Nec Laboratories America, Inc Patent Portfolio Statistics

Publication number: US20220187121A1
Application number: 17/548,581

Abstract:
Aspects of the present disclosure describe systems, methods and structures for coherent distributed sensing that employs a moving average method among locations along a sensing fiber employing a user configured number of taps that involves location grouping and a group's internal phase alignment followed by an inter-group phase alignment and combining. Our method employs two steps of rotation to achieve the alignment: intra-group rotation and inter-group rotation to align the phase of all participating sensing fiber locations.

Publication date: 2022-06-16
Applicant: Nec Laboratories America, Inc.
Inventors: Ezra Ip

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Publication number: US20220182170A1
Application number: 17/543,616

Abstract:
Aspects of the present disclosure describe systems, methods. and structures directed to an integrated 3-way branching unit switch module suitable for undersea application.

Publication date: 2022-06-09
Applicant: Nec Laboratories America, Inc.
Inventors: Fatih Yaman

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Publication number: US20220173808A1
Application number: 17/540,132

Abstract:
Aspects of the present disclosure describe systems, methods. and structures in which guided acoustic Brillouin (GAWBS) noise is measured using a homodyne measurement technique and demonstrated using a number of optical fibers, such fibers being commonly used in contemporary optical communications systems. The measurements are made with single spans and determined to be consistent with separate multi-span long-distance measurements. Additionally, a technique for preparing an optical fiber exhibiting superior GAWBS noise characteristics by reducing coherence length of the optical fiber by spinning the fiber at a high rate during the drawing process such that birefringence coherence length is reduced.

Publication date: 2022-06-02
Applicant: Nec Laboratories America, Inc.
Inventors: Inoue Takanori

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