G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/255 (2006.01) G02B 6/18 (1990.01)
Patent
CA 2101036
An object of this invention is to provide a mode field diameter conversion optical fiber which can be processed in a short period of time to have a reduced mode field diameter at a desired portion thereof. The optical fiber according to this invention comprises a core of silica glass having a residual tensile stress, and a cladding surrounding the core and having a lower refractive index than that of the core. The desired portion is heated to relax the residual tensile stress in the core, whereby the optical fiber has a reduced mode field diameter at the desired portion.
Ishikawa Shinji
Kanamori Hiroo
Nakazato Koji
Nishimura Masayuki
Ohga Yuichi
Marks & Clerk
Sumitomo Electric Industries Ltd.
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