Abstract:
Use of material selected from classes of low-melting watersoluble glasses is found to result in low Rayleigh scattering loss. Decreased insertion loss due to this mechanism becomes significant when losses due to other mechanisms have been minimized. Reduction of ultimate insertion loss relative to the more usual insoluble high-melting glasses may justify the additional expense incurred in designing protective systems.
Abstract:
Optical transmission line suitable for transmitting electromagnetic radiation within the visible spectrum and adjoining portions of the infrared and ultraviolet spectra consists of an alumina-doped borosilicate core and clad by an undoped borosilicate. Intrinsic insertion loss is lowered relative to a similar structure using undoped silica as the core material. Interfacial regions between core and clad may be sharply defined or graded.
Abstract:
Optical transmission lines constructed of fully fluorinated polymers in the amorphous state, such as fluorinated ethylene propylene, have low inherent insertion loss characteristics.
Abstract:
A METHOD AND AN APPARATUS ARE DESCRIBED FOR JOINING TOGETHER SINGLE OPTICAL FIBERS UNDER ADVERSE ENVIRONMENTAL CONDITIONS. THE FIBERS ARE ALIGNED COLLINERALY IN A HOLLOW SLEEVE, A QUANTITY OF LOW MELTING POINT TRANSPARENT THEREMOPLASTIC IS INSERTED IN THE SLEEVE AT THE JUNCTION OF THE TWO FIBERS AND HEAT IS APPLIED TO MELT THE THERMOPLASTIC CAUSING IT TO FLOW AROUND THE ALIGNED ENDS THEREBY PRODUCING AN OPTICALLY EFFICIENT BOND WHEN THE HEAT SOURCE IS REMOVED.
Abstract:
Optical transmission lines suitable for transmitting electromagnetic radiation within the visible spectrum and adjoining portions of the infrared and ultraviolet spectra consists of a pure amorphous silica core clad by a pure silica cladding of lowered refractive index relative to the core. Index lowering of the cladding relative to the core is a result of low temperature silica formation, e.g., by chemical vapor deposition. The cladding may manifest a substantial uniform refractive index of a value at least 0.1 percent less than that of the core or may be graded to such a lowered value.
Abstract:
Optical transmission lines suitable for transmitting electromagnetic radiation within the visible spectrum and adjoining portions of the infrared and ultraviolet spectra consists of a pure amorphous silica core clad by a B2O3-modified silica cladding. The cladding may manifest a substantial uniform refractive index of a value at least 0.1 percent less than that of the core or may be graded to such a lowered value.