1988-07-08
1990-01-16
Sikes, William L.
350 9630, G02B 610
Patent
active
048938963
ABSTRACT:
The present invention relates to an energy transmission optical fiber which is a medium for transmitting high-energy beams within an ultraviolet range such as laser beams. Since an optical fiber according to the present invention comprises a core formed of pure silica and a clad having a graded index type distribution of refractive index and said clad is disposed on an interface between the core and the clad where many structural defects are generated, the transmission loss is not increased even after the transmission of high-energy beams for a long time. In addition, since the optical fiber according to the present invention comprises the core formed of pure silica having a high melting point, the high-energy beams can be transmitted without generating a melting fracture in the core.
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patent: 4025156 (1977-05-01), Gloge et al.
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patent: 4392715 (1983-07-01), Bonewitz et al.
patent: 4435040 (1984-03-01), Cohen et al.
patent: 4690500 (1987-09-01), Hayami et al.
patent: 4733939 (1988-03-01), Utsumi et al.
Gozen Toshikazu
Satake Takeshi
Suzuki Toshiya
Tanaka Hiroyuki
Utsumi Atsushi
Mitsubishi Cable Industries Ltd.
Sikes William L.
Ullah Akm E.
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