JP2927977B2 - Optical semiconductor device module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical communication module, and more particularly, to a connector detachable optical semiconductor device module capable of attaching and detaching an optical connector.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional optical semiconductor device module having a detachable connector. Conventional optical semiconductor device modules with detachable connectors are disclosed in, for example, Japanese Patent Application Laid-Open No. 64-521.
As shown in Japanese Patent Application Publication No. 03-2003, an end face of an optical fiber 5 disposed in a ferrule 4 of an optical connector 3 fitted to a glass plate 1 or a receptacle housing 2 in order to suppress return light to an optical semiconductor element. Is provided at a position that physically contacts the The glass plate 1 is fixed with the glass holding member 6 pressed into the receptacle housing 2.

[0003]

However, in the above-described conventional connector-removable type optical semiconductor element module, the glass plate 1 for preventing return light from the end face of the optical fiber is fixed as shown in FIG. This is press-fitting into the receptacle housing 2 which is a member. For this reason, the dimensional accuracy of the receptacle housing 2 and the glass plate 1 has to be considerably strict so that the compressive stress applied to the glass plate 1 does not exceed the breaking strength of the glass. Therefore, it is difficult to reduce the cost of individual components, and there is a limit in reducing the cost of assembly because a press-fitting step is involved during assembly.

An object of the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an optical semiconductor device module capable of reducing parts costs and assembly costs.

[0005]

According to a first aspect of the present invention, there is provided an optical semiconductor element module including an optical semiconductor element, a receptacle to which an optical connector is detachable, a dielectric block, and a condenser lens. , the dielectric block is in a position such that physical contact with the optical fiber end face of the ferrule of the optical connector fitted into the receptacle
And a lens holder and receiver
The optical semiconductor element is movable between three axes X, Y, and Z with respect to a condenser lens fixed between the receptacles by elasticity and fixed at a predetermined position of the optical semiconductor element module in advance. Is fixed in a receptacle, and after the positional relationship between the dielectric block and the condenser lens is determined, the position of the optical semiconductor element is fixed by welding.

[0006]

[0007]

According to the first aspect of the present invention, since a member or an elastic member formed to have elasticity is used for the fixing structure of the dielectric block , the dielectric block can be fixed at the time of fixing without making the processing accuracy of the member strict. Can be suppressed. For this reason, the cost of individual components can be reduced, and the assembly cost can be reduced by eliminating the press-fitting step during assembly. In addition, optical semiconductor device models
For the condenser lens fixed in place in the joule
The position of the optical semiconductor element can be adjusted in three axes, X, Y, and Z
And fix the dielectric block inside the receptacle
After adjusting the position, the positional relationship is fixed by welding.
Part that is formed to have elasticity
Optical connection deviation due to the presence of material can be eliminated.
Wear.

[0008]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of an optical semiconductor device module according to the present invention. The glass plate 10 used in this embodiment as a dielectric block has both end faces 1
This is a column-shaped quartz glass in which the other end face 12 is provided with an anti-reflection film after optical polishing of the first and the second. This glass plate 1
0 is optically polished into a convex spherical end surface. For example, the FO1-type single-core optical fiber connector / JIS. When the optical connector 13 of C5970 is installed in the receptacle housing 14 with the male screw 15, the core 18 of the optical fiber 17 fixed on the central axis of the ferrule 16 of the optical connector 13 comes to a position where it physically contacts. Are arranged as follows. At this time, the glass plate 10 is fixed while being sandwiched between the lens holder 19 and the holder 21 having the spring portion 20.

Now, a holder 21 formed to have elasticity.
4 to 6 are shown in FIGS. As shown in FIG. 5, a plurality of spring portions 20 are formed at equal intervals in the circumferential direction of the holder 21. When a load F1 shown in FIG. 6 is applied to the spring portion 20, the holder 21 uses the elasticity of the metal to generate an elastic force F2.
It is configured to have Thereby, when the glass plate 10 is sandwiched and fixed between the lens holder 19 and the holder 21, the compressive stress applied to the glass plate 10 is reduced by the elasticity of the spring portion 20 of the holder 21. The compressive stress applied to the glass plate 10 is the maximum compressive stress of quartz glass of 11.5 kgf.
/ Mm ² (safety factor 10 times) or less.

Next, the operation of positioning and fixing the optical semiconductor element package will be described. Light emitted from an optical semiconductor element (not shown) in the optical semiconductor element package 22 is condensed by a condenser lens 24 fixed in the lens holder 19 with a low-melting glass solder 23. Next, the optical semiconductor element package 22 is moved through the holder support 25 and the stem support 26 so that the optical semiconductor element package 22 is X, Y, Z so that the core 18 of the optical fiber 17 that physically contacts the glass plate 10 is efficiently coupled. It is adjusted in the axial direction, and after this adjustment, it is fixed by YAG laser beam welding. Note that reference numeral 2
Reference numeral 7 denotes a YAG laser beam weld.

As described above, in the present embodiment, the spring portion 20 is formed so that the holder 21 itself has elasticity. However, the present invention is not limited to this. That is, as shown in FIG. 7, an elastic member 28 having a larger elasticity than metal, such as rubber, is attached to the holder 29 and the receptacle housing 3.
Alternatively, the compression stress applied to the glass plate 10 may be reduced by being sandwiched between the first and second glass plates 10.

[0013]

As described above, according to the present invention, the fixing structure of the dielectric block is made of an elastic member or an elastic member, so that the processing accuracy of the member is not strict. In both cases, the compressive stress applied to the dielectric block during fixing can be reliably suppressed. For this reason, the cost of individual parts can be reduced, and the assembly cost can be reduced by eliminating the press-fitting step during assembly. Therefore, there is an excellent effect that a connector detachable type optical semiconductor element module which is lower in cost than the conventional one can be easily obtained. And in the present invention
Is a collection fixed at a predetermined position in the optical semiconductor device module.
The position of the optical semiconductor element with respect to the optical lens is X, Y, Z.
Keep the dielectric block
After fixing it in the receptacle, adjust the position and use it for welding.
It has elasticity because it fixes the positional relationship more
Optical semiconductor device models with the interposition of
It is possible to completely eliminate the optical coupling deviation of Joule
There is also an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an optical semiconductor element module according to the present invention.

FIG. 2 is a partially cutaway front view of an optical connector whose end face is optically polished into a convex spherical shape.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 2;

FIG. 4 is a sectional view of a holder.

FIG. 5 is a side view of the holder.

FIG. 6 is an operation explanatory view of a spring portion of the holder of FIG. 4;

FIG. 7 is a sectional view showing another embodiment of the optical semiconductor element module according to the present invention.

FIG. 8 is a sectional view showing an example of a conventional optical semiconductor element module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Glass plate 13 Optical connector 14 Receptacle housing 16 Ferrule 17 Optical fiber 19 Lens holder 20 Spring part 21 Holder 28 Elastic member 29 Holder 30 Receptacle housing

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Haruyasu Ando 5-7-1 Shiba, Minato-ku, Tokyo Within NEC Corporation (72) Inventor Tadashi Kobayashi 3-20-4 Nishishinbashi, Minato-ku, Tokyo Japan Electric Engineering Co., Ltd. (56) References JP-A-64-52103 (JP, A) JP-A-62-151812 (JP, A) JP-A-58-65008 (JP, U) JP-A-60-107906 ( JP, U) Japanese Utility Model Showa 61-56608 (JP, U)

Claims (1)

(57) [Claims] And 1. A optical semiconductor element, and a receptacle optical connector is removable, the constructed optical semiconductor device module includes a dielectric block and a condensing lens, said dielectric block is fitted to the receptacle Before
The optical fiber end face of the ferrule of the serial light connector at a position such that physical contact, and the condenser lens
Elastic between the holding lens holder and the receptacle
Leave freely moving the optical semiconductor device in the X, Y, and three axes of Z relative to pre-fixed the converging lens to a predetermined position of the optical semiconductor device module is fixed by the said dielectric block an optical semiconductor element module, wherein a position of said optical semiconductor device after the positional relationship between the condenser lens and the dielectric block is fixed to the receptacle is established are fixed by welding.