JPS58158622A - Manufacture of optical coupling part - Google Patents

Abstract

PURPOSE:To improve precision and product yield, to facilitate operation, and to obtain excellent weld zones by interposing an upper and a lower body to be welded between an upper and a lower electrode, and then performing resistance welding after aligning their optical axes to each other while applying pressure. CONSTITUTION:Between the upper and lower electrodes 3 and 7, the upper and lower bodies 6 and 5 to be welded are interposed and a direct current is supplied from a DC power source 10 for light to turn on a light emitting diode. Its light output is monitored on a power meter 9 and at the same time, optical axis alignment is carried out by a micrometer 4 for X and Y axis alignment to find a maximum output. In this case, the optical axis alignment is carried out while a triffle pressure of 0.1-2.0kg/cm<3> is applied. The X and Y axis alignment micrometer 4 is locked completely to eliminate deviation in main welding and a welding current and forging pressure are applied to carry out the resistance welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an optical coupling section that receives and emits light.

There are two methods for aligning the optical axes and fixing the stem containing the light emitting diode (lower object to be welded) and the holder holding the optical fiber (upper object to be welded), one by soldering, and the other by soldering. One type of welding is by resistance welding. Mix the stem and holder using soldering method 1. After aligning the optical axis with a micro-adjustment device, the two horns are soldered, but the flux used is: cause damage to. -! , The axis may be misaligned due to the force when the raw material is cooled,
There are problems such as insufficient airtightness of the connecting part and long sealing time.On the other hand, with PROJIEC/YONOKI resistance welding, the airtightness of the connection part is perfect and the sealing time is short. Although there are advantages such as a short length, it is difficult to manage the amount of axis misalignment during welding,
It was difficult to secure the initial optical axis alignment accuracy.

Regarding the required performance of the optical coupling part, the closer the distance between the light emitting diode and the optical fiber, the better, and the best value is 0 μm for the amount of axis misalignment. In order to keep the coupling efficiency within 1 dB, it is necessary to keep the axis 1'' diameter within 15 μm. Conventionally, the accuracy of the outer diameter of the fiber itself and the accuracy of the light emitting diode mounting section 111 was 110 to 20 μm per fiber. The accuracy of the holder is 10 μm 1 so, and the accuracy of the inner and outer diameters is also 1
0 to 20 μm, and the accuracy of the workpiece and welding J-1
The optical axis alignment accuracy was dependent on the accuracy of , (Denkoki) +13. For this reason, there are problems with component costs and lower yields.

The present invention was made in view of the above situation, and an object of the present invention is to provide a method for manufacturing an optical coupling part that can improve alignment accuracy and product yield, facilitate work, and obtain a good welded part. It is something.

In the method for manufacturing an optical coupling part of the present invention, when manufacturing an optical coupling part by resistance welding, an upper workpiece and a lower workpiece are inserted between an upper electrode and a lower electrode, and the workpiece is attached to the workpiece with a 0. 1~
After applying a pressure of 2 kg/cd and causing a light emitting diode for optical axis alignment to emit light from outside and receiving the light through an optical fiber, monitoring the optical output with a power meter and aligning the optical axis via an XY axis alignment micrometer, This is a method of performing resistance welding.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for manufacturing an optical coupling portion of the present invention will be described below with reference to the drawings. In the figure, 1 is a light pressure adjustment valve, 2 is a -1 electrode air ring, 31 is an upper electrode, and 4 is an XY
Alignment micrometer, 5” is a two-part welded object (boulder)
, 6 is the part F to be welded (stem). 7 F part electrodes,
Reference numeral 8 designates a coat optical monitor receptacle, 9 a power meter, 10 a DC power source for optical use, and 11 a slide pin.

The part for welding the upper and lower objects to be welded 5.6 is composed of a two-part air cylinder 2, an upper electrode 3, and an F-part electrode 7. In addition, a light emitting diode (LED) for optical axis alignment on the lower workpiece 6 and a pin photodiode (PIN-
PD) As an optical axis alignment device between the two parts to be welded 5 and -, soft touch force adjustment valve 1, X Y 1
It consists of a micrometer 4, an optical monitor receptacle 8, a power meter 9, an optical DC power source 10, and a slide pin 1.

The work order is to insert part of the workpiece 6 and the upper workpiece 5 between the upper and lower electrodes 3 and 7, and then apply direct current (several volts) from the optical DC power supply 10 to the light emitting diode. Make it emit light. Then, while monitoring the optical output with power meter 9, combine XY411 with micrometer 4.
Align the optical axis with and find the maximum output. At this time, 0,
1-2. Very stable alignment can be achieved by aligning the optical axis while applying a slight pressure of OKg/ca. After the optical axis alignment is completed, the XXYXY axis alignment ichromator 4 is completely locked to minimize misalignment during actual welding. Next, resistance welding is performed by applying welding current and pressure. This completes the series of tasks.

The amount of axis misalignment between the light emitting diode and the optical fiber is 10 μm.
In order to keep the fit to a certain level, the fit of the slide 11 should be 10 μm.
You can rest assured that the upper electrode 3 and the upper workpiece 5 are securely fixed, and the pressure (100 to 200 ) must be provided with fixing means that can withstand The parallelism between the upper and lower electrodes 3.7 must also be 1/1.000 or less.

In the case of this example, a triangular cedar projec/yong is provided at the lower welding point, and only the projex/yon melts during welding to obtain a reliable welded part. If the axes do not align due to the difference in height, a more stable axis-aligned joint can be obtained by using a trapezoidal projector.

``This'': dl in the i9 samurai θmi of the optical coupling part of this embodiment, whereas conventionally, many were manufactured without an optical monitor and the best ones were selected from among them, whereas in the past, optical monitoring was carried out strictly and reliably. Since welding can be performed with the maximum value obtained, the product yield can be greatly increased. When performing resistance welding, the upper part of the welding jig can be moved in the X1YXZ directions, and the optical axis can be aligned while monitoring the light, improving accuracy and centering when bonding the light emitting diode onto the lower part to be welded. This allows for larger tolerances, making the work easier. In addition, when monitoring, it is possible to align the axis while applying axial pressure (noft tension), so that some unevenness of the projec- tion joint can be smoothed out and a good welded part can be obtained.

As described below, the method for manufacturing an optical coupling part of the present invention has the effect of improving alignment accuracy and product yield, making the work easier, and making it possible to obtain a good welded part. be.

[Brief explanation of the drawing]

The figure is a cross-sectional view of a part of an apparatus for carrying out the method of manufacturing an optical coupling part of the present invention. 3...1 partial electrode, 4...X Y 'tll1 combined micrometer,
5... Upper workpiece to be welded, 6... Lower workpiece to be welded, 7... Lower electrode, 9...
Power meter, 2 117

Claims (1)

[Claims] ■In the method of manufacturing an optical coupling part by resistance welding,
An upper workpiece and a lower workpiece are inserted between the upper electrode and the lower electrode, and a light emitting diode for optical axis alignment is made to emit light while applying a pressure of 0.1 to 2 cm/cnl to the workpiece. A method of manufacturing an optical coupling part, which comprises receiving light with an optical fiber, monitoring the light output with a power meter, aligning the optical axes with an XY axis alignment micrometer, and then performing resistance welding.