Abstract:
The mineral and salts dispensing system is a filtration bag designed out of high strength woven geotextile fabric that is intended to filter fresh minerals/salt to the ground for deer, elk, or other animal consumption. The bag's functionality should last 2-3 years with normal use as it is UV stabilized to resist biodegrading; it is refillable with ease of installation and a cost-effective customizable solution for hunters.
Abstract:
The present invention relates to a type of optical fiber grating having an azimuthal refractive-index perturbation. The optical fiber includes a fiber grating that has a plurality of grating elements formed therein. At least one of the grating elements has a spatially varying index of refraction that varies azimuthally about the centerline of the optical fiber. The fiber grating acts as a band-stop optical spectral filter. In addition, since fiber-cladding modes are weakly-guided modes, their power can be easily dissipated by scattering, bending, stretching, and/or rotating the optical fiber. Multiple configurations of these gratings within an optical fiber are given. Methodologies are given for the fabrication of these gratings. Devices are presented which can dynamically attenuate, tune, switch, or modulate the wavelength spectral characteristics of an optical signal.