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A hollow-core fiber exhibiting three transmission windows from the NIR to the UV was designed and characterized. A good agreement between computed and measured loss was obtained. 2 dB/m loss was demonstrated at 0.355 mum-wavelength.
We present a novel type of stable (3+1)D solitary self-trapped wave-packet arising from the interplay between local and nonlocal (in time and space) nonlinearities, which can be generated under experimentally feasible conditions.
Calculations show qualitative changes in relative index and group delay induced by typical coiling of fiber. Comparison with S2 measurement shows excellent agreement in relative group delay.
The Kramers-Kronig technique is used to reconstruct the impulse-response of a diffusive media with picosecond resolution. We demonstrate the ability to image an object within clothing at a distance of 3 m from the detection system.
We discuss design and tuning of second-harmonic generation in a GaAs microdisk. Quasi-phasematching is automatically achieved in a microdisk geometry, but efficient mixing requires resonating all waves, which leads to stringent tuning requirements.
We demonstrate the generation of 48 fs, 226 nJ pulses from an Yb-doped fiber amplifier with 18 W of average power. The system uses a simple stretcher-free, single-stage amplifier configuration. Gain fiber length and pump wavelength are chosen in order to achieve the optimum pulse width and pulse energy.
Spatially resolved spectral interferometry is used to measure the mode content of a Yb-doped photonic crystal-fiber amplifier having a 2300-mum2 mode area. The impact of misalignment at signal injection on the relative mode powers is quantified.
471-fs pulses are generated by injecting a 33-ps pulse train, obtained from pulse carving a 1.55-mum CW DFB laser, into a time-lens loop. High repetition rate of 1.1 GHz is demonstrated.
We have developed a normal-dispersion passively mode-locked ytterbium-doped fiber laser with a fundamental repetition rate higher than 400 MHz at a wavelength of ~1085 nm by use of a short linear cavity design.
We measure the direction of a TEM00 Gaussian beam reflected from an air-glass interface. We report experimental evidence of an angular deviation of the beam axis from the Reflection Law for a light ray.
We report the demonstration of a single-longitudinal-mode 593.5-nm laser achieved via intracavity sum-frequency generation of a dual-wavelength cw Nd:YVO4 laser using two volume-Bragg-grating reflectors. >2.5-mW 593.5-nm orange light was obtained with this compact laser system.
We controlled the carrier-envelope phase (CEP) of a 5.5-fs, 2.7-mJ optical parametric chirped-pulse amplification system at a 1-kHz repetition rate, and observed clear CEP dependence of high harmonics.
A supercontinuum absorption spectroscopy (SAS) approach for measurement of atmospheric constituents is extended to offer increased capability of detecting concentrations of gaseous species. An atmospheric path length greater than 600 m is utilized in the multi-wavelength differential absorption setup. A multi-wavelength algorithm for analysis of the spectra measurements obtained from the return of...
Using polarization spectroscopy to control the shape of the diode current ramp while tuning an external cavity diode laser we achieved mode-hop free tuning of up to 105 GHz with an uncoated, off-the-shelf laser diode.
We show that the retracing behavior based in slant-stripe-type periodically-poled RbTiOPO4 can be used to efficiently achieve second-harmonic generation within an ultra-wide spectral range of 1.7-4.0 mum.
THz photonics combines optics and ultrafast lasers with electronics to generate subps THz pulses. The use of such pulses for science and technology will be illustrated. Opportunities in research and applications will be described.
Vacuum ultraviolet fluorescence from micro-pulling down method-grown Er:LiCAF is found to have 163-nm peak emission with 1.3-mus lifetime, making it one of the shortest emission wavelengths from solid-state materials reported.
We demonstrate the generation of pulses with twenty-five microjoules of energy generated from a thin-disk oscillator at repetition rates below three megahertz with the potential to drive high field experiments. First micromachining experiments are presented.
We for the first time present designs of high-Q photonic crystal nanocavities in the cases previously rendered ldquoimpossiblerdquo, including an ultra-high Q dual-polarized nanocavities, high Q/V cavities based on low-index materials, and high-Q air-band-mode cavities.
We report progress towards the development of an ultrafast optical beam deflector enabling the single-shot recording of optical signals with near ps resolution at high dynamic range (103-105).
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