Fitel USA Corporation

Lucent Technologies Inc.

Ofs Fitel, LLC

Furukawa Electric North America, Inc.

Stephan Wielandy

Benjamin John Eggleton

Siddharth Ramachandran

Paul Francis Wysocki

Andrew John Stentz

Clifford E Headley

Michael Fishteyn

Douglas P Holcomb

Tsing Hua Her

Abds-Sami Malik

Akheelesh Abeeluck

Described is an optical fiber system for delivering ultrashort pulses with minimal distortions due to nonlinearity. The system is based on delivering the optical pulses in a higher order mode (HOM) of a few-moded fiber. The fiber is designed so that the dispersion for the HOM is very large. This results in a dispersion length Lfor the delivery fiber that is exceptionally small, preferably less than the non-linear length L. Under these conditions the system may be designed so the optical pulses experience minimum non-linear impairment, and short pulse/high peak power levels are reproduced at the output of the delivery fiber.

Optical fiber systems for delivering short high power pulses

An improved tapered fiber bundle (TFB), or assembly including a TFB, mitigates undesirable reflections from optical discontinuities at the input ends of the multimode fibers of the TFB by suppressing the coupling of signal light into modes that can produce undesired reflections. Means are provided for managing the mode field of injected signal light so that it remains substantially confined to the core of the central TFB fiber until it is past the region where it can interact with the multimode fibers of the TFB.

Pumping arrangement for fiber amplifiers with reduced reflective feedback

An optical performance monitor particularly well-suited for use in dense wavelength-division multiplexed (DWDM) systems includes both a nonlinear optical detector and a conventional linear detector. The nonlinear optical detector, which may comprise a quadratic detector, is used to provide information, on a channel-by-channel basis, regarding chromatic dispersion, polarization mode dispersion and accumulated amplified spontaneous emission (ASE) noise in each signal wavelength.

Optical performance monitor utilizing nonlinear detection

A filled-core optical fiber and method where the optical fiber is collapsed at opposing ends subsequent to the active optical material being introduced into the hollow core region. The collapsing-functions to &ldquo;pinch off&rdquo; the active material (which may be a liquid or solid) within the fiber structure and also collapse the cladding layer ring surrounding the core into a solid core region on either side of the active material. The filled-core fiber is then sealed and can be coupled to standard fiber using conventional splicing processes.

Filled-core optical fiber and method of making the same

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Hillsborough, NJ, United States of America

Stephan Wielandy