Coherent, flexible, coated-bore hollow-fiber waveguide, and...

G - Physics – 02 – B

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G02B 6/00 (2006.01) G02B 6/032 (2006.01) G02B 6/10 (2006.01)

Patent

CA 2180828

A rugged flexible hollow-fiber waveguide (1) that permits preservation of good transverse spatial coherence of input infrared laser radiation and that transmits substantial power of such radiation, with low attenuation. The present invention preferably comprises a small- diameter thin-wall silica-glass tube (3); a protective coating (2) on the outer surface of the tube; a sufficient reflective layer (4) on the inner surface of the tube (3); and a thickness, optimal for the wavelength(s) of interest, of dielectric on the exposed surface of the reflective layer (4). The fiber (1) is manufactured with processes that maintain the of the bore.

Un guide d'ondes (1) constitué d'une fibre creuse souple irrégulière permet de préserver une bonne cohérence spatiale transversale des rayonnements laser infrarouge et transmet avec une faible atténuation l'essentiel de l'énergie. La présente invention se compose de préférence d'un tube (3) de verre de silice à paroi mince et de petit diamètre; d'un revêtement de protection (2) sur la surface externe du tube; d'une couche réfléchissante suffisante (4) sur la surface interne du tube (3); et à une épaisseur de diélectrique optimale par rapport aux longueurs d'ondes intéressantes, le diélectrique étant situé sur la surface exposée de la couche réfléchissante (4). La fibre (1) est fabriquée selon un procédé qui préserve la régularité du canal.

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