Nufern

Verrillon, Inc.

Kanxian Wei

Liang Dong

Bryce Neilson Samson

Imtiaz Majid

Chih-Hao Wang

Abdel Soufiane

Gary Drenzek

The present invention relates generally to optical waveguides, and more particularly to optical fibers suitable for use with high optical energies, and to devices using them. One aspect of the invention is an optical fiber having a cross-sectional profile comprising a base glass material; a first ring of first low refractive index glass features disposed in the base glass material; and a second ring of second low refractive index glass features disposed in the base glass material outside of and substantially concentric with the first ring, wherein the optical fiber has a loss of less than about 0.7 dB/m for the fundamental mode and a loss greater than about 10 dB/m for all other modes in a coiled configuration having a coil diameter in the range of about 20 cm to about 200 cm.

All glass leakage channel fibers and devices using them

An optical fiber includes a glass fiber having a glass core and a cladding which contains voids spaced apart from the core. The voids act as trapping sites for ingressing molecules from the surrounding environment, thereby reducing the effect of such molecules on the fiber's light-transmission properties.

Optical fibers with improved resistance to ingressing molecules

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Shrewsbury, MA, United States of America

Kanxian Wei