US 11,754,866 B2
Gas cooled faraday rotator and method
Andrew J. Bayramian, Manteca, CA (US); Alvin C. Erlandson, Livermore, CA (US); and Daniel C. Mason, Livermore, CA (US)
Assigned to Lawrence Livermore National Security, LLC, Livermore, CA (US)
Appl. No. 16/641,977
Filed by Lawrence Livermore National Security, LLC, Livermore, CA (US)
PCT Filed Aug. 27, 2018, PCT No. PCT/US2018/048185
§ 371(c)(1), (2) Date Feb. 25, 2020,
PCT Pub. No. WO2019/046212, PCT Pub. Date Mar. 7, 2019.
Claims priority of provisional application 62/551,205, filed on Aug. 28, 2017.
Prior Publication US 2020/0218100 A1, Jul. 9, 2020
Int. Cl. G02F 1/00 (2006.01); G02F 1/09 (2006.01); G02F 1/01 (2006.01)
CPC G02F 1/09 (2013.01) [G02F 1/0136 (2013.01); G02F 2203/21 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
at least one Faraday optic having opposing optical faces through which there is a beam propagation axis that is orthogonal to said opposing optical faces;
means for heating a portion of said at least one Faraday optic;
a gas cooling system configured to provide gas to cool each face of said opposing faces; and
a magnetic field source configured to induce a desired Faraday rotation of a laser beam propagating on said beam propagation axis through said at least one Faraday optic.