Infrared optical fiber, a method of manufacturing the same, and

Details Infrared optical fiber, a method of manufacturing the same, and Infrared optical fiber, a method of manufacturing the same, and

1990-08-16

1991-12-31

Lee, John D.

Optical waveguides

Optical transmission cable

Loose tube type

385123, 385142, G02B 616

Patent

active

050766538

ABSTRACT:
An infrared optical fiber is disclosed which has a composition ratio of silver chloride and silver bromide in the range of 30 to 70 percent by weight of silver chloride, and has a diameter of 0.5 mm or less. The infrared optical fiber has great mechanical strength, so that it does not burn because of degradation in the laser beam transmission capability, even after 2,000 times of repetitive bending with a curvature radius of 20 mm, which is the condition necessary for use within the interior of a body, and it exhibits excellent radiant optical characteristics. In particular, an infrared optical fiber with a diameter of 0.35 mm or less is preferred, because such an infrared optical fiber withstands over 10,000 times of repetitive bending under the same condition as above and can therefore be repeatedly used many times. Also, by applying an appropriate load to the infrared optical fiber, the infrared optical fiber, which is of straight shape free from curving and which has excellent radiant optical characteristics, can be produced stably with a short manufacturing period of time. Furthermore, an optical fiber cable using such an infrared optical fiber, in which the infrared optical fiber is housed in a protective tube containing a dry inert gas, can be repeatedly used under wet conditions of high humidity and can be stored under ambient conditions for a long period of time.

REFERENCES:
patent: 4504298 (1985-03-01), Yokota et al.
patent: 4521073 (1985-06-01), Murakami et al.
patent: 4583821 (1986-04-01), Murakami et al.
patent: 4955689 (1990-09-01), Fuller et al.
A. Sa'ar et al., "Optical and Mechanical Properties of Silver Halide Fibers", Proceedings of SPIE-The International Society for Optical Engineering, vol. 843, Aug. 20-21, 1987.

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