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1

Modelling of reproduction process for power laser radiation

Owsik J., Liberman A. A., Kovalev A. A., Moskaluk S. A.

Optica Applicata

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2012

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Vol. 42, nr 1

147-156

EN

The model and algorithms for analysis of the laser photoinduced processes were developed using numerical simulations. A statistics of the process was carried out by averaging over a hundred laser pulses. A special correction algorithm was created. A standard uncertainty of the results from the output laser signals without any correction was equal to 0.003527, while for the expected value was equal to about 1.000510. After correction procedure standard uncertainty of results was 0.000479 for the expected value equal to 0.999955. Due to the applied correction methodology of laser signal analysis, the uncertainty can decrease by one order of magnitude. The proposed approach may be used for describing photoinduced nonlinear optical processes with time duration from nanosecond to microsecond.

2

Investigations of dynamic photorefractivity regime by optical polarizing microscopy

Agashkov A. V., Kovalev A. A., Parka J.

Opto-Electronics Review

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2009

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Vol. 17, No. 2

99-104

EN

We present a technique, based on optical polarizing microscopy, and results of direct observation of the optical interference field effect on the transient domains excited by ac electric field in a nematic planar cell with photosensitive aligning layers. The light source used in a microscope operated in DC mode as well as in triggered pulse one. Obtained microscopic snapshots of transient domain structure confirmed our assumption of the transient domains reordering (trapping) by the low intensity optical interference field.

3

Mathematical modelling of a reproduction process of the average power unit of laser radiation and transfer of its value

Owsik J., Janucki J., Libermann A. A., Kotyuk A. F., Kovalev A. A., Moskaluk S. A.

Journal of Technical Physics

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2007

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Vol. 48, no 2

67-76

EN

Mathematical model of a reproduction process of average radiation power of laser and of its value transfer has been developed. Also, an algorithm for correction of the result of this process, improving metrological properties of a standard, has been formulated. The paper presents the results of theoretical tests proving correctness of the assumptions used in the model.