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1. WO2020003141 - THERMO-OPTIC LASER BEAM SHAPING WITH DOPED OPTICAL MATERIALS

Publication Number WO/2020/003141
Publication Date 02.01.2020
International Application No. PCT/IB2019/055372
International Filing Date 26.06.2019
IPC
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01
for the control of the intensity, phase, polarisation or colour
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
29
for the control of the position or the direction of light beams, i.e. deflection
G02F 1/01 (2006.01)
G02F 1/29 (2006.01)
CPC
G02F 1/0126
G02F 1/0147
G02F 1/293
Applicants
  • CSIR [ZA/ZA]; CSIR Campus, Meiring Naude Road, 0184 Brummeria, ZA
  • AEROSUD INNOVATION CENTRE (PTY) LTD [ZA/ZA]; 520 van Ryneveld Avenue, Pierre van Ryneveld 0045 CENTURION, ZA
Inventors
  • STRAUSS, Hencharl; ZA
  • NAIDOO, Darryl; ZA
Agents
  • DAVIES, James, Hasely; ZA
Priority Data
2018/0430827.06.2018ZA
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) THERMO-OPTIC LASER BEAM SHAPING WITH DOPED OPTICAL MATERIALS
(FR) MISE EN FORME DE FAISCEAU LASER THERMO-OPTIQUE AVEC DES MATÉRIAUX OPTIQUES DOPÉS
Abstract
(EN)
A laser beam shaping system includes at least one doped medium which is doped with a dopant and which is optically transparent at the first wavelength range and a beam input or coupling configured to generate or receive a shaped beam that is required to be shaped, the shaped beam being at a first wavelength range and directed towards the doped medium. The system includes an absorbed beam input or coupling configured to generate or receive at least one absorbed beam at a second wavelength range which is different from the first wavelength range and which is directed towards the doped medium. The doped medium has a higher beam absorption characteristic at the second wavelength range than at the first wavelength range, causing the absorbed beam to have a higher absorption than the shaped beam in the doped medium. The doped medium has a coating which allows high transmission of both the first and the second wavelength ranges.
(FR)
Système de mise en forme de faisceau laser comprenant au moins un milieu dopé qui est dopé avec un dopant et qui est optiquement transparent dans la première plage de longueurs d'onde et une entrée ou un couplage de faisceau conçu pour générer ou recevoir un faisceau mis en forme qui doit être mis en forme, le faisceau mis en forme étant à une première plage de longueurs d'onde et dirigé vers le milieu dopé. Le système comprend une entrée ou un couplage de faisceau absorbé conçu pour générer ou recevoir au moins un faisceau absorbé à une seconde plage de longueurs d'onde qui est différente de la première plage de longueurs d'onde et qui est dirigé vers le milieu dopé. Le milieu dopé présente une caractéristique d'absorption de faisceau plus élevée à la seconde plage de longueurs d'onde qu'à la première plage de longueurs d'onde, amenant le faisceau absorbé à avoir une absorption plus élevée que le faisceau mis en forme dans le milieu dopé. Le milieu dopé a un revêtement qui permet une transmission élevée à la fois des première et seconde plages de longueurs d'onde.
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