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We present crystalline whispering gallery mode resonators (WGMR) operating as the efficient Raman lasers. Fundamental limitations on optical quality (Q) factor are discussed. A new resonant scattering phenomenon is observed.
We will describe experimental realization of two novel approaches to quantum interface between single photons and spins in atomic and solid-state systems. Progress towards implementation of potential applications of these techniques will be discussed.
We present direct experimental measurements of localized eigenmodes in disordered one-dimensional waveguide arrays. In the nonlinear regime we observe delocalization of localized states, exhibiting different features in the limits of weak and strong disorder.
We study the extended modes of a nonlinear quasi-periodic system and show that the nonlinear spectra are deformed versions of the Hofstadter butterfly. An optical realization of the Hofstadter butterfly is proposed.
We present experimental and numerical results of wavepacket expansion in one-dimensional disordered nonlinear waveguide arrays. We show that in 1D there is a direct transition from ballistic expansion to localization, which is accelerated by nonlinearity.
A delay-bandwidth product of 10.7 is achieved using ultra-fast intraband nonlinearities in semiconductor optical amplifiers to generate fast light. A novel chirped-pulse scheme enhances the fast light effect and generates delays in addition to advance.
Ultrashort pulse light-matter interactions in a semiconductor are theoretically investigated within the regime of resonant optical rectification. Using 5 fs pulse envelope areas of around 1.5-3 pi, a single-shot dependence on carrier-envelope-offset phase.
We report on the optical properties of a metal-organic photonic bandgap structure showing a peak transmission ~44% and that enhances the nonlinear optical properties of bulk Copper by up to an order of magnitude.
We demonstrate an actively and harmonically mode-locked laser employing a 151-cm-long bismuth-oxide-based erbium-doped fiber and a 250-cm-long bismuth-oxide-based highly nonlinear fiber. Stable 10-GHz short pulses are obtained with a 60-nm tuning range covering the CL-band.
We present new aspects of temporal dispersion in high resolution Fourier pulse shapers using VIPA based setups as a representative example. These effects should become significant in grating based setups when bandwidths approach an octave.
We present the first full theoretical and numerical analysis of the influence of the waveguide geometry and intrinsic material frequency dispersion of the nonlinearity, on the Si wires effective third-order nonlinearity and its frequency dispersion.
We demonstrate nonlinear compression of 2.5 ps and 1.2 ps laser pulses at 800 nm wavelength using a 35 m tapered hollow-core photonic bandgap fiber with continuously-decreasing dispersion.
We report on the fabrication of a tapered hollow-core photonic crystal fiber with a transition-length as long as 40 m for cascaded Stimulated-Raman-Scattering applications. The structural and optical characterization demonstrates the linearity of the taper.
A pulsewidth tunable 10 GHz flat-top pulse train is generated based on the combined action of active mode locking and nonlinear-polarization-rotation pulse shaping. The SMSR is 65 dB and the timing jitter is 145 fs.
We generate a highly-controlled, optically-dense, and repeatable Rb vapor inside of a hollow-core photonic bandgap fiber using light-induced atomic desorption. Here we present its generation dynamics and use for nonlinear quantum optical applications.
GaAs nano-wire waveguides were successfully fabricated on a SiO2/Si substrate for the first time. 15 dB cross loss modulation was achieved by a few mW continuous-wave pump power within a 1.5 mm-long waveguide.
A three-dimensional microscopic interferometer by the interval frequency sweep of the supercontinuum frequency comb generated by an optical pulse synthesizer was demonstrated. The spectral bandwidth was 80 nm. The interferometric peak width was 35 mum.
A table-top THz source has been employed to study the nonlinear response of semiconductors to near-half-cycle femtosecond pulses. We report nonlinear field-induced changes in the far infrared absorption coefficient, associated with impact ionization processes.
The authors theoretically analyze and interpret an effective mechanism, which employs optical filtering to enhance the microwave phase shift that can be achieved in semiconductor optical amplifiers based on slow and fast light effects.
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