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Laser generation in spectrally inhomogeneous condensed media during resonance cross relaxation

L. P. Godenko, Vladimir S. Mashkevich

Jun 1, 19750 citations

Frequency-tunable transient Cherenkov radiation from an inhomogeneous medium

A. V. Pakhomov, Rostislav M. Arkhipov

We propose a scheme to generate coherent radiation with a tunable frequency spectrum based on the excitation of an inhomogeneous thin layer of a resonant medium by an ultrashort pulse. The Cherenkov-type radiation emitted in a transient stage, i.e., while the excitation wavefront is still propagating over the medium, is shown to contain additional frequency components, which are determined by the spatial frequency components of the medium's density distribution and the excitation geometry. We demonstrate that the spectral content of this transient radiation can be adjusted in wide limits by controlling the spatial density distribution of the resonant medium and the shape of the excitation wavefront. Our theoretical results pave the way towards simple and compact swept-frequency or frequency-tunable optical oscillators as well as sources of the frequency-modulated optical radiation.We propose a scheme to generate coherent radiation with a tunable frequency spectrum based on the excitation of an inhomogeneous thin layer of a resonant medium by an ultrashort pulse. The Cherenkov-type radiation emitted in a transient stage, i.e., while the excitation wavefront is still propagating over the medium, is shown to contain additional frequency components, which are determined by the spatial frequency components of the medium's density distribution and the excitation geometry. We demonstrate that the spectral content of this transient radiation can be adjusted in wide limits by controlling the spatial density distribution of the resonant medium and the shape of the excitation wavefront. Our theoretical results pave the way towards simple and compact swept-frequency or frequency-tunable optical oscillators as well as sources of the frequency-modulated optical radiation.

Physical Review ASep 8, 20212 citations

Optical pulse propagation in an inhomogeneously broadened medium

George L. Lamb

Physics Letters AJan 1, 19698 citations

Investigation of a spectrally inhomogeneous active medium by the application of a giant external pulse

Ali M Aburabya, L. P. Godenko, Vladimir S. Mashkevich

A theory is given of the action of a giant external pulse on a spectrally inhomogeneous active medium emitting stimulated radiation. A method is developed for the determination of two microparameters of the active medium, which are the half-width of a line due to impurity centers and the cross-relaxation rate.

Soviet Journal of Quantum ElectronicsJun 30, 19770 citations

Steady propagation of pulses in resonant media

Hari Prakash, G. S. Bhatnagar

Il Nuovo cimento della Società italiana di fisica. B/Il Nuovo cimento BJun 1, 19790 citations

Simulation codes for figures 5, 6, 8 - 13: "Single-photon frequency comb generation in a giant-atom cavity coupled to a one-dimensional waveguide"

Vijayalekshmi Sivakumar, V S, Amal

The simulation codes for the figures (5,6,8,9,10,11,12,13) used in our article 'Single-photon frequency comb generation in a giant-atom cavity coupled to a one-dimensional waveguide' are available here. Fig. 5: Frequency spectra of a single photon Gaussian pulse initially outside the giant-atom cavity. Fig. 6: Cavity finesse as a function of the number of giant atoms and the number of coupling points per giant atom. Fig. 8: Frequency spectra of a single photon Gaussian pulse initially inside the giant-atom cavity. Fig. 9: Spectral enhancement as a function of the number of giant atoms and the number of coupling points per giant atom.Fig 10: Number of peaks, Peak location, Peak spacing as a function of the number of giant atoms and the number of coupling points per giant atom. Fig 11: Frequency spectra of a single photon Gaussian pulse initially inside the giant-atom cavity, with reduced coupling strength.Fig 12: Number of peaks, Peak location, Peak spacing as a function of the coupling strength. Fig 13: Cavity linewidth, Spectral enhancement as a function of the coupling strength.The simulation codes for the figures (5,6,8,9,10,11,12,13) used in our article 'Single-photon frequency comb generation in a giant-atom cavity coupled to a one-dimensional waveguide' are available here. Fig. 5: Frequency spectra of a single photon Gaussian pulse initially outside the giant-atom cavity. Fig. 6: Cavity finesse as a function of the number of giant atoms and the number of coupling points per giant atom. Fig. 8: Frequency spectra of a single photon Gaussian pulse initially inside the giant-atom cavity. Fig. 9: Spectral enhancement as a function of the number of giant atoms and the number of coupling points per giant atom.Fig 10: Number of peaks, Peak location, Peak spacing as a function of the number of giant atoms and the number of coupling points per giant atom. Fig 11: Frequency spectra of a single photon Gaussian pulse initially inside the giant-atom cavity, with reduced coupling strength.Fig 12: Number of peaks, Peak location, Peak spacing as a function of the coupling strength. Fig 13: Cavity linewidth, Spectral enhancement as a function of the coupling strength.

Dec 11, 20250 citations

Frequency tunable generation of giant pulses in spectrally inhomogeneous media

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