JPH01246511A - Optical circuit parts - Google Patents

Abstract

PURPOSE:To fix optical parts with sufficient strength onto a substrate and to obtain the optical circuit parts which are stable to ambient environment by fixing a cap member formed with a recess in a prescribed position by solder or adhesive agents onto the substrate on which the optical parts are mounted in such a manner as to seal the optical parts. CONSTITUTION:Optical fibers 1a, 1b, 1c and the optical parts 2-5 are so positioned with high accuracy that the fibers and the parts are optically coupled to each other. The fibers and parts are then fixed onto the substrate 7 by, for example, the solder 6. The cap member 8 formed with the recess 9 in the prescribed position is then fixed by the solder 6' in such a manner as to seal the sticking surfaces of the optical parts and the substrate for positioning. Since the fixing by using the entire circumference of the optical parts is thereby enabled, the sufficient fixing strength is assured and since the space to allow transmission of rays and air is closed by the solder 6, 6', the deterioration of the optical coupling by moisture and dust is averted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Application of M Tojo) This invention relates to an optical circuit component used in optical 7-aipa communication and the like.

(Prior Art) As optical circuit components used in optical fiber communications become more practical, demands for smaller size and lower cost are increasing.

Photosensitive glass, which can be processed with high precision using photolithography technology, is an optical lens that makes up optical circuits.

It is used as an optical element mounting board that allows precise positioning of optical elements such as optical fibers and prisms without any adjustment, making it possible to assemble optical circuit components without adjustment and helping to reduce costs.

8 to 10 are a plan view, a sectional view, and a partial sectional view showing a conventional example of an optical multiplexer/demultiplexer using a photosensitive glass substrate. Original fiber la, lb, IC and optical lens 2a,
Optical fiber collimator 3a in which 2b and 2C are integrated
1 3b, 3G, and a glass prism 5 having a dielectric multilayer film 4 are placed without adjustment on a positioning @ 11 formed on a photosensitive glass substrate 14 and fixed with solder 6. The light is emitted from the optical fiber 1a and passes through the optical lens 2a.
It is converted into parallel light by nine wavelengths λ1. The light of λ2 is separated by the dielectric multilayer film 4 and coupled to the optical fiber collimators 3c and 3b, respectively.

According to this configuration, if the outer diameter of the collimator and the glass prism are made with a sufficient dimension fR degree, the positioning groove 1
1 can be processed on the μm order, so just by placing each part on the groove, sufficient optical coupling of 7 optical components can be obtained, and there is no RJ! It had the advantage of being assembled in four steps.

However, since the positioning substrate and the collimator are fixed only at a portion of the lower part of the collimator, the fixing strength is weak, and there are also disadvantages in that vertical positional deviation occurs due to thermal expansion of the solder.

Furthermore, in such a structure, since the optical components are exposed to the outside air, the optical input/output surfaces of the optical components are contaminated by dust in the outside air and are affected by humidity, resulting in a deterioration in coupling efficiency.

(Problems to be Solved by the Invention) Conventional optical circuit components in which optical components are fixed on a substrate have the problem that only a portion of the optical component is held on the substrate, resulting in insufficient fixing strength. There is a problem in that the light input/output surface of the optical component is affected by the surrounding environment.

An object of the present invention is to provide an optical circuit component that fixes an optical component on a substrate with sufficient strength and is stable against the surrounding environment.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a lid member having a recess formed at a predetermined position on a glass or ceramic substrate on which an optical component is mounted.
Optical components are fixed and integrated using solder or adhesive.

(Function) According to the optical circuit component according to the present invention, since the optical component mounted on the substrate is strongly fixed to the recess of the lid member, sufficient fixing strength can be ensured.

In addition, the space where the light beam passes through the air is a positioning board,
When optical components and lid members are sealed with solder, they are shielded from the outside by rounding, and dust from the surrounding area adheres to the optical component's light input/output surface, resulting in deterioration in coupling efficiency.
It becomes possible to avoid the influence of humidity.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
.

1 to 3 are diagrams for explaining a first embodiment of the present invention. Optical fiber la, lb, IC,! : Optical fiber collimators 3a, 3b, 3C with integrated optical lenses 2a, 2b, 2C and a glass prism 5 having a dielectric multilayer film 4 are positioned with high precision so as to be optically coupled to each other, and placed on a substrate 7. It is fixed with solder 6. The lid member 8 having a recess 9 formed at a predetermined position is fixed by solder d so as to seal the bonding surface of the optical component and the positioning board), an optical fiber collimator, and a board. , the lid member is integrated.

According to such a configuration, the collimators 3a, 3b, 3c
Since the entire circumference can be used for fixing, sufficient fixing strength can be ensured, and axial misalignment caused by solder creep after assembly can be prevented. Also, solder 6, 6. ”
Since the space through which the light beam passes through the air is closed, deterioration of optical coupling due to humidity and dust can be avoided. Furthermore, if the melting point of the solder 6 for fixing the optical component and the substrate 7 is higher than that of the solder 6 for fixing the lid member 8, the lid member 8 can be fixed after positioning and fixing the optical component. , each can be assembled in separate processes, making manufacturing easier.

4 to 6 are diagrams for explaining a second embodiment of the present invention, in which a photosensitive glass substrate 10 on which positioning grooves are formed is used as the substrate. The glass prism 5 having the optical fiber collimators 3a, 3b, 3c whose axes have been aligned in advance and the dielectric multilayer film 4 is placed on the W#11 formed on the positioning substrate 10 so as to be optically coupled to each other. If this groove 11 is formed with sufficient accuracy, the optical axes between the optical components can be made to coincide with each other simply by installing the optical components.

FIG. 7 is a diagram showing a third embodiment of the present invention, in which a light-receiving element collimator 12 having built-in optical lenses 2b and 2c instead of the optical fiber collimators 3b and 3c in FIGS. 4 to 6, and a light-emitting element This is an example of an optical multiplexing/demultiplexing module using a collimator 13.

〔Effect of the invention〕

By using the present invention, there is an advantage that the optical component can have sufficient strength and is stable against the surrounding environment.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a sectional view of the main part of Fig. 1, and Fig. 4 shows another embodiment of the invention. 5 is a sectional view of FIG. 4, FIG. 6 is a sectional view of a main part of FIG. 4, FIG. 7 is a plan view of another embodiment of the present invention, and FIG. 8 is a conventional example. 9 is a sectional view of FIG. 8, and FIG. 10 is a sectional view of a main part of FIG. 8. 7, 10.14...Glass or ceramic substrate 11...Positioning groove 8...Lid member 6.6°...Patent attorney representing Handa Noriyuki Ken Yudo Mitsuyuki Matsuyama Figure 1' / Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 9

Claims (4)

[Claims] (1) An optical component, a glass or ceramic substrate on which the optical component is mounted, and a lid member in which only a portion holding the optical component is processed into a concave shape, and the optical component, the substrate, and the lid member are An optical circuit component characterized by being integrated and fixed. (2) The optical circuit component according to claim 1, wherein a groove is formed in the glass or ceramic substrate to regulate the position of the optical component. (3) The optical component, the substrate, and the lid member are integrally fixed by solder or adhesive, and the fixing surface of the substrate and the lid member is filled with solder or adhesive. The optical circuit component according to claim 1. (4) The optical circuit component according to claim 1, wherein the melting point of the solder used to fix the substrate and the optical component is higher than the melting point of the solder that fixes the lid member and the positioning substrate. (5) The optical component according to claim 1, wherein the optical component is an optical fiber integrated with an optical lens, an optical semiconductor element, an optical multiplexer/demultiplexer, or a combination of a plurality of these. circuit parts.