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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.
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.
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 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 investigate wavelength conversion by cross-phase modulation in the presence of strong dispersion and two photon absorption in highly nonlinear singlemode As2Se3 fiber, achieving conversion over a span of 30 nm.
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.
We demonstrate the formation of long period gratings in fluid-filled photonic bandgap fiber (PBGF). The unique modal properties of PBGFs allow for coupling to LP11-like modes at multiple wavelengths. We obtain good agreement with simulations.
All-fiber chirped-pulse amplification based on a large-mode-area Er:Yb-doped photonic-crystal fiber is presented. A dispersion-variable hybrid fiber stretcher compensates the peculiar dispersion of the hollow-core photonic-bandgap fiber compressor yielding transform-limited 440-fs pulses with 1-W average power.
We demonstrate the use of a prism-grating sequence to reduce third-order dispersion inside a modelocked Yb fiber laser. 33-fs pulses, the shortest from a fiber oscillator, can be generated with extremely clean profiles.
Using an anomalously dispersive microstructure fiber and two different saturable absorber mirrors at 1.06 mum, we demonstrate soliton-like 180-fs pulses in addition to 400-fs pulses with up to 0.1 nJ energy using only intra-fiber dispersion compensation.
We generate entangled photon-pairs from dispersion-shifted fiber at various temperatures. Two-photon interference with > 98% visibility and Bellpsilas inequality violation by > 8 standard deviations are observed at 77 K, without subtracting background Raman photons.
We present a frequency comb-based, frequency-resolved coherent LIDAR (FReCL) that provides higher performance than that of conventional pulsed range/Doppler LIDARs, dramatically reduces local oscillator timing requirements, and compensates for path dispersion.
A four-sideband stochastic analytical model is developed to investigate the impact of random fluctuations of the zero dispersion wavelength on two pump fiber-optic parametric processes. Theoretical predictions are in an excellent agreement with experimental results.
A new method allows to extract information on soliton content in complicated cases of pulse propagation in optical fiber, not accessible to Inverse Scattering Transform. As an example, a dispersion-managed second order soliton is demonstrated.
Direct-detection differential polarization-phase-shift keying is experimentally demonstrated at 10 Gsymbol/s, in which polarization-phase symbols are differentially decoded by using optical interferometric demodulation and electrical multilevel decision without the need of dynamic polarization control.
We experimentally demonstrate a stimulated Brillouin scattering free, all fiber phase conjugator using 1-m length of our fabricated bismuth oxide-based nonlinear fiber. Using the conjugator, error-free, dispersion compensated transmission of a 10-Gbit/s NRZ signal over a 150 km SMF transmission link is readily achieved.
We present the first wavelength-dependent measurements of the nonlinear figure of merit (FOM) in a highly nonlinear As2Se3 chalcogenide fiber, from 1415 nm to 1550 nm. We find that the FOM decreases to below one at 1415 nm.
Scattering of a dispersive wave on a soliton in a cobweb PCF resulting in generation of new spectral components is observed directly with XFROG technique. Recent analytical theory and numerical modeling confirm the results.
Detailed experimental investigations of the recently discovered temporal soliton molecules are reported. The optical fiber length was now extended; thus stable and unstable regimes of the soliton molecule can be distinguished from another more precisely.
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