JPS5821224A - Forming method for optical transmission line - Google Patents

Abstract

PURPOSE:To simplify the branching, synthesizing or switching of light by previously connecting a means to colimate optical beams through a colimating lens on the way of an optical transmission line and inserting a parts having a light branching, synthesizing or switching function into the means. CONSTITUTION:An optical plug socket colimates the light from an optical fiber 1 through a colimating lens 2, reflects the parallel beam through a prism 3 and collects the reflected light through a colimating lens 2'' to form an optical path coupled with an optical fiber 1'. When an expanding terminal 7 is to be connected to the optical plug socket, optical connectors 6 are connected to optical fibers 1'', 1''', the connectors 6 are inserted into a case 4 and the prism 3 is removed from the light path by depressing a pushbutton or the like, so that the light from the optical fiber 1 is inputted to the terminal 7 through the colimating lenses 2, 2' and the light from the optical fiber 1''' is connected to the optical fiber 1' through colimating lenses 2''', 2''. In the same manner, light can be easily branched, synthesized or switched.

Description

[Detailed Description of the Invention] The present invention relates to an optical fiber transmission system that can easily branch, combine, switch, demultiplex, and multiplex light, and easily add terminals (stages) and The present invention relates to a method for forming an optical transmission line.

In conventional optical fiber transmission systems, optical circuit components, terminals, etc. are first installed in consideration of expansion, but it may be necessary to add terminals, etc. to locations where such equipment is not available. In this case, conventionally, the optical fiber I was cut on-site, an optical connector was attached, and the connection was made to the terminal, etc. This work was precision work and had the disadvantage of being time-consuming. There was a drawback that it was not possible to test.

In order to eliminate the above-mentioned drawbacks, the purpose of the present invention is to provide a method for forming an optical transmission line that allows light to be easily branched, combined, switched, demultiplexed, and multiplexed just like inserting an electrical branching plug into an electrical outlet. It's on offer.

In order to achieve the above object, the present invention provides a part in advance in which a light beam is made into a parallel beam by a collimating lens in the middle of an optical transmission path, and has a part or parts having the ability to branch, combine, or switch light. This method of forming an optical transmission line is characterized by branching, combining or switching light, and branching and negative waves by inserting components having branching and multiplexing functions.

Embodiments of the present invention will be described below with reference to the drawings.

1II is a configuration diagram of the point where the light beams become parallel (hereinafter referred to as optical condenser A) in the 1st embodiment of the present invention, and 2nd
The figure is a block diagram of the first embodiment of the present invention in which an optical switching component is inserted in order to add a terminal 7 to the location shown in FIG. 111' in Figure 0, which is a configuration diagram with an optical outlet shown in Figure 4.
@1'@1"' is optical fiber, 2e2', 3'
, 2m is a collimating lens, 8 is a prism, 4 is a case, 6 is an optical connector, 8 is a terminal (switching device, node stage cord, etc.), 1G is an optical fiber cable, 7 is an expansion terminal, 9 is Fig. 1 , 9' indicates an optical outlet shown in FIG. 4, which will be explained later.The optical outlet shown in FIG. The light is focused by the optical fiber A (1-), which is connected to the optical fiber A (1-), indicating that it is plugged in. This corresponds to the electric outlet of the electric g1m. When connecting to It, light 7 y ipa x#, 1eal
When the optical connector 6 is connected to the optical connector 6 and inserted into the case 4 as shown in FIG. The light beam 7 should be installed at a position where the light from the eyeper 1'' is coupled to the collimating lens 2'', and the parallel beam of light from the collimating lens 2 is once condensed by the collimating lens 2''. Moreover, the parallel beam of light from collimating lens 2#' is exactly at the position where it can be focused by collimating lens 2'. At this time, the prism 3 is structured so that it can be retracted into the prism with a push button or the like so as not to obstruct the parallel beam of light as shown in FIG. When Eyepar # and III are inserted into the case 4 and the prism 3 is retracted by pushing a button, etc., the light enters the end 17 from the optical fiber 1 via the collimating lens 2.2', and the light 7 from the Eyepar 1'' enters the end 17. The light is coupled to the optical fiber 1' via the collimating lenses g#, s<#.This makes it easy to add terminals 7.The 3rd eIll is an example of an optical transmission line and is a former loop network. The existing terminal 8 is connected in a loop with an optical fiber cable xk.At this point, there are plans to add more terminals in the future.
is set in advance. When you want to add more terminals 7, connect the optical connector 6 connected to the optical fiber 121nt connected to the terminal 7 to the case 4I of the optical outlet A9 as described above.
It can be easily expanded by plugging it in. Of course, the optical outlet A shown in FIG. 1 is covered by a case 4 to prevent interference from the outside. ◎ FIG. The configuration θ of the optical outlet B (referred to as optical outlet B), the fifth
The figure is a configuration diagram of the optical branching/combining or demultiplexing/multiplexing component of the second embodiment of the present invention, and FIG. 6 is the optical branching/combining component or demultiplexing/multiplexing component shown in FIG. FIG. 3 is a configuration diagram with parts attached. In the figure, 11°11', 16 is an optical fiber, 12
．． Reference numerals 12' and 14 indicate collimating lenses; 13 indicates a branching film, a splitting film, a synthetic film, or a combining film; 15 and 16 indicate a case.

As shown in FIG. 4, the light from the optical fiber 11 is turned into a parallel beam by the collimating lens 12, and is condensed again by the collimating lens 12'. Make an outlet B and install it at the position of optical outlet T39' in Figure 3. Optical power source) B
The position 9' is a position necessary for maintenance of the optical transmission line. Fifth
The figure corresponds to an electric plug for an electric outlet, and when branching or splitting light, the optical outlet B in Figure 4 is used.
When inserted as shown in FIG. 6, the parallel beam of light is branched or demultiplexed by a light branching film or a light splitter [13], and then condensed by a collimating lens 14 and coupled to an optical fiber 6. In addition, when combining or multiplexing light, if you insert the parts shown in Figure 5 starting with Figure 96, the light from the optical fiber 16 will be made into a parallel beam through the collimating lens 14, and the light will be converted into a parallel beam by the light combining film or the light combining J113. It is combined or combined with the light from the collimating lens 12 and sent in the direction of the collimating lens 12'.

Therefore, when maintaining the optical transmission line, use the optical outlet shown in Figure 3)
By branching and combining the lights at point B9', testing can be easily performed and maintenance accuracy can be improved.

It goes without saying that cases 15 and 16 are used to protect against interference from the outside.

As explained in detail above, according to the present invention, in the optical transmission line,
Since light can be easily branched, combined, and demultiplexed (waves or switched), it is easy to add terminals, etc., and maintenance accuracy can be improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of the optical component AΦ of the first embodiment of the present invention, and [2111 is #! of the present invention! Fig. 3 is a block diagram showing the optical switching parts inserted in order to add a terminal 7 to the optical outlet in the embodiment of the present invention. Fig. 4 is a block diagram of the optical condenser) H of the second embodiment of the present invention, Fig. 5 is a block diagram of the optical branching, combining, or torrent voice wave components of the second embodiment of the present invention, wterit:t is FIG. 6 is a configuration diagram in which the optical branching/combining or demultiplexing/multiplexing component shown in FIG. 5 is attached to the optical condenser l. In the figure 1.1', 1', F, 11.11', 1
6 is Hikari 7 Aipa, 2.2', 2', 2", 12.12'
, 14 is; remate lens, 3 is prism, 4, 15
．． 16 is the case, 7°8 is the terminal, 9 is the optical outlet person,
9' is the optical outlet Bs, 1o is the optical fiber cable,
Reference numeral 13 indicates a branching film, a splitting film, a composite film, or a multiplexing film. 4m longing 6 agony

Claims (1)

[Claims] 1. A part is provided in advance in the optical transmission path where the light beam becomes a parallel beam using a collimating lens, and a component having a function of branching, negative emitting or switching light is inserted into the above part. A method for forming an optical transmission line, characterized by branching, combining, or switching light. 2. In the middle of the optical transmission path, a collimating lens is used to create a parallel beam of light at a point in advance, and by inserting a component that has the function of splitting and combining light into the above point, the light can be split and combined. A method for forming an optical transmission line characterized by multiplexing.