SU1645867A1 - Device to rewind optical fiber - Google Patents

Abstract

The invention relates to equipment of the cable industry, is intended to detect mechanical defects of optical fiber and allows to increase the accuracy of defect detection and their dynamic evaluation. An optical probe pulse will be generated in the optical window 7. At the output of the optical fiber, the amplitude of the optical radiation is measured. Scattered non-uniform x and defects optical radiation is received by the first receiver. Transmitting optical node 8 is locked at the sending node 1, and receiving optical QIR, step 9, at the receiving node 2. When rewinding, anapysis of defects is performed throughout the entire game for additional ich p & and tensile stresses in the test narrower. Zin 3 (L el 00 o sl

Description

Fig 1

The invention relates to equipment of the cable industry, is intended to detect mechanical defects of the shell and core defects of an optical fiber, as well as to determine the refractive index and the optical losses introduced along its entire length, and can be used at the input control 0V before they are embedded in optical cables during its production,

The purpose of the invention is to improve the accuracy of detection of defects and gs. dynamic evaluation.

Figure 1 shows a block diagram of the proposed device; in fig. 2 is a block diagram of a transmitting optical node; in fig. - go receiving optical node.

The device contains giving 1 and receiving 2 nodes, test node 3, compensator 4, sensor 5 mechanical break, length counter 6, optical fiber 7, transmitting optical node 8, receiving node 9, analysis unit 10, display 11.

The transmitting optical node 8 contains an optical connector 12, a directional optical coupler 13, a laser transmitter 14, an avalanche photodetector 15, an amplifier 16, a movable electric connector 17, a receiving optical node a 9 contains an optical connector 16, a photodetector 19, an amplifier 20, a movable electric connector 21 I, the transmitting node 1 secures the transmitting optical node 8 and houses the optical fiber 7, which is connected to the input of the transmitting optical fragile. The optical fiber is filled through the compensator, test unit 3, mechanical break sensor 3, length CMW 6 at the receiving node 2 and optically connected to the receiving optical equipment 9 attached to the receiving v gts 2. The sounding optical pulse of the tire perrd . a hick 14 is introduced and an optical fiber. The optical signal backscattered on inhomogeneous structures and defects is received by the first optical receiver 1J A pre-brilliant optical signal of the optical signal from the output of the receiver 15 cherc or both 6 and popgg.gmi electric connect 1 / II.JCTV - pastes on n plok 10 anatnch. Ohm

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The solenoid probe pulse from the output of the optical fiber 7 is fed to the input of the receiving optical node 9 and, having passed through the optical connector 18, is fed to the second receiver FD-19. After conversion to the electrical signal from the output of the photodegenera 19 signal through the amplifier 20, the movable electric connector 21 is fed to the input of the analysis unit 10. The computing device on the display screen 11 forms a graphic image of the pulsed optical response in the following coordinates: vertical - optical power on a logarithmic scale, horizontally - the time reduced by the scale of time.

After the pre-measurement procedure, the optical fiber is filled into the test unit 3, which causes a decrease in the optical modulus of the probing element at the output of the optical signal. The bends of the optical fiber in the test unit 3 are identified on a graphical-with a com-display of display 11, which allows them to be automatically automated. The output signal, g, of the mechanical distance counter, is followed by the conversion of the fourth input of the 10-unit unit. Block 10 compares the mechanical counter reading of the optical distance traveled by the distance obtained using the optical probe pulse to the podvitelnogo node, which allows you to record the change in group velocity of the optical signal, and hence the refractive index 0V along its entire length. The signal from the sensor 5 mechanical breakage is supplied to the third input of the tank 10 zchliz and stops the operation of the entire device.

Claims (1)

An analysis of the recorded all the characteristic features of the graphic image of defects allows a conclusion to be made about the growth of the defect after fiber rewinding. Invention Formula A device for rewinding optical fiber Koio, containing giving and receiving signals, test accounting, compensator, mechanical breakage sensor and length counter, about aphids in order to improve the accuracy of defect detection and their dynamic evaluation, a transmitting optical node including optical emitter, a radiation input unit in an optical fiber, a directional coupler, a first optical receiver, and a receiving optical node, output output unit are inserted into it radiation from optical wave7 the second optical receiver and the analysis unit, the transmitting optical node is fixed on the separating node, and the receiving unit - on the receiving one; the outputs of the optical receivers of the mechanical break sensor and the Danah counter are connected to the analysis unit, the output of which is connected to the recorder and transmitting optical node. GT FM.2