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We experimentally demonstrate group velocity control of 40-fs, 1400-nm pulses through chi(2)-cascaded interactions under large group velocity mismatch. Group delay shifts up to 50 fs are achieved by propagation in a 25-mm-long PPSLT crystal.
Cross-phase-modulation-induced pulse delay or advancement in an optical fiber is analyzed. It is shown that XPM and group-velocity mismatch can lead to controllable pulse delay or advancement with negligible frequency shift.
We show analytically and numerically that a stationary rescaled pulse (SRP) can exist in a dispersion decreasing fiber with a linearly decreasing dispersion profile. By using the SRP, we demonstrate extremely pedestal-free pulse compression.
We present a theoretical study of the extinction properties of spherical metal-dielectric-metal layered structures. Our analysis shows tunable absorption and transparency, as well as possible left-handed behavior in the visible spectral range.
We report high transmission through SiC films when a two-dimensional periodic arrangement of subwavelength cylindrical holes is made. We attribute the near-perfect transmission peak inside the polariton gap of SiC to propagating waveguide modes.
Control of the carrier-envelope phase by a composite glass plate is demonstrated without changing chirp or energy of the transmitted pulses. The effect is verified intracavity employing an octave-spanning laser and external with an autocorrelator.
We investigated third harmonic generation and triple photon generation properties of TiO2 rutile single crystal, including phase-matching and figure of merit. We demonstrated that TiO2 is more efficient than KTiOPO4.
A nonlinear index guiding silica PCF is optimized for efficient second harmonic generation through dispersion calculations zero group velocity mismatch is possible for any pump wavelength above 80 nm. Very high conversion efficiencies and bandwidths are found.
The development of high finesse resonators for broadband frequency combs enabled the extension of the versatile frequency comb technique into the extreme ultraviolet with all its implications. We describe new developments in this field.
We demonstrate transmission of 16 WDM channels at 10 Gbit/s with 50 GHz channel spacing over 3 times 80 km NZDSF, with small OSNR penalty, using only a single Raman-pumped dispersion compensating module positioned before the receiver.
Nonlinearity management is explored as a multilevel tool to obtain maximum transmission reach in a WDM system. A technique for the fast calculation of the optimal dispersion pre-compensation in systems with distributed amplification is proposed.
Using an accurate full-vectorial finite element method, a realistic model of a fabricated dispersion compensating photonic crystal fiber is analyzed. An almost flat Raman-gain spectrum (gain-ripples at just plusmn0.48-dB) is obtained using a single pump.
We present a novel and simple method of producing small core silica holey fibres with nonlinearity close to the maximum achievable. An effective area of 1.6 mum2 with a loss of 0.18 dB/m at 1.55 mum were achieved.
We demonstrate the longest unrepeatered and uncompensated SOA-based transmission of 16times10 Gbit/s channels over 140 km single mode (G.652) fiber. We exploit the DPSK modulation format, two commercial SOA devices and a frequency-periodic narrow optical filter.
We report on the propagation of high peak power higher-order solitons and their break up due to Raman scattering and third order dispersion over 30 m in hollow core photonic bandgap fibers.
We demonstrate efficient compression of low-power 6 ps pulses down to 420 fs pedestal free pulses at 1.5 mum in an all-fiber scheme employing only 4 meters of As2Se3 fiber and a tailored chirped fiber Bragg grating.
We present experimental and theoretical investigation of modulation instability process in large normal dispersion regime leading to visible continuum generation. The influence of the input power and polarization state of the pump wavelengths are analyzed.
The group delay in low-loss, single-mode, 1-mm-long photonic crystal slab waveguides is measured using the phase-shift technique. Slow modes appear a promising approach for compact and massively integrated optical delay lines for signal processing.
We fabricated a photonic crystal superlens and clearly observed the focusing of light by the negative reflection, for the first time. It well agreed with the dispersion surface analysis and the FDTD simulation.
Using a bi-frequency pumped Raman amplifier in a Rb vapor cell, we demonstrate experimentally the condition for achieving a null group index, necessary for fast-light enhanced rotation sensing in a passive cavity Sagnac gyroscope.
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