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Microwave and optical frequency references are simultaneously transferred through fiber using a frequency-stabilized mode-locked Er-fiber laser comb. The instability for transferred microwave and optical frequencies are 2.0times10-13 and 7.5times10-15@1 s, respectively, for 3 km transmission.
We realized a continuous-wave terahertz spectrometer based on optical heterodyning of two near-infrared distributed-feedback diode lasers. Using active frequency stabilization we achieve 1 MHz resolution and a signal-to-noise ratio up to 80 dB.
5-order enhancement in system sensitivity of resonator fiber optic gyroscope by polarization-noise suppression using twice 90deg polarization-axis rotated splicing is numerically demonstrated. The optimal condition to suppress polarization-noise is demonstrated experimentally by temperature control.
A blazed grating is used for the separation of single photons from photon pairs. The Fraunhofer far field of the two-photon rate depends on the spatial correlation strength of the photons and enables correlation characterizations.
Second-harmonic generation is demonstrated in periodically intermixed GaAs/AlGaAs superlattice waveguides by Type-II phase matching. Second-harmonic powers of 2.0 muW were generated at fundamental phase matching wavelength of 1577.4 nm.
Dynamic mass density of a composite can differ from its static counterpart when there are relative motions between the components. Realizations of negative dynamic mass density composites and their theoretical underpinnings will be presented.
Intersubband cavity polaritons in a quantum well waveguide structure are photogenerated by 12-fs near-infrared pulses. Multi-THz transients trace the non-adiabatic switch-on of ultrastrong light-matter coupling and the conversion of bare photons into cavity polaritons.
A cladding-modulated Bragg grating implemented using periodic placements of silicon cylinders in the cladding along a silicon waveguide is proposed. Modeling results are verified experimentally, demonstrating coupling strengths differing by an order of magnitude.
We report detailed spectral and spatial characterization of a 0.1-MeV-0.8 MeV tunable ultra-bright laser-based Compton scattering source. Nuclear Resonance Fluorescence experiments with the source are also presented.
A stable Sagnac spectral shearing interferometer generating a 0.7-nm shear and interferograms resolvable with a low-resolution spectrometer is demonstrated for real-time optical pulse characterization at microwatt average power.
A radially polarized beam was amplified up to 1.1 W by passing through an Yb-doped double clad fiber pumped by a semiconductor laser, maintaining both the polarization and intensity patterns of the input beam.
Three-dimensional icosahedral dielectric photonic quasicrystals previously revealed highly structured transmittance spectra and unusual photon transport properties. Using a periodic approximant approach, we show that all these findings are consistent with multiple scattering of light.
Novel approach to improve light extraction efficiency of InGaN-based light emitting diodes with polydimethylsiloxane concave microstructures arrays was demonstrated, which leads to enhancement of extraction efficiency by 1.60-times in good agreement with simulation.
A pump combiner with single-mode PM signal feed-through designed for an air-clad photonic crystal fiber is demonstrated. Signal coupling is realized by a novel taper element allowing single-mode guidance at a taper ratio of 3.7.
We use dual-quadrature spectral interferometry to demonstrate single shot amplitude and phase retrieval of shaped waveforms generated from a 10 GHz optical frequency comb and switched at the repetition rate of the frequency comb.
An all-fiber-integrated supercontinuum laser having time-averaged power scalable up to 10.5 W with diffraction limited beam quality is demonstrated. The SC pulses can be generated with arbitrary modulation patterns having on/off durations as short as 10 muS.
We present the theory and experimental realization of simultaneously localized and strongly coupled optical and mechanical modes in periodic nanostructures. The mechanical properties of localized phonons with Gigahertz frequencies and sub-picogram masses are studied via all-optical measurements.
A frequency comb is phase-locked to a CW laser with an electro-optic-modulator providing 1.6 MHz feedback bandwidth. Residual phase noise is as low as -94 dBc/Hz, and the comb remained locked under mechanical vibration of up to 1.9 g.
We experimentally study the polarization dynamics (orientation and ellipticity) of near infrared light transmitted through magnetooptic yttrium iron garnet isolator crystal pairs using a modified balanced detection scheme. When the pair separation is in the sub-millimeter range, we observed a proximity effect in which the saturation field is reduced by up to 20%. Calculations using a 1D model suggest...
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.
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