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Full-Text Articles in Physics
Dispersion Management For Optical Parametric Amplifiers In Midinfrared, Hüseyi̇n Çankaya
Dispersion Management For Optical Parametric Amplifiers In Midinfrared, Hüseyi̇n Çankaya
Turkish Journal of Physics
Midinfrared (MIR) is an attractive spectral region for many applications ranging from vibrational spectroscopy to attosecond physics. However, in this spectral region, the dispersion management techniques are not as mature as the ones in the near-infrared (NIR) or visible, which is a key ingredient of ultrafast laser technology. In this manuscript,thetransferofdispersionmanagementschemesforopticalparametric(chirpedpulse)amplifiers(OP(CP)As) from NIR to MIR is discussed. Among those, a scheme based on Martinez-type grating stretcher and a bulk compressor is proposed and numerically analyzed. As a case study, the proposed scheme is applied numerically to a 2-µm pumped two-stageopticalparametricamplifier(OPA)systemat4.06µm. InthemodelOPAsystem,theseedpulsesaregenerated by white-continuum in bulk crystal and then amplified via …
Nonlinear Frequency Conversion Of Light Inside A Microcavity, Emre Yüce
Nonlinear Frequency Conversion Of Light Inside A Microcavity, Emre Yüce
Turkish Journal of Physics
Changing the color of light in a small mode volume is essential for applications that require on-chip operation. Microcavities are profound structures given their property to confine light in a small mode volume. Here, I numerically investigate the frequency conversion of light in a microcavity and show that the frequency converted light intensity is distinguished from an open medium such as an optical fiber or a nonlinear crystal. I observe that the frequency converted light intensity increases with increased rate of change of the refractive index of the microcavity. Notably, this study shows that the intensity of the frequency converted …
Double Pulse Generation In A Highly Nonlinear Gaas Optical Waveguide, Jian Wei Wu
Double Pulse Generation In A Highly Nonlinear Gaas Optical Waveguide, Jian Wei Wu
Turkish Journal of Physics
This paper presents a simulation and investigation about the nonlinear interplay between an optical pulse and GaAs waveguide. The results obtained show that the nonlinear processes including self-phase modulation, 2-photon absorption, and free carrier related effects will have significant influences on the temporal shape and frequency spectrum of a propagating pulse in the GaAs waveguide with the result that 2-photon absorption can extend the pulse duration that can be again compressed by the free carrier absorption. The outcome spectrum is also asymmetrical due to the free carrier related effects, which takes on a complicated oscillation structure resulting from the interference. …
Effect Of A Wiggler Magnetic Field And The Ponderomotive Force On The Second Harmonic Generation In Laser-Plasma Interactions, Hassan Ranjbar Askari, Maryam Noroozi
Effect Of A Wiggler Magnetic Field And The Ponderomotive Force On The Second Harmonic Generation In Laser-Plasma Interactions, Hassan Ranjbar Askari, Maryam Noroozi
Turkish Journal of Physics
In this paper, we consider second harmonic generation and its phase-matching in an underdense plasma in the presence of a wiggler magnetic field. Wiggler magnetic field plays both a dynamic role in producing the traverse harmonic current and a kinematical role in ensuring phase-matching. The inertial ponderomotive force \rho (\vec{u} . \vec \nabla) \vec{u} is a source of harmonic generation. \vec{u} beats with itself to produce a different harmonic. The inertial ponderomotive force can also affect the efficiency of second harmonic generation; and its effect on second harmonic generation is also considered.