Corning Incorporated

Ming Jun Li

Dana Craig Bookbinder

Pushkar Tandon

Scott Robertson Bickham

Xin Chen

Dale Robert Powers

Dmitri Vladislavovich Kuksenkov

Kevin Wallace Bennett

Richard Edward Wagner

Mark J Soulliere

Andrey Evgenievich Korolev

Vladimir Nikolaevich Nazarov

Konstantin Sergeevich Koreshkov

One embodiment of the disclosure relates to a few moded optical fiber comprises: a glass graded index core having alpha profile such that 2.0&#x2266;&#x3b1;&#x2266;2.15, a diameter Din the range of 13 microns to 40 microns, a maximum relative refractive index between 0.265 and 0.65 percent, core being structured to propagate more with X number of mode groups at a wavelength of 850 nm, wherein X is an integer greater than 1 and less than 8; and (b) a cladding including a depressed-index annular region surrounding the inner cladding. The fiber has an overfilled bandwidth greater than 2.0 GHz-km at 850 nm and relative microbending sensitivity &#x3b3; such that &#x3b3;&#x2266;1.5.

Few moded optical fiber and system incorporating such

According to some embodiments a few moded optical fiber includes a glass core structured to provide light amplification at an amplification wavelength and a cladding surrounding the core. According to some embodiments the core of the few moded optical fiber includes a portion that has an average concentration of rare earth dopant which is lower by at least 30%, and preferably by at least 50%, than the average concentration of the rare earth dopant at another portion of the core that is situated further from the core center.

Few mode rare earth doped optical fibers for optical amplifiers, and amplifiers using such fibers

A multimode optical fiber includes: (i) a graded index glass core having a radius Rin the range of 20 microns to 50 microns, a maximum relative refractive index &#x394;in the range between 0.5% and 3%; a graded index having a profile with (a) by an alpha (&#x3b1;) parameter wherein 1.9&#x2266;&#x3b1;&#x2266;2.2, and (b) a deviation from the alpha profile in at least one region of the core, such that the difference in the refractive index delta of the core from that determined by the core alpha value, at the radius Ris less than 0.001, and (ii) a cladding surrounding and in contact with the core, wherein the fiber has an bandwidth greater than 5000 MHz-km at a wavelength &#x3bb; where &#x3bb;&#x2267;800 nm.

Multimode optical fiber and systems comprising such fiber

A single mode optical waveguide fiber having a relatively large effective area and a low dispersion slope has a segmented core having a central segment, a first annular segment, and a second annular segment. Each segment has a relative refractive index percent, and an inner and outer radius. The relative refractive index percent and the radii of each core segment are chosen from the following ranges: the relative index of the central segment within the range of about 0.53% to about 0.9%; the relative index of the first annular segment within the range of about &minus;0.2% to about 0.15%; the relative index of the second annular segment within the range of about 0.1% to about 0.4%; the outer radius of the central segment within the range of about 3.1 &mgr;m and about 5.0 &mgr;m; and the center radius of the third annular segment within the range of about 6.18 &mgr;m and about 7.7 &mgr;m.

Optical fiber with large effective area, low dispersion and low dispersion slope

A protection switch for use in a two-fiber optical channel shared protection ring is disclosed. It includes an electrical switching circuit coupled to an optical signal monitor. The electrical switching circuit includes modular switching fabrics that respond to fault condition alarms provided by the optical signal monitor. Each modular switching fabric is versatile in that it includes a ring switch mode responsive to the multi-wavelength channel failures, and a span switch mode responsive to the single wavelength channel failures. Because the switching fabric of the electrical switching circuit is comprised of the plurality of small modular switching fabrics, the possibility of incurring a single-point switching failure in the switching fabric is virtually eliminated. Further, each modular switching fabric can be easily replaced in the event of failure, without affecting the operation of other switch fabrics within the protection switch.

Growing community of inventors

Horseheads, NY, United States of America

Ming Jun Li