JPH0344605A - Method for assembling optical element module - Google Patents

Abstract

PURPOSE:To inexpensively assemble the optical element module in a shot period of time by parallel aligning the joint surfaces of the optical element holder and an optical fiber holder by a biaxial tilting fine adjustment base and aligning the center of rotation of the biaxial tilting fine adjustment base to joint surfaces and welding the surfaces. CONSTITUTION:The inclination of the optical element holder 5 is adjusted by the tilting fine adjustment base 11 if there is the inclination in the joint surfaces of the optical element holder 5 and the optical fiber holder 7. The optical fiber holder 7 is then moved by its own weight in the state of maintaining contact with the optical element holder 5 according to the inclination amt. of the joint surfaces. The moving quantity thereof is detected by a meter 12 and the fine adjustment base 11 is fixed where the optical fiber holder 7 moves nearest to the optical element holder 5. A similar adjustment is a perpendicular direction to the joint surfaces is performed on the tilting five adjustment base. The end face of the optical fiber 4 is registered and held by means of an optical fiber holding jig 9 to the position where a light beam 2 emitted from an optical element 1 is condensed by a lens 3 and thereafter, the joint surfaces of the optical element holder 5 and the optical fiber holder are fixed by welding, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for assembling an optical element module.

[Conventional technology]

Conventionally, as a method for assembling this type of optical element module, there have been methods shown in FIGS. 3 and 4.

Figure 3 is a schematic diagram showing the state after the alignment of the optical element holder and optical fiber holder is completed using the conventional method of assembling an optical element module, and Figure 4 shows the state where the optical element holder and optical fiber holder are joined by welding or the like. It is a schematic diagram showing a later state. In Figure 3, (1) is the optical element, (2) is the optical element (1
) is emitted by a light beam.

(3) is a lens that focuses this light beam (2), (4
) is an optical fiber for interfacing with external equipment, (
5) is an optical element holder that holds the optical element fil and the lens (3), and (6) is a sleeve that holds the optical fiber (4).

(7) is an optical fiber holder that holds this sleeve.

(8) is an optical element holder holding jig, (9) is an optical fiber holder holding jig, and Ql is a welding bead.

Next, the operation will be explained.

The light beam (2) emitted from the optical element (1) passes through the lens (
3) It is focused and coupled to an optical fiber (4) and transmitted to an external device. It was a cabinet. In order to obtain good coupling efficiency, the end face of the optical fiber (4) must be connected to the optical element 0 with respect to the focal point of the light beam (2) emitted from the optical element (1) and condensed by the lens (3). ) to the optical fiber (4) with submicron precision in a direction perpendicular to the optical axis and fixed.

Therefore, when assembling this optical device module, the optical device holder holding jig (8) should be used to avoid tilting the joint surfaces of the optical device holder (5) and the optical fiber holder (7) as much as possible. The parallelism of the optical fiber holding jig (9) should be sufficiently controlled, and the joint between the optical fiber holder (5) and the optical fiber holder (7) should be aligned. angle, and the joint between the optical fiber holder (7) and the optical fiber holder holding jig (9) and the optical element holder (5).
) and carefully manage each joint. After that, the optical element (1
) is emitted from the light beam (2) and focused by the lens (3).
) to the converging point of the optical fiber (4) in the direction perpendicular to the optical axis with an accuracy of a napkin. Furthermore, from this state, the optical fiber holder holding jig (9) is pressed toward the optical element holder holding jig to avoid the slight inclination that occurs at the joint surface between the optical element holder (5) and the optical fiber holder (7). is removed, and the joint surface is fixed by welding or the like.

Among them, Q. is a weld bead that occurs when fixed by welding.

[Problem to be solved by the invention]

Since the conventional method for assembling an optical device module is configured as described above, the perpendicularity between the joint surfaces of the optical device holder (5) and the optical fiber holder (7) and each holding jig is increased. Must be processed with precision.

It is necessary to set the parallelism between the holding jigs so that there is no angle as much as possible, and also to press the optical fiber holder (7) against the optical element holder (5) before welding. (2) Focus point and optical fiber (4)
There were problems in that the nine parts were expensive and required a lot of time to assemble, such as misalignment of the end faces.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for assembling an optical element module that uses two parts at low cost and requires a short assembly time.

[Means to solve the problem]

A method of assembling an optical element module according to the present invention is as follows.

The optical element holder and the optical fiber holder are each provided with a bonding surface in a direction perpendicular to the optical axis from the optical element to the optical fiber,
Either the optical element holder or the optical fiber holder is placed on a two-axis inclined fine movement table having a rotation center on the bonding surface, the other is movable in a direction perpendicular to the bonding surface, and the amount of this movement is detected. It is held on a fine movement table equipped with a means to
In order to control the two-axis tilting fine movement table by the movable amount detection means, the joint surfaces are held parallel and in contact with each other and fixedly assembled by welding or the like.

[Effect]

The method for assembling an optical element module in this invention is to align the joint surfaces of the optical element holder and the optical fiber holder in parallel with each other using a two-axis tilt fine movement table, and press the optical fiber holder against the optical element holder, thereby focusing the light beam. In addition to eliminating misalignment of the end face of the optical fiber, it is also possible to easily detect the parallelism of the bonded surface according to the amount of movement of either the optical element holder or the optical fiber holder in the direction orthogonal to the bonded surface. Accurate control is possible, and by aligning the rotation center of the two-axis tilting fine-adjustment table with the above-mentioned joint surface, the optical element holder and the optical fiber holder can be moved in a direction perpendicular to the optical axis of the optical element holder and the optical fiber holder by the operation of the two-axis tilting fine-adjustment table. It is possible to prevent the relative position shift of

〔Example〕

An embodiment of the present invention will be described below.

gt diagram is a schematic diagram showing the state after the alignment of the optical element holder and the optical fiber is completed according to the method for assembling the optical element module according to the present invention, and Fig. 2 shows the optical element holder and the optical fiber holder being joined by welding or the like. It is a schematic diagram showing a later state. Draw it on the diagram.

(11 is an optical element, (2) is a light beam emitted from this optical element (1), and (3) is a lens that condenses this light beam (2).

(4) is the optical 7 eyeglass, (5) is the optical element holder that holds the optical element (1) and lens (3), (6) is the 7 errule that holds the optical fiber (4), (7) is an optical fiber holder that holds the optical fiber (4) through this ferrule (6).

(8) is an optical device holding jig that holds the optical device holder (5), (9) is an optical fiber holding jig that holds the optical fiber holder (7), aI is the weld bead, and side is the optical device Inclined fine movement table A whose rotation center is at the joint surface of the holder (5) and optical fiber holder (7), α y is a meter that detects the amount of movement of the optical fiber holder, and αj is the tilted fine movement table A.
This is an inclined fine movement table B that is inclined in a direction perpendicular to al) and has its rotation center on the above-mentioned joint surface.

Next, the operation will be explained.

In this method of assembling an optical element module, the optical element holder (
5) and the optical element holder (5), if there is an inclination in the joint surface of the optical element holder (7), the inclined fine movement table AQI)
When the inclination of the optical fiber holder (7) is adjusted, the optical fiber holder (7) is brought into contact with the optical element holder (5) due to its own weight.

It moves according to the amount of inclination of the joint surface. The amount of movement of this optical fiber holder (7) is detected by a meter α.

The tilting fine movement platform αυ is fixed at the point where the optical fiber holder (7) is closest to the optical element holder (5). Similarly, adjustment in the direction perpendicular to the joint surface is performed using the tilted fine adjustment table BO.

After that, the end face of the optical fiber (4) is aligned and held by the optical fiber holding jig (9) at the position where the light beam (2) emitted from the optical element is focused by the lens (3). Thereafter, the joint surfaces of the optical element holder (5) and the optical fiber holder (7) are fixed by welding or the like.

In the above embodiment, the optical element (1) and lens (3) are held in the optical element holder (5), and the optical fiber (4) is held in the optical 7 eyeper holder (7) via the ferrule (6). .

The case where the optical element holder (5) and the optical fiber holder (7) are joined is shown, but the optical element (1) and the lens (
3) are each held by separate holders, and the same effect can be obtained even when the holders are joined. Furthermore, optical element 0)
A similar effect can be obtained when the optical fiber (4) is directly coupled to the optical fiber (4).

Further, in the above embodiment, a light emitting element is used as an example of the optical element il+, but a light receiving element can also have the same effect.

〔Effect of the invention〕

As described above, according to the present invention, the joint surfaces of the optical element holder and the optical fiber holder are aligned parallel to each other using a two-axis tilting fine movement table,
The parallelism of the joint surfaces is detected by the amount of movement of the holder in the direction orthogonal to either of the joint surfaces, and the center of rotation of the two-axis tilting fine movement table is aligned with the joint surface. There is no need to manage the perpendicularity between the holding jig and the bonding surface of each of the element holder and the optical fiber holder, resulting in lower parts costs, and an assembly method that facilitates two-way assembly and shortens assembly time.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a state after the alignment of an optical element holder and an optical fiber holder is completed according to an optical element module assembly method according to an embodiment of the present invention. Figure 2 is a schematic diagram showing the state after the optical element holder and optical fiber holder are joined by welding etc. Figure 3 is a completed alignment of the optical element holder and optical fiber holder using the conventional optical element module assembly method. FIG. 4 is a schematic diagram showing the state after the optical element holder and the optical fiber holder are joined by welding or the like. In the figure, (1) is an optical element, (2) is a light beam, and (3
) is a lens, (4) is an optical fiber, (5) is an optical element holder, (6) is a ferrule, (7) is an optical fiber holder,
(8) is an optical element holding jig, (9) is an optical fiber holding jig, aI is a welding heat)', (1ml, αJ is an inclined fine movement table,
The circle is a meter. In Figure 1, the same symbols indicate the same or equivalent parts.

Claims (1)

[Claims] In a method for assembling an optical element module whose main components include an optical element, an optical element holder that holds the optical element, and an optical fiber holder that holds an optical fiber for interface with an external device, the optical element holder and the optical fiber are Each holder is provided with a joint surface in a direction perpendicular to the optical axis from the optical element to the optical fiber, and either the optical element holder or the optical fiber holder is tilted biaxially with the center of rotation at the joint surface. The other side is movable in a direction perpendicular to the joining surface and is held on a fine movement table which is equipped with a means for detecting the amount of movement, and the two-axis tilting fine movement table is moved by the movement amount detection means. A method for assembling an optical element module, characterized in that the joint surfaces are held parallel and in contact with each other by control, and fixedly assembled by welding or the like.