JPH07218760A - Structure and method for fixing optical component of optical equipment - Google Patents

Abstract

PURPOSE:To obtain the fixation structure for optical component of the optical equipment which facilitates fixation, has high fixation reliability, and enables low-loss connection by fixing the substrate of the optical equipment and the optical components arranged thereon with an adhesive, and fixing a pressing tool which presses the optical components and the substrate by welding. CONSTITUTION:A pressing tool 3 has a pressing part 11 for pressing an optical component 2 and a fixation part 12, which is installed and fixed on the substrate 1, in a Z shape. The pressing tool 3 may be molded of stainless steel or other materials. The optical component 2 which is installed in a V groove 9 is fixed to the V groove 9 with an epoxy adhesive, the optical component 2 is installed in a V groove 10 and has its optical axis adjusted, and then the optical component 2 is fixed to the V groove 10 with an epoxy adhesive. After the optical components 2 are fixed to the V grooves 9 and 10 respectively, the pressing parts 11 of pressing tools 3 are put on the optical components 2 and the fixation parts 12 of the pressing tools 3 are installed in the substrate to fix the components by YAG welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for an optical component of an optical device mainly used for optical communication, for example, an optical device used for a collimator, an optical branching device, a WDM, etc. and a fixing method thereof. .

[0002]

2. Description of the Related Art An optical collimator, which is one of the optical devices used for optical communication, has a substrate A and a V groove B as shown in FIG.
Rod lens (optical component) C, which is arranged in the position, a presser foot D for pressing the optical part C, an input side optical fiber (input side optical port) E attached to the presser tool D, an output side optical fiber (output side optical port) It is composed of F and. In this case, the fixing of the substrate A and the optical component C and the fixing of the substrate A and the pressing tool D are performed by either an adhesive or YAG welding.

[0003]

Fixing with an adhesive is simple and a low loss connection can be easily realized, but there is a problem in reliability of fixing with respect to temperature. Fixing by YAG welding has high reliability with respect to temperature, but there is a problem that low loss connection is difficult because axial displacement of the rod lens occurs during welding.

The object of the present invention is that the fixing as described above is easy,
An object of the present invention is to provide a fixing structure and a fixing method for an optical component of an optical device, which has high fixing reliability and enables low loss connection.

[0005]

[Means for Solving the Problems] Claim 1 of the present invention
As shown in FIG. 1, the fixing structure of the optical component of the optical device is such that the substrate 1 of the optical device and the optical component 2 arranged thereon are fixed by an adhesive, and the pressing tool 3 for pressing the optical component 2 and the substrate 1 are provided. Is fixed by welding.

As shown in FIG. 1, the fixing structure of the optical component of the optical device according to the second aspect of the present invention is such that the substrate 1 and the pressing member 3 are made of stainless steel, and both are fixed by YAG welding. .

As shown in FIG. 1, the fixing structure of the optical component of the optical device according to the third aspect of the present invention is such that the substrate 1 and the optical component 2 arranged thereon are fixed by an adhesive to press the optical component 2. In the optical component 2 in which the retainer 3 and the substrate 1 are fixed by welding, the substrate 1 and the optical component 2 are first fixed by an adhesive, and then the retainer 3 and the substrate 1 are fixed by welding. It is the one.

[0008]

In the fixing structure for the optical component of the optical device according to claim 1,
The substrate 1 and the optical component 2 installed and fixed thereto are adhesives,
Since the presser foot 3 that presses the optical component 2 and the substrate 1 are fixed by welding, the optical part 2 is adhesively fixed to the substrate 1 without the optical axis shifting, and the presser foot 3 is not affected by temperature or the like. Securely fixed to the substrate 1.

In the optical component fixing structure of the optical device according to the second aspect, since the substrate 1 and the pressing member 3 are made of stainless steel, they are easily fixed by YAG welding.

In the method of fixing the optical component of the optical device according to the third aspect, since the substrate 1 and the optical component 2 are first fixed with the adhesive, the optical component 2 can be easily adhered to the substrate 1, and after that, Since the pressing member 3 and the substrate 1 are fixed by welding after the component 2 is fixed to the substrate 1, the optical component 2 does not deviate from the axis during welding, and welding is facilitated.

[0011]

[Embodiment 1] A fixing structure and a fixing method for an optical component of an optical apparatus according to the present invention will be described in detail with reference to FIG. FIG. 1 shows a case where the optical device is a collimator, and this collimator has a substrate 1, a rod lens (optical component) 2 installed and fixed on the substrate 1, and a presser for fixing the optical component 2 to the substrate 1. It comprises a tool 3, an optical fiber (optical input port) 4 and an optical fiber (optical output port) 5 attached to the optical component 2.

The substrate 1 has central portions 8 at both longitudinal end portions 6 and 7.
It is one step higher than the optical component 2 at each end 6,7.
V grooves 9 and 10 are formed so as to face each other so as to facilitate installation. Further, the V groove 9 is formed slightly deeper than the V groove 10, and a tolerance (tolerance) for adjusting the optical axes of the both V grooves 9 and 10 is provided. The substrate 1 may be made of stainless steel or may be made of other material.

The retainer 3 shown in FIG. 1 comprises a retainer portion 11 for retaining the optical component 2 and a fixing portion 12 installed and fixed on the substrate 1 in a Z-shape. The presser foot 3 may be made of stainless steel, or may be made of other material.

In the present invention, the optical component 2 installed in the V groove 9 as shown in FIG. 2 is fixed to the V groove 9 with an epoxy adhesive, and then the optical component 2 is installed in the V groove 10 to set the optical axis. Adjust,
After that, the optical component 2 is fixed to the V groove 10 with an epoxy adhesive.

After the optical component 2 is fixed in the respective V-grooves 9 and 10, as shown in FIG. 3, the retainer 11 of the retainer 3 is put on the optical component 2 to retain the optical component 2 and the retainer. The fixing portion 12 of No. 3 is installed on the substrate 1 and fixed by YAG welding.

[0016]

[Experimental example of Embodiment 1] With the conventional fixed structure, the ambient temperature is 60.
There was an output fluctuation of 0.47 dB at room temperature (25 ° C.) at 0 ° C., but with the fixed structure of the embodiment of the present invention shown in FIG. 1, the output fluctuation was improved to 0.13 dB, and the reliability with respect to the ambient temperature was improved. Improved.

[0017]

[Embodiment 2] FIG. 4 shows another embodiment of a structure for fixing an optical component of an optical apparatus according to the present invention. This makes both longitudinal end portions 6 and 7 of the substrate 1 higher than the central portion 8 by one step, but does not form a V groove in the both end portions 6 and 7, and the pressing portion 11 of the pressing member 3 is formed in a downward V shape. And the fixing portions 12 for fixing to the substrate 1 are formed on both outer sides of the hem. When the holding portion 11 is put on the optical component 2 installed on both ends 6 and 7 of the substrate 1, the optical component 2 is housed in the downward V-shaped holding portion 11. . In this case, since the two fixing portions 12 on both outer sides of the pressing portion 11 are fixed to the substrate 1,
The fixing is more stable than the case where one fixing portion 12 is fixed as shown in FIG.

[0018]

[Other Embodiments] The shape of the presser foot 3 is not limited to that shown in the figure. For example, as shown in FIG. 5, the presser foot 3 is fixed to the substrate 1 on both outer sides of the hem of the presser part 11 formed downward. The fixing portion 12 may be formed. Also in this case 2
Since the one fixing portion 12 is fixed to the substrate 1, the fixing is stable. The presser foot 3 may be other than this.

Although the optical device is a collimator in the first embodiment, the optical device may be other than this, for example, an optical branching device, a WDM, a composite module of these, and the like. It can also be applied to the case where it is arranged and fixed on the substrate.

As the optical fiber 11 shown in FIGS. 1 to 3, it is possible to use a standard SM fiber, a DSF, a constant polarization fiber, and other optical fibers.

[0021]

The fixing structure of the optical component of the optical device according to the first aspect has the following effects. ． Since the substrate 1 and the optical component 2 are fixed by the adhesive, the optical component 2 is less likely to be misaligned when the optical component 2 is fixed to the substrate, and the two opposing optical components 2 have low connection loss. ． Since the substrate 1 and the retainer 3 are fixed by welding, they are securely fixed and stable, and the reliability of the optical component 2 with respect to the environment, particularly the ambient temperature, is improved. ． Since the adhesive fixing and the welding fixing are used together, the optical component 2
The reliability of the environment, especially the ambient temperature, is improved.

In the fixing structure of the optical component of the optical device according to the second aspect, since the substrate 1 and the pressing member 3 are made of stainless steel, both are easily YAG welded, the welding work is facilitated, and the welding is also firm and reliable. Become.

In the method of fixing the optical component of the optical device according to the third aspect, since the substrate 1 and the optical component 2 are first fixed with an adhesive,
The substrate 1 and the optical component 2 can be easily adhered to each other, and the substrate 1 and the retainer 3 are fixed to each other by welding after the substrate 1 and the retainer 3 are adhered to each other. There is no deviation and welding becomes easier.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first example of a collimator to which an optical component fixing structure and a fixing method of the present invention are applied.

FIG. 2 is a plan view of a collimator to which an optical component fixing structure and a fixing method according to the present invention are applied, the optical component being fixed to a substrate.

FIG. 3 is a plan view of a collimator to which an optical component fixing structure and a fixing method according to the present invention are applied, in which a retainer is fixed to a substrate.

FIG. 4 is a perspective view showing a second example of a collimator to which the fixing structure and the fixing method of the optical component of the invention are applied.

FIG. 5 is a perspective view showing another example of a retainer used in the optical component fixing structure and fixing method of the present invention.

FIG. 6 is a perspective view showing an example of a conventional collimator.

[Explanation of symbols]

 1 substrate 2 optical component 3 retainer

Claims (3)

[Claims] 1. A substrate (1) of an optical device and an optical component (2) arranged on the substrate are fixed with an adhesive, and a retainer (3) for pressing the optical component (2) and the substrate (1) are welded. A structure for fixing optical parts of an optical device, which is characterized by being fixed by. 2. The fixing structure for an optical component of an optical device according to claim 1, wherein the substrate (1) and the retainer (3) are made of stainless steel and both are fixed by YAG welding. 3. A substrate (1) and an optical component (2) arranged thereon are fixed by an adhesive, and a retainer (3) for holding the optical component (2) and the substrate (1) are fixed by welding. In the optical component (2) formed as described above, the substrate (1) and the optical component (2) are first fixed with an adhesive, and then the retainer (3) and the substrate (1) are fixed by welding. A method for fixing an optical component of an optical device, which is characterized by the above.