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RG Harrison

Publications and source records attributed to RG Harrison.

At least 19 recordsLinked to original sources
PubMed2000

Observation of inhomogeneous spectral broadening of stimulated brillouin scattering in an optical fiber

We report experimental results which show that the stimulated Brillouin scattering (SBS) spectrum in an optical fiber is inhomogeneous, exhibiting spectral broadening and hole burning under cw monochromatic laser excitation. This phenomenon arises from the waveguide interaction of the pump and Stokes signals and is a fundamental property of SBS in waveguiding systems due to their ability to confine a fan of radiation wave vector directions.

Journal Article↗
PubMed2000

Efficient implementation of the gaussian kernel algorithm in estimating invariants and noise level from noisy time series data

We describe an efficient algorithm which computes the Gaussian kernel correlation integral from noisy time series; this is subsequently used to estimate the underlying correlation dimension and noise level in the noisy data. The algorithm first decomposes the integral core into two separate calculations, reducing computing time from O(N2xN(b)) to O(N2+N(2)(b)). With other further improvements, this algorithm can speed up the calculation of the Gaussian kernel correlation integral by a factor of gamma approximately (2-10)N(b). We use typical examples to demonstrate the use of the improved Gaussian kernel algorithm.

Journal Article↗