 8 publications

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“…The maximum specified surface deflection range was 4µm at 290V, however, in these experiments the maximum actuator voltage activated was intentionally limited to 200V. Similar mirrors have been demonstrated at optical power densities of 2.6kW/cm 2 (intracavity) and 11kW/cm 2 (extracavity) without damage [9].…”

Section: Micro-machined Deformable Mirrorsupporting

confidence: 57%

Active transverse mode control and optimisation of an all-solid-state laser using an intracavity adaptive-optic mirror

Lubeigt¹,

Valentine²,

Girkin³

et al. 2002

Opt. Express

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Section: Micro-machined Deformable Mirrorsupporting

confidence: 57%

Active transverse mode control and optimisation of an all-solid-state laser using an intracavity adaptive-optic mirror

Lubeigt¹,

Valentine²,

Girkin³

et al. 2002

Opt. Express

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“…Low absorption ensures suppression of thermal heating, which can cause uncontrolled deformation of the mirror. Such an intracavity mirror was shown to be effective at 550 W in continuous stable regime 16 . Maximum deformation of the mirror is ~4 μm at the threshold voltage of 280 V. As it was shown above, this deformation should be sufficient for the task in hand.…”

Section: Results Of the Experimental Aprobationmentioning

confidence: 99%

Direct synthesis of the laser beam with pre-determined intensity distribution by means of intracavity beam shaping

et al. 2014

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We consider a problem of direct synthesis of the laser beam with predetermined intensity distribution, by means of intracavity adaptive optics. The mathematical formulation of the problem is reduced to the study of the solutions of the resonator equation, expressed in terms of the field amplitudes and phases inside the resonator, and the parameters of resonators that includes the deformable mirror. It is shown that, with some assumptions, the shape of the deformable mirror can be expressed as a function of the output intensity distribution. The results of direct numerical simulations agree with the obtained analytical estimates. Experimental verification is in progress.

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“…Nevertheless, occasional examples of intracavity laser application have been given. 10 In contrast, piezoelectrically activated DMs are widespread in the field of laser beam shaping. [11][12][13] From their inception, unimorph (and bimorph) DMs have been applied to the compensation for thermal lensing, 14,15 and this is still the case.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical design, hybrid fabrication, and testing of a MOEMS deformable mirror

Reinlein

Appelfelder

Gebhardt

et al. 2013

J. Micro/Nanolith. MEMS MOEMS

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Abstract. This paper reports on the thermomechanical modeling and characterization of a micro-opto-electro-mechanical systems deformable mirror (DM). This unimorph DM offers a low-temperature cofired ceramic substrate with screen-printed piezoceramic actuators on its rear surface and a machined copper layer on its front surface. We present the DM setup, thermomechanical modeling, and hybrid fabrication. The setup of the DM is transferred into a thermomechanical model in ANSYS Multiphysics. The thermomechanical modeling of the DM evaluates and optimizes the mount material and the copper-layer thickness for the loading cases: homogeneous thermal loading and laser-loading of the mirror. Subsequently, the developed and theoretically optimized DM setup is experimentally validated. The homogeneous loading of the optimized design results in a membrane deformation with a rate of −0.2 μm K −1 , whereas the laser loading causes an opposed change with a rate of −0.2 μm W −1 . Therefore, the proposed mirror design is suitable to precompensate laser-generated mirror deformations by homogeneous thermal loading (heating). We experimentally show that a 35-K preheating of the mirror assembly compensates for an absorbed laser power of 1.25 W. Therefore, the novel compensation regime "compound loading" for the suppression of laser-induced deformations is developed and proven.

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Intracavity control of a 200-W continuous-wave Nd:YAG laser by a micromachined deformable mirror

Cited by 38 publications

References 8 publications

Active transverse mode control and optimisation of an all-solid-state laser using an intracavity adaptive-optic mirror

Active transverse mode control and optimisation of an all-solid-state laser using an intracavity adaptive-optic mirror

Direct synthesis of the laser beam with pre-determined intensity distribution by means of intracavity beam shaping

Thermomechanical design, hybrid fabrication, and testing of a MOEMS deformable mirror

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