Zobrazeno 1 - 10
of 20
pro vyhledávání: '"G. D. Hovhannisyan"'
Nonlinear Optical Method of Determination the Chirp of Broadband Femtosecond Laser Pulse in IR-Range
Publikováno v:
Optical Memory and Neural Networks. 29:165-178
A new method for determining the chirp of a femtosecond broadband IR laser pulse at a central wavelength of 2.5 μm, based on the generation of a spectral supercontinuum in the field of a spectrally limited femtosecond laser pulse, propagating in a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac2a82ca1e4e170eaf25c986c5f29309
https://doi.org/10.3103/s1060992x20030121
https://doi.org/10.3103/s1060992x20030121
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 53:112-128
A new method is proposed to determine the subpicosecond laser pulse chirp in the middle IR range at the central wavelength of 10 μm, based on the generation of the second-harmonic pulses both by the bandwidth-limited and frequency-modulated subpicos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::423875fc1d216a9a54a29c749704fa45
https://doi.org/10.3103/s1068337218020032
https://doi.org/10.3103/s1068337218020032
Autor:
G. D. Hovhannisyan, S. R. Melikyan, D. L. Hovhannisyan, K. B. Savkin, A. O. Vardanyan, S. V. Tikhomirov
Publikováno v:
Measurement Techniques. 60:794-800
A new femtosecond correlation nonlinear optical profilometer with micron spatial resolution is proposed, in order to increase the measurement accuracy of the heterogeneity profile of a surface at a distance up to 1 km. The principle of operation of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3498ba17cd6a4b842fb9d06ec76baef
https://doi.org/10.1007/s11018-017-1272-6
https://doi.org/10.1007/s11018-017-1272-6
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 52:18-31
The results of theoretical research and numerical simulation of the generation process of difference frequency radiation by the IR femtosecond laser pulse with the frequency modulation are presented. It is shown that to obtain the maximal generation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dc9a9fb7d5f1e149ad410685862c213
https://doi.org/10.3103/s1068337217010042
https://doi.org/10.3103/s1068337217010042
Autor:
G. D. Hovhannisyan, A. A. Hakhoumian
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 50:355-366
A method is proposed to determine the phase shift of the central frequency of the subpicosecond laser pulse in the mid-IR wavelength range. The method is based on the sum-frequency generation of radiation by two identical linearly polarized laser sub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::608be5dd73dc7c5ede76ded2a2a84932
https://doi.org/10.3103/s1068337215040076
https://doi.org/10.3103/s1068337215040076
Autor:
A. A. Hakhumyan, G. D. Hovhannisyan
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 50:158-169
A method for the phase offset determining of the central frequency laser pulse with the duration of a few cycles with respect to envelope is proposed. The method is based on generating the difference frequency radiation by mutually orthogonal linearl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0d13a4f6dbbc8d5a78a595d070b4a28
https://doi.org/10.3103/s1068337215020097
https://doi.org/10.3103/s1068337215020097
Autor:
G. D. Hovhannisyan, A. A. Hakhoumian
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 49:60-68
We consider the process of generation of difference frequency in a GaAs crystal with periodic domain structure during propagation of a few-cycle laser pulse in the crystal in the regime of weakly expressed chromatic dispersion. Method of lines is use
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f28e3a197fb3ff71adb4b3d338e180ba
https://doi.org/10.3103/s1068337214020042
https://doi.org/10.3103/s1068337214020042
Autor:
G. D. Hovhannisyan
Publikováno v:
Optical Memory and Neural Networks. 22:135-147
The results of numerical study of the generation process of summary and difference frequency radiations (SFR and DFR) arising via interaction of linearly polarized a few cycle laser pulses propagating in a GaSe crystal is present. The interaction of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac4b96a569036df8b7614118807389dc
https://doi.org/10.3103/s1060992x13030041
https://doi.org/10.3103/s1060992x13030041
Autor:
G. D. Hovhannisyan
Publikováno v:
Optical Memory and Neural Networks. 22:37-55
The results of numerical study of the generation process of summary and difference frequency radiations (SFR and DFR) arising via interaction of linearly polarized a few-cycle laser pulses propagating in a quasi-phase-matching (QPM) LiNbO3 crystal is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::366b2e8990433109af5b3d62988f4576
https://doi.org/10.3103/s1060992x13010074
https://doi.org/10.3103/s1060992x13010074
Autor:
G. D. Hovhannisyan, V. O. Chaltikyan, A. H. Hovhannisyan, D. L. Hovhannisyan, K. A. Hovhannisyan
Publikováno v:
Optical Memory and Neural Networks. 21:145-158
We present the results of theoretical study of generation of difference frequency radiation in interaction of few-cycle laser pulse with a GaAs thin crystal. 2D numerical time-integration of system of nonlinear Maxwell equations for the TEy mode has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e004d59fb55c61f5238c7b966e6d6537
https://doi.org/10.3103/s1060992x12030022
https://doi.org/10.3103/s1060992x12030022