JPS6365925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical switch device, particularly an optical switch device that obtains a plurality of pieces of switching information by encoding a combination of a plurality of optical signals having different wavelengths, and its main purpose is to By arranging most of the components in the same casing to form a unit, improving optical axis accuracy and shortening the optical path, we have provided a compact optical switch device with low attenuation. be.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIGS. The signal is split into three optical signals having different wavelengths by a plurality of dichroic mirrors 4, 5, and 6 (three in the figure), and is output to the mixer 7 side. On the other hand, two shutter plates 8,
By relatively moving 9, three types of optical signals from the demultiplexer 3 are selectively transmitted to the mixer 7 side,
The transmitted optical signals are reflected by the corresponding dichroic mirrors 10, 11, and 12 of the mixer 7, mixed, and guided to the optical fiber 14 via the condenser lens 13. Therefore, by combining optical signals of three types of wavelengths, it is possible to obtain up to eight types of encoded switching information.

The collimating lens 2, the splitter 3, the two shutter plates 8, 9, the mixer 7, and the condenser lens 13
includes a storage frame 15, a cover 16 that closes the open end of the storage frame 15, and a cover 16 that closes the storage frame 15.
It is housed and arranged in a casing 18 consisting of a pressing plate 17 that is pressed against the casing 18.

In FIGS. 3, 4, and 5, the storage frame 15 is basically a rectangular block that is long in one direction, and is opened in the bottom surface 19 at the center in the axial direction and extends in the longitudinal direction. An extending storage hole 20 is bored. Further, a pair of recesses 21 and 22 are bored in the longitudinal center of the bottom surface 19, communicating with the storage hole 20 and extending outward from the storage hole 20 in the right angle direction. A pair of fitting grooves 23 and 24 opening into the hole 20 are formed on both sides of the storage frame 15 so as to face each other. Furthermore, storage hole 2
0, that is, the upper part of the storage frame 15, locking protrusions 25 and 26 are provided to protrude along the side edges of the storage hole 20. A guide hole 27 communicating with the storage hole 20 is bored in the upper part of the storage frame 15 along the longitudinal direction of the storage hole 20.

The press plate 17 is formed in a rectangular shape that can fit into both the recesses 21 and 22, and the cover 16 is attached to the storage frame 15.
By closely contacting and fixing the press plate 17 to the bottom surface 19 of the cover 16, the press plate 17 is held between the cover 16 and the bottoms of both recesses 21 and 22. The press plate 17 also includes a duplexer 3 and a mixer 7 that are fitted into the fitting grooves 23 and 24.
Holding holes 28 and 29 are bored corresponding to the
The collimating lens 2 is inserted into those holding holes 28 and 29.
and a condenser lens 13 are respectively fitted, and both lenses 2 and 13 are held under pressure by a cover 16.

Referring also to FIG. 6, the cover 16 includes a flat plate portion 32 that is in close contact with the bottom surface 19 of the storage frame 15, and a rectangular portion that protrudes toward the side opposite to the storage frame 15 at the longitudinal center of the flat plate portion 32. Fitting cylinder part 33 and fitting cylinder part 3
It consists of a pair of engaging portions 34 and 35 protruding from a flat plate portion 32 on both sides of 3. Four insertion holes 36 and 37 are formed in the cover 16 and the storage frame 15, respectively, and a nut 39 is screwed into the screw member 38 inserted into each insertion hole 36 and 37 and tightened. , the cover 16 is fixed to the storage frame 15. Further, the flat plate part 32 has the collimating lens 2 and the condensing lens 13 inside the fitting cylinder part 33.
Through holes 40 and 41 are bored at positions corresponding to .

The duplexer 3 includes a prism assembly 42 in which three prisms are fixed by adhesive or mechanical means.
Three dichroic mirrors 4 on each joint surface of
5 and 6, and is fitted into the fitting groove 23 of the storage frame 15 and pressed and held by the pressing plate 17. When fitted and held in the fitting groove 23 in this way, each dichroic mirror 4,
5 and 6 are for the optical path from collimating lens 2
The dichroic mirrors 4, 5, and 6 are arranged parallel to each other and inclined at 45 degrees, and the direction of inclination of the dichroic mirrors 4, 5, and 6 is set such that as they move away from the collimating lens 2, they approach the mixer 7 side. Also,
Each of the dichroic mirrors 4, 5, and 6 has the function of reflecting light of different wavelengths and transmitting light of other wavelengths. For example, dichroic mirror 4 reflects light with wavelength λ1, dichroic mirror 5 reflects light with wavelength λ2, and dichroic mirror 6 reflects light with wavelength λ3.

Like the splitter 3, the mixer 7 includes three dichroic mirrors 10, 11, 12 on each joint surface of a prism assembly 43 made up of three fixed prisms.
The fitting groove 24 of the storage frame 15
and is pressed by the pressing plate 17,
Retained. The dichroic mirrors 10, 11, 12 of the mixer 7 are arranged parallel to each other and inclined at 90 degrees with respect to the dichroic mirrors 4, 5, 6 of the splitter 3. Moreover, the dichroic mirror 10 has the function of reflecting light of wavelength λ1, the dichroic mirror 11 reflects the light of wavelength λ2, and the dichroic mirror 12 has the function of reflecting light of wavelength λ3. Therefore, the light reflected from each dichroic mirror 4, 5, 6 of the demultiplexer 3 and reaching the mixer 7 is transmitted to the corresponding dichroic mirror 10, 1.
1 and 12, and is guided to a condenser lens 13.

Referring also to FIG. 7, two shutter plates 8 and 9 are arranged between the duplexer 3 and the mixer 7 so as to be relatively movable. That is, both prism aggregates 4
A shutter plate holder 68 is interposed between 2 and 43, and the pair of shutter plates 8 and 9 are held relatively movably by this shutter plate holder 68. Moreover, there is a spacer 6 between both shutter plates 8 and 9.
9 is interposed. The shutter plate holder 68 and the spacer 69 are each provided with a through hole for allowing light to pass between the corresponding dichroic mirrors 6, 12; 5, 11; 4, 10. Further, drive rods 46 and 47 integrally fixed to each shutter plate 8 and 9 protrude outward from the guide hole 27 of the storage frame 15.
By operating 47 outside the storage frame 15, both shutter plates 8 and 9 can be moved relative to each other.

Each shutter plate 8, 9 has a light transmission hole 48, a 49, 50 are perforated, and each light transmission hole 4 of both shutter plates 8, 9
By combining 8, 49, 50, the duplexer 3
Three types of wavelengths λ1, λ that can be transmitted to the mixer 7 from
2, λ3 can be selected. A maximum of eight combinations of such optical signals having three types of wavelengths λ1, λ2, and λ3 can be created, and therefore eight types of encoded switching information can be obtained.

In FIG. 8, a coupler 51 is fitted into the fitting cylindrical portion 33 of the cover 16. As shown in FIG. Moreover, a pair of flexible arms 52 integrally protrude from both sides of the coupler 51,
53 are provided with locking claws 54 and 55, respectively, and by engaging the locking claws 54 and 55 with the engaging parts 34 and 35 of the cover 16, the coupler 51 is inserted into the fitting cylinder part 33. The fitted state is maintained.

A pair of insertion holes 56 and 57 are bored in the coupler 51 in parallel.
Holes 58 and 59 corresponding to the through holes 40 and 41 of the cover 16 are bored in the bottom of the cover 16, respectively. Furthermore, engagement holes 60 and 61 are formed in both sides of the coupler 51, respectively. Both insertion holes 56, 5 of this coupler 51
7 and holes 58, 59 are filled with phenols 62, 6 connected to the ends of the pair of optical fibers 1, 14.
3 are inserted respectively. The phenol 62,6
A holding member 64 that abuts the rear end of the insertion holes 56 and 57 and closes the open ends of the insertion holes 56 and 57 has a pair of locking claws 6.
5 and 66 are provided in a protruding manner, and these locking claws 65 and 66 are inserted into the engagement holes 60 and 61 by a spring 7.
The phenols 62 and 63 are prevented from coming out of the coupler 51 by being locked by the elastic forces of the phenols 62 and 72, respectively. Moreover, since the holding member 64 is spread out in a tupular shape, the optical fibers 1, 1
The bending of the optical fibers 4 can be made gentler, and breakage of the optical fibers 1 and 14 can be prevented as much as possible.

Next, to explain the operation of this embodiment, an optical signal that enters the demultiplexer 3 from one optical fiber 1 via the phenol 62 and the collimating lens 2 is demultiplexed into wavelengths λ1, λ2, and λ3, and mixed. The light is emitted to the vessel 7 side. Here, by adjusting the relative positions of the two shutter plates 8 and 9, transmission of each wavelength λ1, λ2, and λ3 to the mixer 7 side is selected, and the encoded optical signal is mixed by the selection. Mixed in vessel 7. The mixed optical signal is focused by the condensing lens 13 and further transmitted to the optical fiber 14 via the phenol 63.
The switching information is transmitted to the desired circuit.

As described above, according to the present invention, there is provided a demultiplexer comprising a plurality of dichroic mirrors that are parallel to each other and inclined at 45 degrees with respect to the direction of incidence of an optical signal, and an optical signal parallel to the demultiplexer. a collimating lens for input; a mixer comprising a plurality of other dichroic mirrors tilted at 90 degrees to each dichroic mirror of the splitter and parallel to each other; and parallel light from the mixer. A condensing lens for concentrating and emitting signals, and multiple light transmission holes that are movably interposed between the demultiplexer and mixer and allow selective transmission of optical signals from the demultiplexer to the mixer. Since the shutter plate having the same structure as the one shown in FIG. Become. Further, since a pair of optical fibers corresponding to the collimating lens and the condensing lens are connected to the coupler that is detachably attached to the casing, the optical fibers are not directly extended from the casing, and the optical fibers are not directly extended from the casing. This improves mounting workability and prevents optical fiber breakage during mounting.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the entire structure, FIG. 2 is a right side view thereof, FIG. 3 is a plan view of the storage frame shown in FIG. 1, and FIG. is the third
Figure 5 is a bottom view of Figure 4,
Figure 6 is a bottom view of the cover, Figure 7 is the same as Figure 1.
8 is a sectional view taken along the line -- of FIG. 1. 1, 14... Optical fiber, 2... Collimating lens, 3... Demultiplexer, 4, 5, 6, 10, 11, 12
...Dichroitsch mirror, 7...Mixer, 8,9...
Shutter plate, 13...Condenser lens, 18...Casing, 48, 49...Light transmission hole, 51...Coupler.

Claims (1)

[Claims] 1. A demultiplexer consisting of a plurality of dichroic mirrors tilted at 45 degrees with respect to the direction of incidence of the optical signal and parallel to each other; a collimating lens for inputting parallel optical signals to the demultiplexer; A mixer consisting of a plurality of other dichroic mirrors tilted 90 degrees to each dichroic mirror of the demultiplexer and parallel to each other, and a concentrator for concentrating and outputting the parallel optical signals from the mixer. An optical lens and a shutter plate movably interposed between the demultiplexer and the mixer and having a plurality of light transmission holes that allow selective transmission of optical signals from the demultiplexer to the mixer are installed in the casing. placed in
An optical switch device characterized in that a pair of optical fibers corresponding to the collimating lens and the condensing lens are connected to a coupler that is detachably attached to the casing.