Manufacture method of optical fiber coupling connector and method for measuring surface roughness of blind hole of fiber coupling connector

Abstract

The invention discloses a manufacture method of an optical fiber coupling connector, which comprises the following steps of: providing a die for forming the optical fiber coupling connector provided with a plane optical surface or curve optical surface; forming a first optical fiber coupling connector provided with the plane optical surface by using the die; measuring bottom surface roughness of a blind hole on the first optical fiber coupling connector from one side of the plane optical surface of the first optical fiber coupling connector by using a non-contact type optical measurement apparatus; correcting the die according to a measurement structure so that the die accords with the roughness requirement; and forming the optical fiber coupling connector with the curve optical surface by the corrected die and assembling an optical fiber in a shell. The invention also relates to a method for measuring the surface roughness of the blind of the optical fiber coupling connector.

Description

technical field [0001] The invention relates to a method for manufacturing an optical fiber coupling connector and a method for measuring the roughness of the bottom surface of a blind hole. Background technique [0002] As a new generation of transmission mode, optical fiber transmission has the characteristics of high bandwidth, low signal loss, and light weight. In order to give full play to the advantages of optical fiber transmission, it is necessary to keep the optical fiber with low light energy loss during the transmission process. At present, optical fiber coupling connectors are required in optical fiber transmission, and the optical energy loss caused by the optical fiber coupling connectors accounts for a large proportion of the total optical energy loss. [0003] The optical fiber coupling connector is generally provided with a blind hole and a lens, the blind hole is used to accommodate the optical fiber, and the lens is located at the bottom of the blind hole...

AI Technical Summary

Problems solved by technology

[0005] However, most of the blind holes used to accommodate optical fibers in optical fiber coupling connectors are thin and long. It is very difficult to measure the roughness of the bottom surface of the blind hole of the formed optical fiber coupling connector.

If the contact measurement method is used to directly measure the surface morphology of the bottom surface of the blind hole, due to the deep blind hole, it is likely to cause scratches on the bottom surface of the blind hole during the measurement process; if the non-contact measurement method is used for measurement, due to The non-contact measurement method uses scattered light intensity or interference ripple signal to obtain surface information. If the bottom surface of the blind hole is measured from the insertion end of the optical fiber, due to the relationship between the aperture and the depth of the blind hole, it will not be possible to use a high-magnification objective lens. Focusing, and most of the received interference signals are caused by the inner wall of the blind hole or other areas, and the reliability is not high. If the measurement is made from the lens end, the light-gathering effect of the lens will also have a great impact on the reliability of the measured value.

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