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Title: Stable, narrow spectral linewidth, fiber-delivered laser source for spin exchange optical pumping

Patent ·
OSTI ID:1493611

Disclosed herein are example embodiments for providing high power, narrow linewidth, high-stability laser sources. Particular embodiments are adapted for use in spin exchange optical pumping (SEOP). One example system comprises an array of laser diodes; a beam twister positioned to receive individual beamlets from the array of laser diodes, the beam twister being configured to rotate the individual beamlets from the array of laser diodes and produce rotated beamlets; one or more collimating lenses positioned to receive the rotated beamlets produced by the beam twister and produce substantially collimated beamlets having a divergence angle; a spectral-line-width-reducing element positioned to receive the substantially collimated beamlets from the one or more collimating lenses and produce spectral-line-width-reduced beamlets; an optical fiber; and one or more focusing lenses positioned between the optical fiber and the spectral-line-width-reducing element and configured to receive the spectral-line-width-reduced beamlets and focus them into the optical fiber.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-000R22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
10,126,558
Application Number:
14/992,649
OSTI ID:
1493611
Resource Relation:
Patent File Date: 2016 Jan 11
Country of Publication:
United States
Language:
English

References (6)

Polarized 3He Neutron Spin Filters at Oak Ridge National Laboratory journal January 2013
Development of stable, narrow spectral line-width, fiber delivered laser source for spin exchange optical pumping journal January 2015
Spectral linewidth narrowing and tunable two-color laser operation of two diode laser arrays journal January 2012
Energy Transport in High-Density Spin-Exchange Optical Pumping Cells journal April 2001
Breakdown of Angular Momentum Selection Rules in High Pressure Optical Pumping Experiments journal August 2010
In situ polarized 3 He system for the Magnetism Reflectometer at the Spallation Neutron Source journal July 2012

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