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Wave propagation in parity-time symmetric potentials is studied for the first time in systems involving a complex refractive index distribution with gain/loss. We demonstrate experimental results for an optically-pumped directional coupler in photorefractive LiNbO3.
We demonstrate tuning of the output spectrum of an HOM fiber module by changing the dispersion curve. Spectral feature wavelengths can be changed systematically by changing the location of the zero-dispersion wavelength.
Parabolic pulses in optical fibers have stimulated an increasing number of applications. We review here the physics underlying the generation of such pulses as well as the results obtained in a wide-range of experimental configurations.
We discuss soliton-self frequency shift in higher-order-mode (HOM) fibers below 1300 nm. HOM fibers, with its higher tolerance to nonlinearities and engineerable dispersion characteristics, will enable tunable, energetic femtosecond sources at new wavelength regions.
We observe Rabi oscillations in one-dimensional waveguide arrays. Adiabatic transitions, both direct and indirect (phonon-assisted), between extended Floquet-Bloch modes associated with different bands are stimulated by index-gratings inducing periodic modulations along the propagation direction.
Fiber lasers operating in the normal dispersion regime with a filter are analyzed with simulations of coupled-field equations. This model predicts new operating modes previously unrecognized by scalar simulations.
Fiber lasers modelocked by filtering of a chirped pulse are analyzed with the Ginzburg-Landau equation. A range of experimental pulse shapes are predicted remarkably well by an exact analytical solution, and constitute dissipative temporal solitons.
An interface between two periodic 1D arrays with self-focusing Kerr nonlinearities is shown experimentally to support strikingly different families of surface solitons due to differences in surface potential near the boundary.
We have implemented and tested a reflective spatial light modulator capable of patterning the far field intensity distribution of an intense pulsed laser beam, leading to spatially regularized multiple filamentation in air.
Fiber lasers operating in the normal dispersion regime with a filter are analyzed with simulations of coupled-field equations. This model predicts new operating modes previously unrecognized by scalar simulations.
Influence of the effective area spectral dependence on midinfrared supercontinuum generation is demonstrated. The behaviors of photonic crystal and step index fibers is compared. A 700nm width reduction is shown in step index ZBLAN fibers.
A tunable femtosecond fiber laser source based on pulse compression and soliton formation in hollow-core photonic bandgap fiber is presented. Efficient frequency-doubling produced 166 nJ pulse energy with 14 nm tuneability at green wavelengths.
A new modelocking regime governed by the Ginzburg-Landau equation is demonstrated in an anomalous dispersion fiber laser. Output pulses are long, flat-topped, and highly-down-chirped, with energies above 150 nJ and repetition rates below 300 kHz.
Fiber lasers modelocked by filtering of a chirped pulse are analyzed with the Ginzburg-Landau equation. A range of experimental pulse shapes are predicted remarkably well by an exact analytical solution, and constitute dissipative temporal solitons.
Fiber lasers operating in the normal dispersion regime with a filter are analyzed with simulations of coupled-field equations. This model predicts new operating modes previously unrecognized by scalar simulations.
An interface between two periodic 1D arrays with self-focusing Kerr nonlinearities is shown experimentally to support strikingly different families of surface solitons due to differences in surface potential near the boundary.
Influence of the effective area spectral dependence on midinfrared supercontinuum generation is demonstrated. The behaviors of photonic crystal and step index fibers is compared. A 700nm width reduction is shown in step index ZBLAN fibers.
A new modelocking regime governed by the Ginzburg-Landau equation is demonstrated in an anomalous dispersion fiber laser. Output pulses are long, flat-topped, and highly-down-chirped, with energies above 150 nJ and repetition rates below 300 kHz.
Fiber lasers modelocked by filtering of a chirped pulse are analyzed with the Ginzburg-Landau equation. A range of experimental pulse shapes are predicted remarkably well by an exact analytical solution, and constitute dissipative temporal solitons.
We observe Rabi oscillations in one-dimensional waveguide arrays. Adiabatic transitions, both direct and indirect (phonon-assisted), between extended Floquet-Bloch modes associated with different bands are stimulated by index-gratings inducing periodic modulations along the propagation direction.
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