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1 June 1970 Light Focussing Glass Fiber And Rod
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A piece of glass fiber or rod with a radially parabolic vaiation of refractive index, named SELFOC(.4), has been prepared by exchanging thallium ions for potassium ions. As a light guide for optical communication use, SELFOC(.4)fiber has many advantages over reported ones from the view-point of flexibility, distortion of optical pulse, economical production, etc. The mode pattern of a laser beam was scarcely deformed after passing through a SELFOC()fiber, curved in a radius of curvature 10 cm, of one meter in length and 0.25 mm in diameter. SELFOC(g)fiber was used as connectors in an experimental optical com-munication system. 11-0 Attenuation in SELFOC '-- fiber has been decreased to a value 80 - 250 dB/km at 0.63A and will be still improved. Then, long SELFOCQV cables may be utilized for a long distance transmission line. A cylindrical rod of SELFOC() has the same optical performance as that of a single or sequence of optical lens. Although its resolving power under white light illumination is still poor, a short SELFOC () lens and a SELFOCTO fiber of 10 cm in length can be applied to medical endoscopes. Further, a conical 814.1,110C(,) was used to guide a 1aser beam on the small surface of an avalanche photo-diode. SELFOC( will be widely utilized in optical communication, optic, ,1 data processing, optical instruments and opto-electronic devices.
© (1970) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. Kita and T. Uchida "Light Focussing Glass Fiber And Rod", Proc. SPIE 0021, Fiber Optics II: Applications and Technology, (1 June 1970);

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