JPS58111010A - Positioning device - Google Patents

Abstract

PURPOSE:To set a device which moves in the directions of the axes (x), (y), and (z) while clamping an optical fiber arranged as opposed to a light emitting element at an optimum accurate position by making a scan in such a direction that an optical fiber output is maximum. CONSTITUTION:The light emitting chip 2 of the light emitting element 1 fitted to a fixed base 3 and a photodetecting element 8 are arranged on the same perpendicular previously. While an arm 64 positioned atop of the moving device 6 clamps the fiber element 4, a driving circuit 7 is driven by the indication of a controller 10 to turn on the element 1. Light from the chip 2 is sent to the input terminal of the optical fiber 5 and the light transmitted by the fiber 5 is photodetected by the photodetecting element 8. The quantity of light of the element 8 is supplied to a detecting circuit 9, whose detection result is supplied to the control circuit 10 to calculate an optimum scanning direction. The circuit 10 controls the device 6 to fix the elements 1 and 4 at an optimum coupling position with transparent resin.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technique of the Invention The present invention relates to an alignment device for aligning a light emitting element and an optical fiber at optimal positions for use in optical communication.

(2) Background light on technology II! The reliable optical fiber is the light source Lll! :D
(Phyto-emitting diode) is used in combination with a semiconductor light emitting device such as a semiconductor laser.

In this case, it is desirable to send as much light from the light emitting element as possible into the optical fiber. Incidentally, the relative positioning of the light emitting element and the input end of the optical fiber requires a very high product term (in μm), but conventionally this relative positioning operation v!
! Because this is done manually, it is difficult to achieve optimal positioning even though the positioning work requires a large number of man-hours, so there is a demand for an optimal positioning device that uses automatic control.

(8) Prior art and problems Conventional alignment devices use a light emitting element as a light source, and the light from the light emitting element is transmitted to the input end of an optical fiber, and the output light from the output end of the optical fiber is transmitted. This is done by making a manual moving table and adjusting the position by trial and error while adjusting the amount of light received by the light receiving element by WMgL.

However, this manual positioning work is complicated and takes a long time, and requires concentration, which has the disadvantage of being tiring and having a poor degree of connection.

(4) Purpose of the Invention In view of the drawbacks of the prior art, the present invention is an alignment device that detects the amount of light received by a light receiving element, has a scanning direction determination function based on the detected light output, and operates a movable table using a control circuit. The main purpose is to provide the following.

(6) Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a positioning device for arranging a light emitting element and an optical fiber to face each other and positioning each other at optimal positions, the device comprising: x, y
, a moving device movable in the z-axis direction, a drive circuit for lighting the light emitting element, a light receiving element for receiving the optical output of the 1ItI optical fiber, and a scanning direction determining means for optimizing the optical output. achieved by.

(6) Invention! l! Embodiments Hereinafter, embodiments of the alignment device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of an embodiment of the present invention, in which l is a fiber element having an optical fiber 5 in a light-emitting core equipped with a light-emitting chip 2, and 6 is a rotating table 61 and a plurality of arms 62. - 64, a driving circuit 7 for lighting the light emitting cord 1; 8 a light receiving element for receiving the light output from the optical fiber 5; 9 a control circuit for detecting the light receiving lid of the light receiving cord 8; A detection circuit 10 inputs the results manually, and the control circuit 10 scan-controls the moving device in an optimal direction based on the input from the detection circuit 9.

The light emitting chip 2 of the light emitting cable 1 attached to the fixed base 8 and the light receiving element 8 are arranged three pupils in advance on the same perpendicular line. Then, the fiber filtration device 4 is attached to the arm 64 located at the tip of the moving device 6.
When the drive circuit 7 is driven in accordance with an instruction from the control circuit 10 to light up the light emitting element 1, the light emitting element 1 is
The light from the zero light emitting chip 2 is sent to the input end of the optical fiber 6. The sent light is transmitted through the optical fiber 5 and exits from the output end, and the light receiving element 8 receives the emitted light. Then, detect this amount of light received '#lr9
When the detection result is input to the control circuit 10, the optimum scanning direction is calculated by the control circuit W&10-, and the moving device 6 is controlled according to the optimum scanning direction to move the light emitting element l at the optimum coupling position. and the fiber element passage are fixed with tn, 11 resin (not shown).

Note that a drive source (not shown), such as a motor, is attached to the connecting portions of the rotary table 61 and the arms 62, 68, and 64 of the moving device 6, respectively, and the drive source is controlled by the control circuit 10.

Figure 2 shows the light emission pattern from the light emitting chip 2, which passes through an arbitrary point 21 on the Z axis (Xl-Yl).
The two-dimensional distribution of light intensity P on a plane is shown in Figures 8 and 41! It is shown in ll. In Fig. 8, the initial position (XI,
As shown in Fig. 4, in order to find the direction of increasing light movement, the optical output at K (yl, Zl) is taken as PI. demand.

In FIG. 4, the negative direction of xls is the increasing direction, so if we move in the increasing direction K11l and find the X1 point corresponding to the Pg point that has the same output as the output P1 corresponding to 71. The peak position of Zl) is
It is sufficient to calculate 1-3μ by 1, and the peak position moves by (Y, yt, zl) to determine the position of the pole [P8] in the Xi axis direction. Similarly, Yl axis direction, Z
If a similar search is performed in the l-axis direction, it becomes possible to search for a three-dimensional peak value, and the case of the zl-axis is shown in FIG.

(7) Effect of @Akira As is clear from the above explanation, according to the alignment device of the present invention, the number of man-hours for alignment work is greatly reduced compared to the conventional manual work, and at the same time, it is possible to achieve accurate optimal positioning. Since it can be assembled easily, an improvement in coupling efficiency can be expected, and it is extremely advantageous to use it in an 8m optical communication device.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram for explaining one embodiment of the alignment device according to the present invention, and FIGS. 2 to 6 are diagrams for explaining the intensity distribution of light. In the figure, 1 is a light emitting element and 2 is a light emitting chip. 8 is a fixed base, 4 is a fiber element, and 5 is an optical fiber. 6 is a moving device, 7 is a drive circuit, 8 is a light receiving element, 9 is a detection circuit, 10 is a control circuit, 61 is a rotary table, 62 is an arm A
, 68 indicates arm B, and 64 indicates arm C1. Figure 1 Figure 2 Figure 3yJ 4121 Figure 5

Claims (1)

[Scope of Claim] A positioning device for arranging a light emitting element and an optical fiber to face each other and positioning them at optimal positions. a moving device that can hold the optical fiber and move it in the Z-axis direction; a drive circuit that lights up the W13 light emitting element; a light receiving element that receives the optical output of the optical fiber; A positioning device characterized by comprising a scanning direction determining means.