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Zeytunyan A.,Yerevan State University | Muradyan A.,Yerevan State University | Yesayan G.,Yerevan State University | Mouradian L.,Yerevan State University | And 2 more authors.
Optics InfoBase Conference Papers | Year: 2010

We generate a 100 nm-bandwidth nonlinear-dispersive similariton in a passive fiber, and characterize it by means of its chirp measurement through the technique of frequency tuning and spectral compression in the sum-frequency generation process. © 2010 OSA /FiO/LS 2010.


Zeytunyan A.,Yerevan State University | Muradyan A.,Yerevan State University | Yesayan G.,Yerevan State University | Mouradian L.,Yerevan State University | And 2 more authors.
Optics InfoBase Conference Papers | Year: 2010

We generate a broadband (of ~100 nm bandwidth) nonlinear-dispersive similariton in a passive fiber, and characterize it through the chirp measurement, applying the technique of spectral compression and frequency tuning in the sum-frequency generation process. © 2010 Optical Society of America.


Toneyan H.,Yerevan State University | Zeytunyan A.,Yerevan State University | Mouradian L.,Yerevan State University | Tsakanov V.,Yerevan State University | And 4 more authors.
Frontiers in Optics, FiO 2014 | Year: 2014

We implement femtosecond pulse spectral compression through all-fiber and classic techniques by self-phase modulation, and similaritonic technique by sum-frequency generation, and experimentally demonstrate 8x, 12x, and 23x ratios for the process, respectively. © OSA 2014.


Mouradian L.Kh.,Yerevan State University | Grigoryan A.,Yerevan State University | Kutuzyan A.,Yerevan State University | Yesayan G.,Yerevan State University | And 6 more authors.
Proceedings of Frontiers in Optics 2015, FIO 2015 | Year: 2015

The nonlinear process of the pulse spectral self-compression in a medium with anomalous dispersion, the spectral analogue of the soliton effect compression, is introduced on the basis of our experimental observation and detailed numerical analysis. © OSA 2015.


Mouradian L.,Yerevan State University | Zeytunyan A.,Yerevan State University | Muradyan A.,Yerevan State University | Yesayan G.,Yerevan State University | And 2 more authors.
European Conference on Optical Communication, ECOC | Year: 2010

We generate a broadband similariton of 50 THz bandwidth, characterize it, and experiment its applications to the signal synthesis and analysis problems in femtosecond timescale, particularly for the similariton pulse temporal and spectral compression, similariton-based spectral interferometry and femtosecond oscilloscope. ©2010 IEEE.


Biancheri-Astier M.,University of Versailles | Ciarletti V.,University of Versailles | Reineix A.,Xlim Institute Of Recherche | Corbel C.,University of Versailles
IEEE Transactions on Geoscience and Remote Sensing | Year: 2011

In the frame of the European Space Agency's 2016 ExoMars mission, the Electromagnetic Investigation of the SubSurface (EISS) ground-penetrating radar has been designed and developed to perform deep soundings of the Martian subsurface from the surface. The EISS is designed to take advantage of the potential for bistatic radar investigations of the Martian subsurface between the fixed station (Lander) and the mobile platform (rover) and to characterize the 3-D structure and stratigraphy of the subsurface at depths ranging from 100 m to a few kilometers out to a 1-km radius around the lander. The EISS makes use of an electric dipole antenna made of two identical 35-m resistively loaded monopoles to transmit (and also receive in a monostatic mode) the high-frequency signal. However, the EISS's most innovative capability is its potential for bistatic operation, made possible by the accommodation of a small magnetic sensor on the rover (as initially planned for the ExoMars mission) which can measure the magnetic field (all three components) of the received waves whatever the direction and orientation of the rover. The aim of this paper is to show that the two monopoles of the antenna must be deployed on the surface in nearly opposite directions but not aligned to ensure good volume coverage around the transmitter. This paper is based on Finite Difference in Time Domain (FDTD) electromagnetic simulations. The simulated data have been used to study the impact of the angle between these two monopoles on the instrument performance. © 2006 IEEE.

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