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Optical tuning of guided mode resonance (GMR) is demonstrated in an azo-copolymer waveguide grating structure (WGS), comprised of a one-dimensional holographic surface relief grating inscribed on top of an azo-copolymer planar waveguide layer. The resonance wavelength of GMR is blue-shifted by pumping the WGS with a linear polarized laser beam at 514 nm as a result of the photoinduced refractive index...
A dispersion-flattened microresonator based on slot waveguide exhibits great performance improvement of Kerr frequency combs by engineering the 2nd-order dispersion amount and anomalous-dispersion bandwidth with all-order dispersion taken into account.
The proposed silicon-on-nitride (SON) waveguide exhibits an ultrabroadband (4200 nm), low chromatic dispersion in the mid-infrared (MIR) wavelength region from 2430 to 6630 nm. It has two zero-dispersion wavelengths within the span. Even at 6 , the nonlinear coefficients of the SON waveguides are still comparable with the ones of integrated...
We demonstrate all-optical sub-channel data erasing/updating based on cascaded sum-and difference-frequency generation in a single PPLN waveguide. OSNR penalty of 2-dB for RZ and 4-dB for NRZ at a BER of 2e-3 are achieved.
A 3-D chirped high-contrast grating hollow-core waveguide (HCG-HW) exhibits highly efficient 2-D (transverse and lateral) light confinement. Compared with step-index ones, laterally chirped HCG-HWs (graded index) can pronouncedly reduce the propagation loss without compromising the lateral index contrast. Simulation results show that a propagation loss as low as 0.04 dB/cm can be achieved...
A tapped delay-line matched filter is designed using high-contrast grating hollow-core waveguides. Simulation results indicate a SNR gain of 18.24dB, which is ∼83% of an idea matched filter, and a fabrication tolerance of ∼ 75-nm.
We designed and characterized a high performance narrow band FIR filter based on the low loss High Contrast Grating (HCG) Hollow-core Waveguides (HCW) with at least 30 dB rejection and 0.1 dB power leakage.
Chirped high-contrast-grating hollow-core waveguide demonstrates a >10× loss reduction. Simulation shows that a propagation loss as low as 0.04 dB/cm can be achieved with a nonlinear coefficient on the order of 10−5 /W/m.
A low insertion loss optical coupler is designed using chirped high-contrast-grating hollow-core waveguide. 100% tuning of power coupling ratio is realized through mechanically adjusting the waveguide height by ∼3 um.
We propose and experimentally demonstrate UWB monocycle generation using non-degenerated two-photon absorption in a silicon waveguide. A 8.69-GHz 10-dB bandwidth (BW) and a 154.5% fractional bandwidth is achieved with a ∼125 ps monocycle pulse.
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