JPH0521888Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an optical semiconductor module used in optical communication trunk lines and the like.

[Conventional technology]

FIG. 2 is a sectional view showing a typical conventional optical semiconductor module.

In the figure, 1 is a housing, and 2 is a male thread provided on the housing 1, which is combined with a female thread provided on an FC type connector for connection. Reference numeral 3 denotes a hole provided in the housing 1 into which an optical fiber holding portion (hereinafter referred to as ferrule) provided in the FC type connector is inserted. 4 is a wall for positioning the ferrule pushed out by a spring provided on the FC type connector; 5 is a light passage hole provided in the wall 4; A lens 6 is inserted into a hole 7 provided in the housing 1 and fixed with a screw 8. Reference numeral 9 denotes an optical semiconductor element assembly, which includes an optical semiconductor element 1 fixed to a stem 10.
1 and lead terminal 12, the optical semiconductor element 11
A protective cap 13 is fixed to the stem 10 so as to cover the stem 10, and the protective cap 1 is fixed to the stem 10 so as to cover the light passage hole 14 provided in the protective cap 13.
It is constructed by a light transmitting plate 15 fixed to 3. Note that the optical semiconductor element assembly 9 is joined by a joining surface 16.

The conventional optical semiconductor module is constructed as described above, and by inserting the ferrule into the hole 3 and connecting the male screw 2 with the female screw provided on the FC type connector,
The FC type connector is fixed to the housing 1, allowing optical coupling between the optical semiconductor element 11 and the optical fiber within the ferrule.

[Problem that the invention attempts to solve]

In the above structure, when the ferrule is inserted into the hole 3, a gap is formed and the ferrule moves due to the gap, so that stable optical coupling cannot be obtained.

This invention was made in order to solve the above-mentioned problems, and is aimed at an optical semiconductor module that can obtain stable optical coupling.

[Means for solving problems]

In the optical semiconductor module according to this invention, a split sleeve is provided as a member for inserting and holding the ferrule, and a dummy ferrule having an outer diameter equal to the outer diameter of the ferrule and having a light passage hole is attached to the split sleeve so as to be in contact with the end surface of the ferrule. This is a rule inserted.

[Effect]

In this invention, movement of the ferrule can be prevented by holding the ferrule with a split sleeve.

〔Example〕

FIG. 1 is a cross-sectional view showing an embodiment of this invention, in which numerals 2, 6 and 8 to 16 are the same as the conventional structure described above. 1a, 1b, and 1c are members each forming a part of the housing 1, and 1a and 1b
is fixed with screws or the like. Also, 1b and 1c
are joined by a joining surface 17. A split sleeve 18 has an inner diameter slightly smaller than the outer diameter of the ferrule, and is provided inside second holes 19a and 19b provided in the housings 1a and 1b. 20 has an outer diameter equivalent to the above ferrule outer diameter,
The dummy ferrule is a dummy ferrule having a light passage hole 21, one end surface of which passes through a hole 22 provided in the housing 1b, and is inserted into the split sleeve 18 so as to be in contact with the end surface of the ferrule, and a screw 23 is attached to the housing 1b. It is fixed by.
A first hole 24 is larger than the outer diameter of the ferrule and smaller than the outer diameter of the split sleeve 18, into which the ferrule is inserted.

Note that the split sleeve 18 when the ferrule on the connector side and the dummy ferrule 20 are inserted
As shown in FIG. 1, a gap is formed between the outer peripheral surface of the split sleeve 18 and the second hole 19 communicating with the first hole 24.

[Effect of idea]

As described above, according to the optical semiconductor module of this invention, the ferrule on the connector side is positioned by one end surface of the dummy ferrule, and the elastic force of the split sleeve causes the ferrule to be coaxially aligned with the dummy ferrule. By holding the ferrule, movement of the ferrule can be prevented and stable optical coupling can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention, and FIG. 2 is a sectional view showing a conventional optical semiconductor module. In the figure, 1a, 1b and 1c are housings, 2 is a male screw, 6 is a lens, 8 is a screw, 9 is an optical semiconductor element assembly, 10 is a stem, 11 is an optical semiconductor element, 12 is a lead terminal, and 13 is a protective cap. , 14 is a light passing hole, 15 is a light transmitting plate, 16 is a joint surface, 17 is a joint surface, 18 is a split sleeve, 1
9a and 19b are holes, 20 is a dummy ferrule,
21 is a light passing hole, 22 is a hole, 23 is a screw hole, 24
is a hole. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] an optical semiconductor element assembly having an optical semiconductor element, a split sleeve having an inner diameter smaller than an outer diameter of an optical fiber holding part on the connector side, a first hole for inserting the optical fiber holding part, and the split sleeve, a second hole having a diameter larger than the outer diameter of the split sleeve when the optical fiber holding portion is inserted and communicating with the first hole; the second hole and the optical semiconductor; a housing having a lens located between the optical semiconductor device and the optical semiconductor device, a joint surface that connects the optical semiconductor device assembly, and a screw portion that connects to the connector; and a housing that is provided between the optical semiconductor device assembly and the split sleeve, and A dummy ferrule that is inserted into the split sleeve so as to be in contact with the end surface of the optical fiber holding part and has an outer diameter equal to the outer diameter of the optical fiber holding part and has a light passage hole. semiconductor module.