US 12,345,966 B2
Laser output limiting device
Matthias Eble, Baldham (DE); Michael Weise, Berlin (DE); and Stefan Seeger, Berlin (DE)
Assigned to GECKO ANALYSENTECHNIK GmbH, Grasbrunn (DK)
Appl. No. 17/909,339
Filed by Gecko Analysentechnik GmbH, Grasbrunn (DE)
PCT Filed Mar. 20, 2020, PCT No. PCT/EP2020/057769
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/185453, PCT Pub. Date Sep. 23, 2021.
Prior Publication US 2023/0086020 A1, Mar. 23, 2023
Int. Cl. G02F 1/01 (2006.01); G01J 3/02 (2006.01); G01J 3/10 (2006.01); G01J 3/42 (2006.01); G02B 1/11 (2015.01); G02F 1/19 (2019.01)
CPC G02F 1/0147 (2013.01) [G01J 3/021 (2013.01); G01J 3/108 (2013.01); G01J 3/42 (2013.01); G02B 1/11 (2013.01); G02F 1/19 (2013.01); G02F 2203/52 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A laser output limiting device comprising
a reflecting device arranged in an optical path of a laser beam of a predefined wavelength,
a switching layer which comprises a material exhibiting a metal-insulator transition,
a reflecting layer which is positioned downstream of the switching layer (4) in the optical path of the laser beam, and
wherein the reflecting device is configured such that an output of the laser beam when it is incident upon the reflecting device which exceeds a predefined threshold causes a change in the refractive index of the material in the switching layer, and an output of the laser beam reflected by the reflecting device is thus reduced as compared to the output of the laser beam when it is incident upon the reflecting device due to reduced reflection by the reflecting device.