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We experimentally demonstrate a novel scheme for generating pump and idler optical waves phase aligned to an input signal carrier for phase sensitive amplification.
With a highly sensitive one dimensional photonic crystal biosensor, we have demonstrated quantitative real-time label-free detection of DNA oligomers, including binding to protein, concentration detection limits, and base-mismatched hybridization.
An optical switch based-on two electrically coupled SOAs is demonstrated. Experiments show switching frequencies in MHz range with 4 dB contrast ratio. The performance can be improved up to GHz range employing photonic integrated devices.
We show through numerical simulations that optical pulses in silicon waveguides can undergo significant self-induced changes in their polarization state. These changes are mediated mostly by free-carrier dispersion and depend on waveguide dimensions.
We demonstrate detection and sizing of single nanoparticles down to 30 nm by monitoring the mode splitting induced by a nanoparticle in an ultra-high quality factor (UHQ) microtoroid. Theory and methods are discussed.
We numerically analyze chromatic dispersion in tightly curved strip and slot waveguides with high index contrast. Zero-dispersion-wavelength may have a shift over 220 nm when bending radius is reduced to a few microns.
We reconstruct the magnetic near-field and source current distribution of a linear coupled-dipole IR optical antenna from the complete 3D electric vector near-field as probed using scattering-type scanning near-field optical microscopy. Fine details associated with antenna coupling are observed.
We observe a rich angular spectrum resulting from the Auger decay of a single K-shell vacancy but an apparent angle independence for the decay of a double core vacancy “localized” to a single atom.
We report on the latest development in electro-optic chaos communications intended for physical layer optical data protection. The nonlinear delayed feedback scheme makes use of the optical phase as the dynamical variable exhibiting a high complexity broadband chaos. The proposed setup was found to be a superior alternative approach to the most popular way in Optics to generate chaos, the feedback...
We demonstrate an error-free add-drop filter for a 10 Gbps signal, tunable over 16 nm. The structure consists of a series of ring resonators embedded between micro-heaters designed to ensure homogeneous temperature distribtion.
A linearly polarized fiber laser emitting at 979 nm with an output power of 2 W is presented. By using a photodarkening-resistant Yb/Ce/Al-codoped silica fiber, degradation-free operation is achieved over several hours.
We developed a high speed, low power optical interconnect system using a high efficiency 1060 nm VCSEL. Clear eye diagrams are recorded at 10 Gbps with lower than 2 mA bias and 150 mVp-p modulation voltage.
We report tributary channel data traffic grooming/exchange of pol-muxed DPSK signal based on Kerr-induced nonlinear polarization rotation. 8 tributary channel data grooming between two pol-muxed 80-Gbit/s DPSK channels is demonstrated with a penalty of <4 dB.
A Mach-Zehnder refractive index sensor is inscribed in a microfluidic lab-on-a-chip by exploiting the unique three-dimensional capabilities of femtosecond laser fabrication. This enables high sensitivity and spatially resolved label-free detection of biomolecules.
We report on an idler octave-spanning (1.6 – 3.5µm) cw titanium-sapphire pump-resonant signal-resonant optical parametric oscillator delivering 10 to 50mW, for multi-species trace gas sensing based on cavity ring down spectroscopy.
We report on the generation of high-energy femtosecond pulses from an ytterbium-doped photonic crystal fiber oscillator. Sub-150 fs pulses are obtained at low-cavity dispersion. By increasing the normal cavity dispersion, pulse energy exceeds 100 nJ.
Opto-fluidic technique demonstrated non-destructive characterization of nonlinear optical waveguide by modifying effective index of optical mode. Nonuniformity of phase matching wavelength, degradation factor of NLO performance, is revealed in a waveguide wavelength converter.
Using electron-beam-induced deposition and focused-ion-beam milling, we have fabricated and demonstrated a nanofocusing optical transformer with a 3-dimensionally tapered tip. At the tip, the light is confined to 13-by-80-nm area with intensity enhancement exceeding 1500.
We report the first continuous-wave optical-parametric-oscillator pumped externally by an optically-pumped-semiconductor-laser. The device provides >2W of frequency-stable output (>60 MHz over 60 seconds) at 48.7% extraction efficiency in TEM00 spatial beam tunable over 873–1360 nm.
We demonstrate an all-THz fiber-based swept-source imaging radar system. Our experiment shows that this radar can be used in real time to nondestructively detect and locate the concealed living objects with high stability and sensitivity.
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