JPS595216A - Optical fiber connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (11) Technical Field of the Invention The present invention relates to an optical fiber connector that can be joined so that the amount of light transmission does not change due to changes in ambient temperature or changes in the applied strength of the connector.

(2) Conventional technology and problems When viewed from the side, the connector part of the conventional original fiber is
It was as shown in the figure. That is, a metal core 00T for alignment is provided at one end of the optical fiber OF to surround the fiber, and when the outer envelope serving as a tightening fitting is rotated, the core moves back and forth, thereby connecting the fibers. A tapered rubber GM is provided behind the core. When the fibers face each other, even though the cores are in contact with the eye, the cores are slightly retracted from the end face of the connector because they have a diameter of microns and are made of glass. Therefore, there is air between the cores, and when the connector is tightened or the ambient temperature changes, the core spacing changes and the amount of reflected light transmitted changes. Therefore, the amplitude at the transmission end changes, which returns to the laser diode and changes its characteristics.

11 OBJECTS OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and to provide an optical fiber connector that can be joined without changing the amount of light transmission due to changes in temperature or tightening of the connector.

1) Structure of the Invention The structure of the present invention to achieve the above-mentioned object is to provide an outlet for an oil-based material having a refractive index matching the optical fiber index provided in the central section of the original fiber.

(5) Embodiment of the invention FIG. 2 is a side sectional view showing an embodiment of the invention, in which the outflow hole HL is located at the end surface SF of the optical fiber connector core CT.
An oil tank OT is provided in the tapered rubber part GM, and a vibe pp is tied between it and the outlet. The oil tank OT has oil with the same refractive index value as the core of the optical fiber OF (oil-based material - index matching oil).
Therefore, inject by expanding the injection hole IH valve v1.

When oil is in the tank, press the rubber part GM with your finger to open the valve ■2.
opens and the oil flows toward the outlet HL. The valve v2 is configured to open only when the pressure inside the oil tank OT becomes high. The oil moves from the outlet HL toward the optical fiber along the end face 5FVC and fills the opposing portions of the core, so that the original fiber is completely blown continuously through the oil. The transmitted light does not change at the core-opposed portion as in the conventional case. When the oil between the cores decreases, the rubber G
Press M to push out the oil in the oil tank OT. At this time, it is preferable to use an oil whose main material is silicone because it is transparent and has no absorbent properties.

(6) Effects of the Invention In this way, according to the present invention, in the opposing optical fiber connectors, the spaces between the cores are filled with oil whose refractive index is equal to that of the fiber core, so that the cores appear to be continuous. Even if there is a change in temperature, external pressure, etc., the change in the amount of light transmission is extremely small, making it effective for information transmission, and since there is no change in reflected light, there is no adverse effect on the semiconductor light source.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional optical fiber connector, and FIG. 2 is a side sectional view of an embodiment of the present invention. OF...Optical fiber CT...Connector core CM...Rubber part OT...Oil tank HL...Outlet Vl, V2...Valve SF...Connector end face Patent applicant Fujitsu Limited Attorney: Eisuke Tsuchi Suzuki, Patent Attorney

Claims (1)

[Claims] 1. An optical fiber characterized in that an end face of an optical fiber connector in which an optical fiber is provided in the center is provided with an outlet for an oil-based material having a refractive index that matches the refractive index of the original fiber core.