H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/18 (2006.01) H01S 3/10 (2006.01) H01S 3/23 (2006.01)
Patent
CA 2085856
An optical beam amplification and delivery system and method employs a central station (2) with a laser oscilla- tor (8), a laser amplifier (24) and a phase conjugate mir- ror (PCM) (26). Low power, near diffraction limited laser beams are delivered to each of a plurality of local sta- tions (4) through single-mode polarization preserving fi- bers (12). From the local stations (4) the low power beams are transmitted back to the central station (2) through high power multi-mode optical fibers (18). At the central station (2) the received beams are amplified, phase conju- gated and transmitted back through the amplifier (24) and multi-mode fibers (18) to their respective local stations (4). Distortions imposed upon the beams by the multi-mode fibers (18) during transmission back to the central station (2), and by the amplifier (24), are compensated during the return path, providing high power yet near diffraction lim- ited beam quality at the local stations (4). Attenuation through stimulated Brillouin scattering (SBS) is inhibited by selecting an appropriate aggregate diameter for the mul- ti-mode fibers (18).
ystème et méthode de distribution et d'amplification de faisceaux optiques, utilisant une station centrale (2) avec un oscillateur laser (8), un amplificateur laser (24) et un miroir à conjugaison de phase (MCP) (26). Des faisceaux laser diffractionnels quasi-idéaux de faible puissance sont distribués à un certain nombre de stations locales (4) au moyen de fibres monomodes préservant la polarisation (12). Aux stations locales (4), les faisceaux à faible puissance sont retransmis à la station centrale (2) au moyen de fibres optiques multimodes à grande puissance (18). ~ la station centrale (2), les faisceaux reçus sont amplifiés, conjugués en phase et retransmis à l'aide de l'amplificateur (24) et des fibres multimodes (18) à leurs stations locales respectives (4). Les distorsions imposées aux faisceaux par les fibres multimodes (18) pendant la retransmission à la station centrale (2), et par l'amplificateur (24), sont compensées pendant le trajet de retour, ce qui assure aux stations locales (4) un faisceau de grande puissance bien que de qualité diffractionnelle quasi-idéale. Le diamètre global choisi pour les fibres multimodes (18) inhibe l'atténuation par diffusion Brillouin stimulée (DBS).
Bartelt John L,
Rockwell David A.
Hughes Electronics Corporation
Sim & Mcburney
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