Yuri T. Mazurenko

Time-domain Fourier transform holography and possible applications in signal processing

The principles of holographic storage and the reconstruction of short light pulses based on spatial spectral decomposition of radiation are described. This method may be designated as time-domain Fourier transform holography or spectral holography. Also described are various transformations of optical time signals based on holographic spectral filtering and dynamic interaction of spectral decomposition waves in nonlinear media. A system of methods of time signal processing based on spectral holography is proposed. Among these methods are shaping optical pulses, space-time conversions of signals, matched filtering, and recognition oftime optical signals. In addition, the possibilities for realizing time-division multiplexing of data streams using dynamic spectral holography are shown.

Recording and reconstruction of femtosecond light pulses using volume holograms

Abstract Recording and reconstruction of the temporal profile of femtosecond laser pulses is realized by holography using the volume photorefractive polymer medium Reoxan. This medium is characterized by a rather high sensitivity and the ability to create holograms with high diffraction efficiency. After some theoretical consideration the principles and properties of the recording medium are discussed, the experimental setup is described, and the main results of the experiments are presented.

Spectral holography of pico- and nanosecond laser pulses

Recording and reconstruction of pico- and nanosecond pulses were accomplished with spectral holography. The developing of spectral holography in nanosecond time-domain was provided while using high-spectral-resolution equipment based on Fabry-Perot etalon with the side entrance/exit. The recognition of shaped nanosecond light pulses was also realized.

Spectral-correlation method for the imaging of highly scattering objects

The novel method for the imaging of highly scattering objects is proposed. The method is based on the measurements of two-frequency correlations of scattered radiation.

Optical tomography based on spectral correlations of scattered radiation

The possibilities are proposed of imaging of highly scattering objects based on the measurements of correlation characteristics of the spectrum of scattered radiation.

Three-dimensional holography of femtosecond laser pulses

The results of the holographic recording and reconstruction of the time-domain profile of femtosecond laser pulses in the polymer volume medium named Reoxan are presented. The experimental data show the possibility of the effective spectral filtering to control the shape of ultrashort pulses.

Asymptotically exact analytical solution of the problem of vibrational quantum beats in molecular electronic transitions

In order to calculate the characteristics of vibrational quantum beats we use the Heisenberg (time-domain) approach to the nonlinear properties of vibronic spectra. While using this approach, the intensity of emission may be expressed as the convolution-type integral that contains the nonlinear-response function. To evaluate this integral the Laplace method is applied. In so doing the value of the Stokes shift is used as a natural great parameter. This allowed the simple expressions describing the manifestations of vibrational quantum beats to be obtained.

Spectral vision: production of longitudinal images of diffusely scattered objects by spectral interferometric method

The spectral interferometric method of the objects longitudinal spatial structure observation is developed. It is based on spectral distribution correlation analysis of the radiation scattered by diffusely scattering objects. For this reason the developed method is called a spectral vision.

Three-dimensional holography of nonstationary waves

Holographic storage and reconstruction of nonstationary waves can be accomplished in spectrally nonselective media through the use of a three-dimensional recording medium, as well as by the two- and three-dimensional holography of waves that are produced via spectral decomposition of light pulses. Attention is given to the superfast scanning of light beams and the possibility of picosec-femtosec chronophotography. It is shown that the interactions of spectrally resolved ultrashort wave packets with monochromatic waves allows the formation of holographic analogs of moving optical elements, while using neither direct nor indirect macroscopic shifts of optical hardware.