G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/036 (2006.01) C03B 37/012 (2006.01) C03B 37/014 (2006.01) C03C 13/04 (2006.01) G02B 6/04 (2006.01) H01S 3/067 (2006.01) H04B 10/17 (2006.01) H01S 3/07 (2006.01)
Patent
CA 2178287
A rare earth element-doped multiple-core optical fiber has an outer cladding layer and a plurality of cores each covered with a primary cladding layer. The cores are positioned substantially on a central axis of the outer cladding layer and separated with a predetermined spacing S from each other by the primary cladding layer. The outer cladding layer is made of SiO2, or SiO2 to which a dopant like F, Ge, etc. is added. The primary cladding layer is made of SiO2 doped with Er, or SiO2 doped with Er and F together and formed to have a predetermined thickness of 1.0µm - 1.5µm to form the predetermined spacing S. The soot glass rods for cores and primary cladding layers are immersed in an Er-compound solution, then picked up, dried and consolidated to form Er-Al co-doped SiO2 - GeO2 transparent glass rods. The glass rods are inserted into a quartz tube and collapsed by heat to fabricate an optical fiber preform rod, then heated to be drawn to provide an Er-doped multiple-core optical fiber.
Abe Jun
Imoto Katsuyuki
Koya Kazuo
Abe Jun
G. Ronald Bell & Associates
Hitachi Cable Ltd.
Imoto Katsuyuki
Koya Kazuo
LandOfFree
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