JPS59160116A - Optical module for optical communication - Google Patents

Abstract

PURPOSE:To enable heating of a fixing ring with slight heating of a soldering iron and to prevent failure of a photodetector or light emitting element owing to heat by interposing the fixing ring between an optical module body and the photodetector or light emitting element. CONSTITUTION:A rod lens 15 is fixed by means of an adhesive agent 19 to a module body 14, and a light emitting element 12 is fixed by means of solder 20 to a fixing ring 13. The ring 13 is screwed to the body 14 and the body 14 is screwed to a receptacle 16. It is necessary to heat the ring 19 with a soldering iron in order to solder 20 the ring 13 and since the ring 13 does not have a large volume, the heat capacity is small and the ring 13 is soldered by heating in a short time. The element 13 is thus fixed by the solder 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a light emitting module or a light receiving module for optical communication (hereinafter simply referred to as an optical module). '+J' for the light emitting module and light receiving module that serve as the light source? With the increase in the number of accidents, it has become important to efficiently produce items that are free from damage. By the way, as shown in Fig. 1, a conventional light-emitting module consists of a light-emitting element (1), a module body (2), a rod lens (C3), and a receptacle (4). 3) with adhesive (force), and solder [F
]) is added to the module ``Human Body'', and this module main body ② is constructed by screwing into the receptacle (4). Then, by inserting the core (51) in which the optical fiber (6) is completely fixed in the receptacle (4), the original fiber (6) trond lens G) is emitted from the light emitting element (1). The pierced light is on the rod lens (3)! 2 The light is focused,
It enters the optical fiber (6). When assembling this light emitting module, first, as shown in Fig. 2, the light emitting element (1), the rod lens (3), the optical fiber (
6), and the emitted light from the light emitting element (1) is transmitted through the optical fiber (
The distance A between the light emitting element (1) and the rod lens 0 and the rod lens G) and the optical fiber 6) are set so that the light is efficiently incident on the light emitting element (1) and the rod lens 0).
Find the distance B between them, and install the optical fiber (6) and rod lens (
3) Fix the rod lens with the rod lens (adjust the distance a and use the adhesive V) so that the distance of point B is B, then attach the light emitting element (1) to the module body (2) with the VC claw, and then attach the light emitting element (1) to the module body (2). ) and the rod lens (3) are fixed to the AWI part, and the light emitting element (1) is fixed to the module water body (2) with solder S). However, when fixing the light emitting element (1) to the module body 2) with solder (8) in this way, it is necessary to heat it to apply the solder to the module body (2).
After adjusting the position of the light emitting element (1), a soldering iron is brought into contact with the molten solder on the module body to heat it, and at this time the light emitting element (1) is also heated.

Since the module main body Q) is relatively large and has a large heat capacity, it is necessary to take a long time to heat it with a soldering iron. Therefore, the heat generated by such a soldering iron often causes damage to the light emitting element, and it has been difficult to solder the light emitting element (1) without damaging it.

Purpose of the Invention In view of the above-mentioned conventional problems, an object of the present invention is to provide an optical module for optical communication in which the light receiving element 4 or the light emitting element can be fixed to the module main body without being damaged by the heat of solder. do.

Structure of the Invention For this purpose, the present invention provides a fixing ring that fixes the light-receiving element or the light-emitting element, and this fixing ring is screwed onto the module body, and the light-receiving element or the light-emitting element is soldered to the fixing ring with a small heat capacity. This provides an optical module that prevents damage due to heat.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be explained with reference to FIG. 3 and the whistle 41. The 31st M+ is the real sister θ·1i of the light emitting module. This light emitting module Q]+ has a light emitting element (1
2), Fixing ring (1B!, Module body 4),
It consists of a rod lens μs, a receptacle α6I, etc., and the rod lens Oh) is fixed to the module body α4+ with a coupling agent (19), and the light emitting element (receptacle is soldered).
The fixing ring 03) is attached to the module water body 04) K92N, and the module body (14J is screwed to the receptacle α6). Then, by inserting the optical fiber (+8) and the fixed core (11υ) into the receptacle (16), the optical fiber is bent with the optical fiber μs and rod lens (]5 aligned) and the light emitting module. Qll is connected, and the light emitted from the light emitting element is focused by the rod lens (To) and then enters the optical fiber (1B).

It takes 12t to assemble the light emitting module 01), ηJ2
After measuring the distance A% B between the light emitting element, rod lens, and optical fiber in the system of Hidden 1, insert the rod lens μs) into the module body 0, and make sure that the cone from the optical fiber (18) is B. Rod lens (toughness f's -
After doing J and f, fix it with adhesive (]] 9, then screw the fixing ring (]] 3 onto the module body 04.) and assemble it, and use this fixing ring to fix the light emitting element (]] 2. (18
1, adjust the position so that the distance from the rod lens (B) is 8, and then fix it with the half IJ3 (A)). At this time, it is necessary to heat the fixing ring with a soldering iron in order to solder it to the fixing ring (03).
Since the solder does not have a large volume, it has a small heat capacity. Therefore, the fixing ring 03) can be soldered by heating with a soldering iron for a relatively short period of time, and the light emitting element (03) can be soldered.
The frame can be fixed with solder (A).

FIG. 4 shows an embodiment of the light receiving module (21),
) is the light receiving element. In this example, for the light emitting module Q],+ in the third section, the light emitting element (+2) is changed to the light receiving element μ)K, and the other components are the same, so the same reference is made. They are numbered and their explanations are omitted.

Effects of the Invention According to the original communication optical module of the present invention, as is clear from the above description, by interposing a fixing ring between the module body and the light receiving element or the light emitting element, slight heating of the solder can be avoided. The fixing ring can be heated with the fixing ring, and the light-receiving element or the light-emitting element can be fixed to the module body via the fixing ring without being susceptible to damage due to heat.

[Brief explanation of the drawing]

Fig. 1 is a vertical view of a conventional optical module, Fig. 2 is an explanatory diagram of the positional relationship between a light emitting element, a rod lens, and an optical fiber, and Fig. 3 is a longitudinal view of an embodiment of a light emitting module according to the present invention. 1 and 4 are longitudinal sectional views of one embodiment of the light receiving module according to the present invention. 0 sword is the light emitting module, (121 is the light emitting element, q3) is the fixed ring, (!4 is the module water body, (15 no halon lens, (2) Noni half tB, (zl is the light receiving module, (4) is Patent Applicant's Agent No. 1 Figure 2 and 31 ζFS 3 Figure 4 Figure 4

Claims (1)

[Claims] A light 11 is provided with a fixing ring for fixing the light receiving element or the light emitting element, and this fixing ring is screwed 7fi into one module water.
11 trust optical module.