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Proceedings Paper

Single-shot temporal measurements of ultrashort pulses by means of polarimetric technique
Author(s): Aghassi A. Ohanian; Sergey Ishkhanian
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Paper Abstract

We propose a new technique of temporal measurements based on the determination of the radiation field's autocorrelation function. The technique does not request any non-linear process, and is applicable in the large spectral, temporal and energy range. The principle of the technique is based on the changing of radiation polarization in single-axe crystal. The resulting polarization allows determining the pulse duration, in case of given pulse shape. A single-axe crystal between two crossed polarizers is placed, oriented by 45 degree(s)-angle with respect to the main planes of them. The energy transition coefficient of the system is registered and the pulse duration is calculated considering the temporal delay between the two orthogonal components of the radiation and the pulse shape. The measurement's precision dramatically depends on the radiation wavelength, crystal length and refraction indexes, direct measurements of which is practically impossible. We used an additional optical channel to exclude the influence of mentioned factors on the measurement's precision. The presented technique is tested experimentally. The duration of Nd:YAG laser's picosecond pulses, as well as compressed pulses of the fiber-optic compressor are measured.

Paper Details

Date Published: 9 October 1998
PDF: 5 pages
Proc. SPIE 3418, Advances in Optical Beam Characterization and Measurements, (9 October 1998); doi: 10.1117/12.326652
Show Author Affiliations
Aghassi A. Ohanian, Yerevan State Univ. (Armenia)
Sergey Ishkhanian, Yerevan State Univ. (Armenia)

Published in SPIE Proceedings Vol. 3418:
Advances in Optical Beam Characterization and Measurements
Michel Piche, Editor(s)

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