JPH0528804B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a connection mechanism for an optical semiconductor device to an optical fiber.

<Prior Art> Conventionally, a receptacle as shown in FIG. 5 has been used as an adapter to connect an optical fiber to an optical semiconductor device. When using this receptacle 2, the optical fiber 3 is also provided with a protective tube 4 that covers it, a caulking ring 5 that restricts the movement of the optical fiber 3, an epoxy resin 8, and a screw cover 6 that connects the optical fiber 3 and the receptacle 2. It is necessary to prepare. The optical fiber 3 thus constructed is inserted into one side of the through hole 2a of the receptacle 2, and the optical semiconductor device 1 is inserted into the other side of the through hole 2a.
The optical fiber 3 and the optical semiconductor device 1 are connected by inserting a resin body therein, bringing the tip of the optical fiber close to the resin body of the optical semiconductor device 1, and screwing the screw cover 6 onto the threaded portion 2b of the receptacle 2. and optically coupled.

<Problems to be Solved by the Invention> Therefore, in the past, in order to connect the optical semiconductor device 1 and the optical fiber 3, it was necessary to use an expensive adapter with a complicated structure as described above. . Furthermore, it becomes necessary to process the optical fiber so that it is compatible with the adapter, and
There was a problem that the work of connecting and connecting them was troublesome.

The present invention was created in view of the above circumstances, and
The object of the present invention is to provide a mechanism for connecting an optical semiconductor device to an optical fiber, which allows easy connection and connection work without requiring complicated and expensive adapters.

<Means for Solving the Problems> A connection mechanism for an optical semiconductor device to an optical fiber according to the present invention includes an optical semiconductor device, an elastic member, and a cap, and the optical semiconductor device is made of transparent resin. The main body has a generally cylindrical shape and a semiconductor element sealed in the main body, and the center of the upper surface of the main body has a recess with a size slightly larger than the outer diameter of the optical fiber and a tapered surface at the tip. The elastic member has a taper formed at the tip and a lens portion formed at the bottom of the recess, and the elastic member has a cylindrical shape with a slit in the axial direction, and the tip surface has a taper that tightly fits into the taper. The outer diameter of the cylinder is slightly larger than the diameter of the opening of the cap, and the cap has a bottomed cylindrical shape with an opening at the bottom, and the optical fiber is inserted into the elastic member. The cap and the optical semiconductor device are connected to each other by a connecting means provided on the optical semiconductor device and the cap while the elastic member is inserted into the cap in this state.

<Example> Hereinafter, an example according to the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view of a first embodiment of an optical semiconductor device according to the present invention. FIG. 2a is an exploded sectional view of FIG. 1, and FIG. 2b is a sectional view when optical fibers are connected.

In the figure, 10 is an optical semiconductor device, 20 is an elastic member, 30 is a cap, and 40 is an optical fiber.

The optical semiconductor device 10 includes a main body 11 and an optical semiconductor element 12 sealed in the main body 11.

The main body 11 is made of transparent resin and has a substantially cylindrical shape. A male thread 111 is formed around the cylinder. The top surface, i.e.
A recess 112 having a size slightly larger than the outer diameter of the optical fiber 40 is formed in the center of the optical fiber side. A lens portion 112 is provided at the bottom of the recess 112.
A is formed protrudingly. This lens portion 112A
serves to efficiently transmit light emitted from the optical semiconductor element 12 to the optical fiber 40 side when the optical fiber 40 is connected. A taper 112B is formed at the tip of the recess 112. The optical semiconductor element 12 may be, for example, an LED.

The elastic member 20 has a shape like a ferrule used for connecting piping, etc., for example. That is, it has a substantially cylindrical shape with a slit in the axial direction. A taper 21 is formed at its tip (optical semiconductor device side) to tightly fit into the taper 112B. The outer diameter of the cylinder is slightly larger than the diameter of the opening 31 of the cap 30.

The cap 30 is formed into a cylindrical shape with a bottom,
An opening 31 is formed at the bottom, and a female thread 32 that is screwed into the male thread 111 is formed on the inner surface of the cylinder. The male thread 111 and the female thread 32 constitute a connecting means. To connect the optical fiber 40, first, the optical fiber 40 is inserted into the elastic member 20, and then the elastic member 20 is inserted into the opening 31. At this time, since the diameter of the opening 31 is made slightly smaller than the outer diameter of the elastic member 20, the elastic member 20
As a result of being compressed inward by the opening 31,
The optical fiber 40 inserted into the elastic member 20 can be tightly fitted into the optical fiber 40 and held in a state where it is difficult to come out.

By screwing together the male screw 111 and the female screw 32, the main body 11 moves forward toward the optical fiber 40, and the tip of the optical fiber 40 comes into contact with the lens portion 112A (see FIG. 2b). Continue screwing further to make the connection tighter, and now the optical fiber 4
0 connection is completed.

FIG. 3 is an external perspective view of another embodiment, in which FIG. 3a shows an optical semiconductor device 50, and FIG. 3b shows a cap 60. That is, the optical semiconductor device 50
A plurality of protrusions 51, 51 are formed on the side surface of the cap 60, while protrusions 51, 51 are formed on the side surface of the cap 60.
1 is formed with a key-shaped groove 61 that engages with 1. In this case, the connecting means are the protrusion 51 and the key-shaped groove 61. That is, when the protrusion 51 is inserted into the key-shaped groove 61, the tip of the optical fiber 40 is just aligned with the lens portion 11.
It is designed to be crimped to 2A. In this embodiment, the elastic member 20 is the same as the one described above.

FIG. 4 is a drawing of another embodiment, and FIG.
4 is an external perspective view of the optical semiconductor device 70, and FIG. 4b is an exploded sectional view.

That is, a groove 71 is provided around the side surface of the optical semiconductor device 70, and a protrusion 81 is provided around the inner surface of the cap 80. In this case, the connecting means are the grooves 71 and the ribs 81. Concave groove 71
By engaging the convex vein 81, the optical fiber 40
connection is completed. In this embodiment as well, the elastic member 20 is the same as described above.

<Effects of the Invention> The connection mechanism of the optical semiconductor device to the optical fiber according to the present invention uses the optical semiconductor device, the cap, and the elastic member, and the cap and the optical semiconductor device are interconnected by the connecting means with the elastic member interposed. is connected to.

The basic configuration is such that the optical fiber is inserted into the elastic member, and is pressed against the lens portion by the connecting means.

Therefore, the structure is simpler than conventional equipment,
It has the advantage of being cheap to manufacture. Additionally, optical fiber connections can be made with just one touch, which is extremely convenient.

[Brief explanation of the drawing]

1 to 4 are drawings according to the present invention, in which FIG. 1 is an external perspective view of a first embodiment of an optical semiconductor device according to the present invention, and FIG. 2a is an exploded view of FIG. 1. A cross-sectional view, FIG. 2b is a cross-sectional view when an optical fiber is connected, FIG. 3 is an external perspective view of another embodiment, FIG. 3a is a semiconductor device 50, and FIG.
indicates a cap. FIG. 4a is an external perspective view of the semiconductor device 70, and FIG. 4b is an exploded sectional view. FIG. 5 is a diagram related to the prior art, and is a sectional view of a state in which optical fibers are connected. 10...Semiconductor device, 11...Semiconductor element, 1
11...male thread, 112...recess, 112A...
Lens portion, 112B... Taper, 20... Elastic member, 21... Taper, 30... Cap, 40...
...Optical fiber, 50...Semiconductor device, 51...Protrusion, 60...Cap, 61...Key-shaped groove, 70...
...Semiconductor device, 71...Concave groove, 80...Cap, 81...Convex vein.

Claims (1)

[Scope of Claims] 1. The optical semiconductor device includes an optical semiconductor device, an elastic member, and a cap, and the optical semiconductor device includes a substantially cylindrical main body made of a transparent resin and a semiconductor element sealed in the main body. At the center of the upper surface of the main body, there is a concave portion having a size slightly larger than the outer diameter of the optical fiber and having a tapered surface formed at the tip thereof, a taper formed at the tip of the concave portion, and a lens portion formed at the bottom of the concave portion. The elastic member has a cylindrical shape with a slit in the axial direction, and its distal end surface is formed with a taper that closely fits into the taper, and the outer diameter of the cylinder is smaller than the diameter of the opening of the cap. The cap is formed with a slightly larger diameter, and the cap has a bottomed cylindrical shape with an opening at the bottom, and when the optical fiber is inserted into the elastic member and the elastic member is inserted into the cap, the optical semiconductor device and the cap can be connected. 1. A connection mechanism for connecting an optical semiconductor device to an optical fiber, characterized in that the cap and the optical semiconductor device are connected by a connecting means provided. 2. A connection mechanism for an optical semiconductor device to an optical fiber according to claim 1, wherein the connecting means is a male screw formed on a side surface of the optical semiconductor device and a female screw formed on an inner surface of a cap. . 3. The connecting means is a key-shaped groove that engages with a plurality of protrusions formed on the side surface of the optical semiconductor device and the protrusion formed on the peripheral surface of the cap. Mechanism for connecting optical semiconductor devices to optical fibers. 4. Claim 1, wherein the connecting means is a groove formed around the side surface of the optical semiconductor device and a convex vein formed around the inner surface of the cap that engages with the groove.
A connection mechanism for connecting the optical semiconductor device to an optical fiber as described in 2.