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1
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Dispersive Controlling of Femtosecond Laser Radiation: New Opportunities and Developments

100%
Molchanov V., Yushkov K.
Acta Physica Polonica A
|
2015
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vol. 127
|
issue 1
20-24
EN
The paper is devoted to new trends in dispersive control techniques for ultrafast light emission. Acoustooptical dispersive delay lines for controlling the spectral components and phase composition of ultrashort laser pulses are considered. The method of super high frequency modulation of chirped femtosecond laser pulses is proposed. Theoretical approach to dispersive pulse shaping is supported by the experiments.
2
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Characterization of Temperature Field Distribution in Large-Size Paratellurite Crystals Applied in Acousto-Optic Devices

61%
Tretiakov S., Grechishkin R., Kolesnikov A., Kaplunov I., Yushkov K., Molchanov V., Linde B.
Acta Physica Polonica A
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2015
|
vol. 127
|
issue 1
72-74
EN
Temporal and spatial distribution of temperature field was studied in operating acousto-optic devices on base of large-size paratellurite crystals. The study was carried out in real time by means of thermal imaging technique. Dynamics of heat release in a hot deflector and a hot tunable filter was examined at different frequencies and driving electric power levels applied to piezoelectric transducers. The study was also based on measurements of standing wave ratio and analysis of the Smith charts.
3
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A Study of Optical Uniformity of Lithium Niobate and Paratellurite Crystals by the Method of Conoscopy

61%
Kolesnikov A., Tretiakov S., Grechishkin R., Morozova K., Yushkov K., Molchanov V., Linde B.
Acta Physica Polonica A
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2015
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vol. 127
|
issue 1
84-86
EN
An exact equation of the isochromatic fringes of uniaxial crystals derived without usually adopted simplifications is presented. It enables to calculate the optical conoscopic figures for ideal crystals with different angular orientations of the optical axis with respect to the normal to the crystal surface. Conoscopic figures of large-size single crystals of lithium niobate and paratellurite were examined experimentally making use of a laser-based setup. The conoscopic figure evolution in operating acousto-optic devices was studied.
4
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Recent Advances in Acousto-Optic Instrumentation for Astronomy

52%
Yushkov K., Anikin S., Chizhikov S., Esipov V., Kolesnikov A., Makarov O., Molchanov V., Potanin S., Tatarnikov A.
Acta Physica Polonica A
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2015
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vol. 127
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issue 1
81-83
EN
We report recent progress and new developments of acousto-optic imaging spectrometers and spectropolarimeters for astronomical observations. Prototype performance of hyperspectral visible-to-near-UV and visible-to-near-IR imaging systems is demonstrated. Wide-angle acousto-optic paratellurite monochromators were designed and fabricated. The problem of artifacts in spectral images of celestial objects is studied.
5
Content available remote

Adaptive Optical Delay Lines for Femtosecond Laser Pulses Shaping

42%
Molchanov V., Chizhikov S., Makarov O., Solodovnikov N., Ginzburg V., Katin E., Khazanov E., Lozhkarev V., Yakovlev I., Epatko I., Serov R.
Acta Physica Polonica A
|
2009
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vol. 116
|
issue 3
355-358
EN
The paper is devoted to investigation of adaptive optical delay lines, intended for femtosecond pulse shaping. Experiments were performed in the sub PW laser system, based on optical parametrical chirped pulse amplification. The experimental device has revealed high spectral resolution (0.6 nm at 1250 nm) high efficiency, (70% over a 120 nm spectral width at 1250 nm) and flexibility of seed pulse amplitude control. Proper shaping of the transmission function of adaptive optical delay line allows to double the femtosecond pulse spectrum band width.
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