JPH012007A - optical parts - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical component having an optical film on the end face of a ferrule containing an optical fiber.

[Conventional technology]

As shown in FIG. 3, this type of optical component that has been proposed in the past consists of bonding a glass block 4 with an optical film 3 deposited on the end face of a ferrule 2 containing an optical fiber 1, using an adhesive that also serves as a matting agent. The structure was fixed by agent 5.

Figure 4 shows the ferrule 2 (
2a, 2b) and a lens 6 (6a, 6b). FIG. In FIG. 4, light emitted from a ferrule 2a containing an optical fiber 1 passes through a glass block 4 and is converted into parallel light by a lens 6a. This parallel light passes through the optical passive element 7, and after some or all of the light is attenuated by reflection or absorption, it enters the lens 6b. The parallel light incident on the lens 6b is converged, passes through the glass block 8, and enters the ferrule 2b containing the optical fiber 1.

In the figure, a glass block 4.9 is bonded with an adhesive 1 having a matching effect in order to reduce Fresnel reflection at the end face of the optical fiber 1 and the end faces of the lenses 5a and 6b.
0.11 between the optical fiber 1 and the lenses 6a and 6b, and at the same time, an antireflection film 12 and 13 is deposited on the opposite surface of the lenses 5a and ib.
As the optical passive element 7, a filter on which various dielectric materials or metals are deposited is often used = [Problem to be solved by the invention] The conventional optical component described above has a glass block on the end face of the ferrule 2as 2b. 4.9 and lenses (3a.

6b is fixed with adhesive 1O111 that also serves as a matting agent, so adhesive 10.11 may peel off due to differences in thermal expansion coefficients of the materials due to environmental temperature changes, or may deteriorate due to optical damage. The drawback was that the characteristics changed.

[Means for solving problems]

In the optical component according to the present invention, an optical fiber wire is housed in a ferrule, the end face of the ferrule is mirror-finished, and an optical film is formed by vapor deposition.

[Effect]

As described above, the optical component according to the present invention uses a ferrule that contains an optical fiber and has an optical film deposited on its end face, so there is no need to use a matching agent or adhesive at all. Therefore, optical components with excellent environmental resistance can be manufactured.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIG. 1 is a diagram showing an embodiment of an optical component according to the present invention. An optical fiber 16 is housed inside the ferrule 14 via an adhesive 15.

Further, the end face 14a of the ferrule 14 is connected to the optical fiber 1
6 is adhesively fixed inside, it is polished to a mirror surface using an optical polisher, and then an optical film 17 is formed on this end surface 14a. The ferrule 14 is made of metal, ceramic, glass, or a composite thereof, with fine through holes provided therein. Also, adhesive 1
As No. 5, a two-component engineered poxy adhesive is generally used. Furthermore, the optical film 17 employs a single-layer or multi-layer dielectric film and metal film formed by vacuum deposition, ion blasting, sputtering, or the like.

Now, FIG. 2 shows an example of the configuration of an optical passive component to which the above-mentioned optical component is applied. In the same figure, optical fiber strand 16
The light emitted from the ferrule 14 containing the
8 and is converted into parallel light by a lens 19. This parallel light passes through the optical passive element 20, and after some or all of the light is attenuated by reflection or absorption, it enters the lens 21.

The parallel light incident on this lens 21 is converged into the cavity 22
After passing through, the light enters a ferrule 24 containing an optical fiber 23. .

In addition, the end face of the optical fiber 16.23 and the lens 1
In order to reduce Fresnel reflection on the end face of the ferrule 14.24, an optical film 17 is provided on the end face of the ferrule 14.24.
An anti-reflection film 25 is deposited on the end face of 1. For this reason, the structure is such that there is no matching part made of adhesive.

〔Effect of the invention〕

As explained above, the optical component according to the present invention has a built-in optical fiber and uses a ferrule with an optical film deposited on its end face, so there is no need to use a matting agent or adhesive at all. became. Therefore, it is possible to provide an optical component with extremely excellent environmental resistance.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the optical component according to the present invention, FIG. 2 is a configuration diagram of an optical passive component to which the optical component of the present invention is applied, and FIG. 3 is an example of a conventional optical component. The longitudinal sectional view shown in FIG. 4 is a configuration diagram of an optical passive component to which conventional optical components are applied. 14.24... Ferrule, 14a... End face, 16.23... Optical fiber strand, 17...
...Optical film. Applicant: NEC Corporation

Claims (1)

[Claims] An optical component characterized by incorporating an optical fiber wire into a ferrule, mirror-finishing the end face of the ferrule, and forming an optical film by vapor deposition.