JPS63208008A - Method and device for assembling fiber module for optical communication - Google Patents

Abstract

PURPOSE:To facilitate correction of a positional deviation and to improve assembling accuracy by executing point welding successively along the rotating direction of a flange part. CONSTITUTION:A flange part 18 and a stem 19 are respectively separately pressurized and held in nearly equally distributed plural positions in the direction perpendicular to the sliding contact surfaces thereof. The flange part 18 and the stem 19 are successively spot-welded by laser light along the circumferential direction thereof after holding in this holding stage. The relative positional deviation of the flange part 18 with respect to the stem 19 is further corrected at every spot welding. Namely, the point welding of a fiber module 10 is successively executed along the rotating direction of the flange part 18, by which the positional deviation below mum is surely corrected. The assembly of the fiber module for optical communication with high efficiency and high accuracy is thereby permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method and apparatus for assembling an optical communication fiber module used for assembling an optical communication fiber module.

(Conventional technology) Conventionally, optical communication using laser diodes and fibers7
In IPA modules, alignment of the optical axes of the laser diode and fiber is extremely important, and precision on the submicron order is required for this adjustment. By the way, the structure of this type of original communications 7-eye module is as shown in Figure 4, in which the source of light emitted from the lens (B) of the lens cap (A) containing the laser diode is connected to the fiber (C). It has a structure that allows it to be incident.

By the way, when assembling and manufacturing this fiber module for optical communication, as shown in FIGS. 5 and 6, the lens cap (A) is attached with the fiber (C) supported by the fiber support (D). The stem (
B) and the flange (F) of the fiber support (D) are in sliding contact with each other, and pressurized by four pressurizing arms (G) that are swingable in the direction of the arrow (K). While
Both were point welded using YAG laser light. Pressure is applied by the above pressure arm (G)... to the stem (E).
This is done to minimize the gap between the flange (F) and the flange (F). Moreover, point welding is performed in the vicinity of the pressure arm (G) for each point. The welding order at this time is diagonally from point (Pl) to point (P8). Moreover, since a positional shift occurs for each welding point, it is necessary to perform optical axis adjustment every time one point is completed, which is a cause of a decrease in assembly efficiency.

(Problems to be Solved by the Invention) The present invention has been made in consideration of the above-mentioned problems of the prior art. An object of the present invention is to provide a fiber module assembly method and apparatus.

[Structure of the invention]

(Means and effects for solving the problem) The assembly method of the present invention ensures correction of positional deviation of less than μm by sequentially performing point welding of fiber modules along the direction of rotation of the flange portion. It was made so that it could be done on millet.

The assembly device of the present invention improves assembly accuracy by providing a pressurizing means that applies pressure at a plurality of approximately equally distributed positions along the sliding contact surface between the stem and the flange portion from a direction in which no component force is generated. This is how it was done.

(Example) Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an optical communication fiber module 4 assembled in this embodiment. This original communication fiber module fi has a cap ring with a hollow interior, and an optical semiconductor, such as a laser diode α, is installed inside the cap (Ll).

The earthen wall of this cap Qη is equipped with the laser diode a.
A lens Q3 is provided for condensing the laser light emitted from the lens. The input end of the fiber (14) is optically opposed to the condensing position of the laser beam by this lens. The input end side portion of the fiber α (I!19 is a fiber sabot) C1) is inserted into the small diameter cylindrical portion αη of 19 and fixed by welding using a YAG laser or the like. In other words, the fiber support αQ covers the cap aυ, and the flange portion (1a) at the periphery of its opening is attached and fixed to the stem (1) of the cap αυ by a method described later. (The outside of the IQ is surrounded by a cover (not shown), and the peripheral edge of this cover is attached and fixed to the stem (LI) of the cap Qυ by YAG laser welding or the like. It passes through the upper part of the cover and is led out to the outside, and is fixedly attached to the cover.

A midway portion of the fiber I located between each fixing portion of the fiber I by the fiber support (ll19 and the cover) is formed with a small diameter 7-lexiple portion CD.

Next, let's look at the optical communication fiber module with the above configuration! - The assembly device (■) of Rule 0I will be described.

This assembly device 6I assembles the stem (1!) of the cap (1).
A holding part f51) on which the lower surface of J is placed over the entire circumference, four pressure parts 6 provided equidistantly around this holding part 6υ, and four pressure parts 6 provided above the holding part 6υ. Retaining part 6υ
It consists of a laser welding part in which the flange part of the fiber module holder held in the fiber module holder and the stem α field are laser welded using, for example, a YAG laser beam (see FIG. 2). The holding part 61) has a cylindrical pedestal 6a, and the upper end of this pedestal (5) has a recessed part (54).
a) is provided, and the main body of the stem (II) is loosely inserted into this recess (54a). This pedestal is fixed to an XY table (not shown).

On the other hand, the pressure section 63... has a pressure lever (to) that applies pressure at one end together with the stem (19 and 7 run 9 part αυ on the pedestal 64), and these pressure levers 651... The air cylinder, which is a lifting mechanism that moves up and down in the arrow directions (49 directions), and the pressure lever (to)...
A guide mechanism 67) that supports the other end and guides it in the ascending and descending direction.
It consists of... Then, pressurize lever (G)
. . . consists of tongue-shaped contact pieces (51) and rod-shaped supports that support these contact pieces 51)G. In addition, the air cylinder (4) that is the lifting mechanism
. . . represents a piston rod 6υ that engages from above in the middle part of the support member, and these piston rods 6.
It consists of a main body fi2... which drives υ... up and down. On the other hand, the guidance mechanism? 57) ... is the pressure lever 6
! 19... It consists of a cross roller guide link connected to the other end and a guide pillar (foundation) that guides these cross roller guide members in the direction of the arrow (4). Further, the laser welding part (to) is connected to a YAG laser device (not shown) and a laser beam emitted from the YAG laser device to a plurality of points on the flange portion Q8).
It consists of an optical system (not shown) that irradiates (Pi)'...(P8) in a predetermined order.

Next, a method for assembling the optical communication fiber module 4 of this embodiment using the assembly apparatus having the above configuration will be described.

First, the stem α field of the cap αυ is placed on a support stand (24), and the fiber support αe is placed over the cap aυ.

Then, the stem of the cap aυ (fiber support for 19) (1) After ensuring that the flange parts of 19 are aligned, operate each air cylinder (G)... direction and press the tips of the respective pressure levers 69 against the flange portion Q8 of the 7-eye support) (1G).Then, by applying pressure, the stem of the character 7' (lυ (The 1G flange part α seconds is fixed under pressure. The input end side part a4 of the fiber I is inserted perpendicularly to the small diameter cylindrical part α force of the fixed fiber support αe and positioned. In this state, a current is applied to the laser diode C121 to cause the laser diode α to emit light. This laser light is focused by the lens a3 and input to the fiber (14), and the output from the output end of the fiber I is measured using a power meter. Then, move and adjust the input end side portion (19) of the fiber I in each direction of XYZ to select the position where the output power from the output end of the fiber α is maximum and fix it at this position.Furthermore, , in consideration of the influence of heat due to soldering, move it upward in the Z direction by 30 to 40 μm.

Here, solder is injected into the small diameter cylindrical part C1? ) is heated with a soldering iron or high frequency to perform soldering. Thereafter, the driving force of each air ring stamp is weakened to bring the pressure applied by each pressure lever (g) to zero. and,
While fixing the fiber support αe, the stem 0 of the cap is moved in the X and Y directions to find the position where the output power from the output end of the fiber αa is at its maximum value. When the output power reaches its maximum value, the pressurizing force from each pressurizing lever is applied again, but at this time, the stem α barrel of the cap αυ is finely adjusted in the X and Y directions while slowly applying pressure. Then, the mating surface of the stem QSl door y of the cap αυ with the 72-inch cod of the support αQ fits firmly.
Moreover, the fiber support (flange part α barrel of 1Q)
Make fine adjustments in the X and Y directions while applying pressure with the pressure lever (to) until it reaches a pressure that does not cause deformation. The output power reaches its maximum value when this fine adjustment is completed. Therefore, while maintaining this pressurized state, as shown in FIG. A YAG laser beam is irradiated from the perpendicular direction to each K, and the spots are welded and fixed at equal intervals. In this case, each point (Plj...
・Every time we weld one (P8)', repeat the fine adjustment in the XY direction of the stem (L9) of the cap I by moving the XY table on which the pedestal is fixed.In other words, by one point Repeat fine adjustments while welding.Furthermore, in this case, each point) (Pi)...(P8)
The welding order should be in the circumferential direction as shown in the welding arrow).

As described above, the assembly apparatus for the optical communication fiber module OI of this embodiment uses the pressurizing lever 59, which is provided so as to be able to move up and down in the arrow 4! Since α9 is pressurized, positional deviation due to the shrinkage difference in the X and Y directions that occurs during YAG laser welding can be significantly reduced.
Pressure lever (g)... is the flange part a barrel and stem a
Since the pressure is applied in a direction perpendicular to the sliding surface with the bell, no component force is generated in the direction along the sliding surface when applying pressure. This can be done reliably and with high precision.

In addition, the method for assembling the optical communication fiber module uQ of this embodiment is to perform point welding at equal intervals in the arrow t4b1 direction, that is, in the circumferential direction, and to correct positional deviation for each point. , and finally can be assembled with high precision.

In particular, since welding is performed in the circumferential direction, it becomes easier to move in the rotational direction around the welding point, making it possible to reliably correct misalignment.

In addition, in the assembly apparatus of the above embodiment, an air cylinder is used as the elevating mechanism, but the invention is not limited to this.
Other mechanisms such as hydraulic cylinders, cam mechanisms, etc. may also be used.

Furthermore, instead of the pressurizing Lenocou R551..., it may be possible to apply pressure in the direction of the arrow with the tip of the nine abutting rods that stand upright.

Furthermore, in the assembly method of the above embodiment, the welding point is
The score is 8 points, but this number may be increased or decreased as appropriate. , r Also, the welding point is pressurized Leno''-(55)...

The location does not have to be close to. [Effects of the Invention] The assembly device for optical communication fiber modules of the present invention applies pressure from a direction in which component force in the direction along the sliding contact surface between the flange portion and the stem portion does not act. can be performed reliably and with high precision.

In addition, the method of assembling the original communication 7 AINO module of the present invention is to sequentially perform point welding along the rotational direction of the flange, making it easy to correct positional deviations of μm or less, and the final Contributes to improving assembly accuracy.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an optical fiber module for optical communication, which is an object of assembly of the present invention, and Fig. 2 is a block diagram of an assembly device for an optical fiber module according to an embodiment of the present invention, and an explanatory diagram of the technique. . uO) Fiber module for dual communication. (1)): Cap. (1ri: Laser diode (optical semiconductor device). 04): 7 Eyepa. aQ: Fiber support. (L barrel: flange part. Eel: stem. 60: Holding part (holding means). 5 near II] Pressure part (pressurizing means). 64: Laser welding part (welding means). Q: Contact piece ( (Pressure piece).Representative Patent Attorney Noriyuki Chika Yudo Kikuo TakehanaFigure 1Figure 2

Claims (2)

[Claims] (1) A cap provided with an optical semiconductor element, a disc-shaped stem that supports this cap, a fiber support that surrounds the cap and has a flange portion that coaxially slides on the stem, and this fiber support In the method of assembling a fiber module for optical communication, the flange portion and the stem are each mounted in a direction perpendicular to the sliding surface of the flange portion and the stem at a plurality of approximately equally spaced positions. A holding step of separately pressurizing and holding;
After holding in this holding step, the flange portion and the stem are sequentially spot welded along the circumferential direction using a laser beam, and the relative position of the flange portion with respect to the stem for each spot welding. 1. A method for assembling a fiber module for optical communication, comprising the step of correcting a positional deviation. (2) A cap provided with an optical semiconductor element, a disk-shaped stem supporting this cap, a fiber support surrounding the cap and having a flange portion coaxially slidingly contacted with this stem, and this fiber support A fiber module assembly apparatus for optical communication having a fiber supported by an optical semiconductor element and facing the optical semiconductor element, comprising: a holding means for holding the flange portion and the stem in sliding contact with each other in a position adjustable manner; Pressure pieces are provided at equal intervals, and by driving the pressure pieces separately, the stem and the flange portion held by the holding means are pressurized in a direction perpendicular to their sliding surfaces. 1. An assembly apparatus for an optical communication fiber module, comprising: a pressurizing means; and a welding means for laser welding the stem and the flange, which are pressurized by the pressurizing means, in a spot shape.