Agent
John A. Miller
Applicant
NORTHROP GRUMMAN SYSTEMS CORPORATION
Grantee
Northrop Grumman Systems Corporation
Primary examiner
Mustak Choudhury
Application number
15496937
Kind
B1
Document number
10396523
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Suppression of Polarization Modulation Instability in High Power Fiber Amplifier Systems

10396523 - 15496937 - USPTO

Application Apr 25, 2017 - Publication Aug 27, 2019

Gregory D. Goodno Joshua E. Rothenberg

Abstract

A fiber laser amplifier system that employs a technique for reducing polarization modulation instability (PMI) in a delivery fiber. The system includes a fiber amplifier that amplifies a seed beam and provides the amplified seed beam to a weakly polarization maintaining (PM) delivery fiber that delivers the amplified beam to a certain location. The polarization of the seed beam is controlled so that it aligns with the slow axis of the delivery fiber such that nonlinear birefringence that occurs in the delivery fiber is added to the natural birefringence of the delivery fiber so as to suppress the PMI in the delivery fiber.

Description

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