Steven D. Rogers

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Numerical simulations are used to solve the coupled partial differential equations describing stimulated Brillouin scattering (SBS) built up from random thermal phonons as a function of time and the longitudinal spatial coordinate in an optical fiber. In the case of a passive fiber, a laser beam is incident with constant power, but its frequency is linearly(More)
Biological systems organization and behavioral strategies allow for the rapid learning of the control of complex tasks. These approaches include the acquisition of skilled behavior through practice and the use of attention. Simulations that emulate these approaches are presented in which the generation of trajectories and the control of motion become(More)
Faraday isolators limit the power-scalability of multimode MOPA systems that use SBS to restore the diffraction-limited beam quality. We test a volume Bragg grating, a more scalable alternative, designed to separate wavelengths 0.0604nm (16GHz) apart.
Recent advancements in the automotive industry together with environmental concerns, global warming and energy independence issues have lead researchers and automotive manufacturers to go through comprehensive restructuring to electrify vehicles. Currently, the majority of the electrified vehicles in the market, plug-in hybrid electric vehicles (PHEVs) and(More)
A model is presented for coordinated community planning to address multiple service needs in two countries. Two communities, one in western Texas and one in the United Kingdom, found that despite the considerable efforts of multiple organizations, the local social, educational, and health services remained uncoordinated. Furthermore, there was no unified(More)
A master-oscillator power-amplifier with stimulated Brillouin scattering (SBS) beam cleanup or wavefront reversal typically incorporates a Faraday isolator to outcouple the Stokes light, limiting the power scalability. Volume Bragg gratings (VBGs) have the potential for scaling to higher powers. We report here the results of tests on a VBG designed to(More)
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