SU1545186A1 - Device for mating fibre light-guide with radiator - Google Patents

Abstract

The invention relates to fiber optics elements and can be used to connect an optical transmission line with an active or passive optoelectric node. The purpose of the invention is to improve the accuracy of the adjustment. The device contains a base 1, in which the emitter 2 and the fixing lens 3 are placed. The mating surfaces of the sliders 5 - 7 are located at an angle of 60 ° relative to each other. The connecting rod 8 is mounted on the fiber light guide 9. In the sliders and the bottom of the glass 4, threaded holes with different steps are coaxially made. The adjustment is made by rotating the differential adjustment screws 10-12, installed in the corresponding holes of the sliders and glass. As each of the differential screws rotates, the corresponding slider moves in the longitudinal guide cup 4. The connecting rod 8 rotates relative to the contact points with the mating surfaces of the sliders. When all three differential screws 10 - 12 are simultaneously rotated in one direction, the end of the optical fiber is displaced in the axial direction of the device without turning the connecting rod 8. 2 Il.

Description

The invention relates to fiber optics elements and can be used to connect an optical transmission line with an active or passive optoelectric node.

The purpose of the invention is to improve the accuracy of the adjustment.

FIG. 1 shows the device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The device comprises a base 1 in which an emitter 2 and a focusing lens 3 are placed. A housing 4, made in the form of a glass with a central hole in its bottom, is docked to the end surface of the base 1. The housing 4 has three longitudinal guides arranged, for example at an angle of 120 ° relative to the axis of the housing, in which three sliders 5-7 are located, mating with a common connecting rod 8 . Case 4 is mounted on base 1. Rod 8 is mounted on optical fiber 9 with a protective sheath, with the end of the optical fiber 9 (point O is brought to the end plane of the connecting rod 8 facing radiator 2 and grinded together with this end surface. In each the slider 5-7 is threaded in increments a and coaxial to it in the bottom of the glass — threaded holes with a step of the thread. The position fixture consists of three differential screws 10–12 installed in the corresponding threaded holes.

The process of adjusting the precise end of the fiber end

0

0

35

five

about .

55

9 into the focus of the lens 3 with the radiator 2 is produced by rotating the differential screws 10-12. When each of them rotates, for example screw 10, the corresponding slide 5 moves in the longitudinal guide body 4 by the value M defined by the formula

ul-n- -Sa),

where S and S, Ј are the thread pitch of the corresponding holes; n - the number of revolutions of the differential screw. As a result, the crank 8 rotates relative to the points of contact with two other sliders 6 and 7, displacing the fiber end (fo4Ky 0) perpendicular to the device axis along the bisector between two fixed sliders 6 and 7 by the value of ic defined by the formula

h "n - () AC R O-c5s 60 °)

where R is the horizontal distance from

point of contact of the slide 5 with the connecting rod 8 to the axis of the connecting rod; h is the vertical distance from the point of contact of the slider 5 to the end of the optical fiber (point 0). Rotating alternately adjusting screws 10-12, respectively, displace the end of the optical fiber (point 0), in a plane perpendicular to the axis of the device. The adjustment results are indicated on the maximum transmitted power from the radiator via the fiber-optic communication line.

With simultaneous rotation of all three differential screws 10-12 in one direction (for example, one

each turn) the end of the fiber (point 0) is displaced in the axial direction of the device without turning the connecting rod 8 (with a specified pitch). Thus, the axial position of the end of the optical fiber along the axis of the device is adjusted, working out the error of the focal position of the distance of the lens.

Claims (1)

Invention Formula A device for joining an optical fiber with an emitter, comprising a base, a focusing lens fixed to it with an emitter, a housing with a fiber light guide placed in its cavity, the end of which is mounted coaxially with the focusing lens, and the position fixator, with i J5 20 451866 This is fixed to the surface of the optical fiber by a connecting rod, characterized in that, in order to improve the accuracy of the alignment, it is equipped with three sliders mounted in longitudinal guides made on the inner surface of the housing, while the housing is made in the form of a J with a central hole in the bottom which is placed on the base, and the three sliders are coupled to the connecting rod, and the mating surfaces the sliders are angled 60 relative to each other, and the position fixture consists of three differential screws placed in longitudinal threaded holes made coaxially in the sliders and the bottom of the glass and having different thread pitch. P g