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We demonstrate a radiation mode coupler based on a tilted fiber Bragg grating that spatially demultiplexes different modes in a few-mode fiber. The observed radiation patterns match well with those theoretically predicted using the volume current method. The correlations in measured relative modal weights obtained from this device and an accurate interferometric measurement used as a reference, suggest...
We present a new class of higher order mode fibers that decouple the dispersion-versus-mode-area trade-off in conventional fibers. This enables exploiting the multitude of nonlinear optical effects afforded by fibers, but at energy-levels potentially approaching bulk crystals.
We demonstrate parametric amplification at 1.064 μm with a 600 μm2 fiber mode, with 94 nm gain bandwidth, cascade products over 315 nm bandwidth, and 6 kW peak power in the Stokes and anti-Stokes lines.
We demonstrate a sidetap modal channel monitor based on a tilted Bragg grating, where different modes radiate at different angles. We qualitatively correlate the observed modal power partitioning with more accurate interferometer-based measurements.
We demonstrate an all-fiber method to generate a 28um × 6.5um optical bottle using coherent superpositions of fiber-grating-based Bessel beams. Our method enables precise beam control by tuning the relative modal weight and phase of the two beams.
We observe waveguide exciton-polaritons with large room temperature Rabi splittings of 190 meV and 125 meV for TE and TM modes respectively. The experimental results are in good agreement with numerical simulations.
Making use of the field enhancement and confinement, and thermal management, of a template-stripped localized surface plasmon resonance structure, we experimentally demonstrate the trapping and rotation of 110 nm diameter polystyrene nanoparticles.
LP0, m fiber cladding modes propagate as Bessel beams in free space. We show that selecting the mode order with a long period grating enables tuning of the propagation distance and width of the center spot.
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