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We present for the first time the group velocity dispersion of multiple distinguishable modes propagating in 3, 7 and 19 cell hollow core photonic bandgap fibres. Measurements are made by direct phase extraction from spectral domain low coherence interferometry.
On-chip analog signal performance of high-contrast-grating hollow-core-waveguide is evaluated. SFDR of >;100 dB can be achieved for IM3 over a wide RF frequency range of 80 GHz and optical wavelength band of 50 nm after a 100-m propagation. An optimal waveguide design can produce analog performance comparable to optical fibers, which is dramatically better when compared with integrated low-loss...
An analysis of a two-section folded waveguide TWT for terahertz radiation is performed. The theory of high frequency characteristics including the dispersion properties and the beam-wave interaction impedance of this structure are analyzed for nonlinear interaction analysis. A THz-band folded waveguide TWT using 10.8kV, 50mA electron beam is designed and the nonlinear beam-wave interaction in the...
We demonstrate a tunable optical delay element using wavelength conversion in a highly nonlinear fiber, dispersion compensating fiber, and optical phase conjugation. A continuous delay of up to 1.16-μs equaling >55,000 symbols at 50 Gb/s, for 100 Gb/s NRZ-DQPSK and 50 Gb/s NRZ-DPSK modulation formats, is demonstrated.
This paper uses a method to compute the kernel needed for dispersive scatterer computations numerically. FDDM works by substituting a Z-domain finite difference approximation for the transform variable in the Laplace transformed kernel. The inverse Z-transform of the result is the FDDM kernel. The method described here computes the inverse z-transform directly by integrating in the complex z plane...
In this paper, we present a study of error performance of linear dispersion codes. First, an upper bound of average error probability is derived for any signal-to-noise ratio. Based on this bound, a tight upper bound of average error probability at high signal-to-noise ratio is further derived to show the diversity advantage of linear dispersion codes. The tight bound demonstrates the relationship...
Quality control has demanded methods to quantify the mixing state of nanoparticles imbedded in polymeric materials. Several quantification methods are reviewed based on the analysis of images from electron microscopy. This includes the quadrat-based skewness, nearest neighbor distance, the k-function and Monte Carlo method. A novel method in which the dispersion and distribution are evaluated respectively...
We propose a novel reconfigurable time domain spectral phase encoding scheme for coherent OCDMA application. Proof-of-principle experiments of en/decoding with 16-chip, 20-GHz/chip BPSK codes and 1.25-Gbps data transmission have been successfully demonstrated using high speed phase modulator and AWG decoder.
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