JPH03189602A - Light beam controller - Google Patents

Abstract

PURPOSE:To realize the optical interconnection device which outputs the parallel incident light rays in input in the state of collimated beams of light and has no power losses by combining optical separating and synthesizing means which separate N-pieces of beams to N/2-pieces each of the beams and corrugated reflecting means. CONSTITUTION:A V-shaped mirror M2 has two reflecting surfaces m2-1 and m2-2 and 8 pieces of the parallel input light beams 1 to 8 are separated to 2 sets of 4 pieces each. The respective separated beams 1 to 4 and 5 to 8 are respectively reflected by the mirrors M3, M5 and the mirrors M4, M6 and are made incident on the corrugated mirror M1. The corrugated mirror M1 is alternately disposed with the reflecting surfaces m1-1 of the 1st group and the reflecting surfaces m1-2 of the 2nd group. The reflecting surfaces of the respective groups are respectively parallel with each other. The respective incident light beams 1 to 4 and 5 to 8 on the corrugated mirror m1 are reflected by the reflecting surfaces of the respective groups and the output light beams thereof are parallel with the input light beams and are the light beams which perfectly shuffle the incident light beams.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to optical beam control that performs optical interconnection between elements in a parallel processing device by taking advantage of optical non-induction, non-coherence, and parallelism. It is related to the device.

<Prior art> With the development of VLSI technology, circuit elements have become denser, and as a result, connections between integrated circuit elements have increased! Not only the amount of illumination, but also the amount of interconnections between chips, boards, and even modules has increased, and at the same time, various problems such as signal propagation delay and mutual induction of signal lines are occurring. As a result, a situation is emerging in which system performance is determined not by the devices themselves, but by the interconnection technology between the devices.

In order to solve the problem of interconnection between elements, optical interconnection (optical interconnection) technology, which utilizes the high speed, parallelism, and non-coherence of light, has recently been actively researched. has been done.

A perfect shuffle network is a structure of a coupling network for a multiprocessor system or a pipelined optical parallel operation.

Various application examples have been developed as parallel operations using this perfect shuffle network, such as FFT (fast Fourier transform), sorting, and matrix transposition. Therefore, several methods have been conventionally proposed for realizing this Perfect Shuffle Interconnection Network (hereinafter abbreviated as PSN) using light.

Figure 6 shows the PSN when the number of input and output elements N is 8.
It is a conceptual diagram. In this case, input No. 1 is output to No. 1, input No. 2 is output to No. 3, input No. 3 is output to No. 5, and so on.

In general, when the number of inputs and outputs is N, if the number k (k is greater than or equal to 0 and less than N) input is output to the number ',' is given by the following equation.

FIG. 7 shows a first conventional example (N=8).

The input light beams 1 to 8 are deflected into the first half N/2 and the second half N/2 in different directions by prisms 21 and 22 placed on the focal plane of the lens 23, and then pass through the lens 23. Thereafter, the light enters prisms 24 and 25 placed on the focal plane of lenses 23 and 26. Each light beam is again deflected by prisms 24 , 25 and passes through lens 26 . At this time, if the optical system is appropriately designed, the output light beam will be a perfectly shuffled input beam at the focal plane of the lens 26.

FIG. 8 shows a second conventional example. The optical system is the same as the optical needle of a Michelson interferometer, and input light is split into two by a beam splitter 34, reflected by tilted mirrors 31 and 32, and output. At this time, the mirrors 31 and 32 are appropriately tilted so that the two divided output lights overlap as shown in FIG. 8, so that the output light is the perfect shuffled version of the input light.

<Problems to be Solved by the Invention> However, in the above conventional example, the lights that are parallel to each other at the input are not parallel at the output. The conventional example has a drawback in that it is difficult to use the output light only on a surface 4 Dill away from the lens 33 as an input to the next optical system. Generally, PSNs are connected in series in multiple stages and used, but in the conventional method, it was difficult to use a PSN as an input for the next PSN, and therefore it was unsuitable for use in multiple stages.

Furthermore, the second conventional example has the disadvantage that half of the input optical power is not used as output, resulting in very large power loss.

The present invention has been made in view of the above circumstances, and its purpose is to provide a PSN in which light incident in parallel at the input is output as a parallel beam at the output, and there is no power quadrature in principle. An object of the present invention is to provide an optical interconnection device that can also be used.

<! ! ! ! Means for Solving the Problem> In order to achieve the above object, the present invention provides an optical beam splitting device that separates N beams into N/2 beams each. Separation/synthesis means,
A wavy reflecting means that reflects two groups of beams incident from different directions in the same direction by arranging opposing bodies with the same inclination every other time in a sawtooth wave shape, and an optical separation/reflection means. The present invention is characterized by comprising an optical system that guides the light beam between the combining means and the wavy reflecting means.

<Function> According to the present invention, the N input light beams are deflected into the first half N/2 and the second half N/2 in different directions by the optical separation/synthesizing means, and are reflected from different directions. The body is incident on a wavy reflecting means, which is a reflector play, in which every other part of the body is arranged in a sawtooth waveform with the same inclination. At this time, if the angle of the reflector is appropriately designed, the light beams incident from different directions will be reflected in the same direction so that they fall between the other light beams, resulting in a perfect shuffle of the input light beams. , and is output as parallel light.

Embodiments FIG. 1 shows a light beam control device according to a first embodiment of the present invention. This light beam control device has eight light beams 1 to 8.
Perfect shuffle. As shown in FIG.
-1 and a second reflective surface m2-2, parallel 8
Input light beams 1-8 of the book are incident.

Of these, the light beams 1 to 4 are reflected by the reflective surface m2-1 to become first light beams 1 to 4, and the light beams 5 to 8 are reflected by the reflective surface m2-2 to become second light beams 5 to 8. So, 8
The light beams 1 to 8 of the book are divided into two groups of four beams each.

The first light beams 1 to 4 are reflected by the mirror M3 and the mirror M5, and are incident on the first group of reflective surfaces m1-1 of the wavy mirror (wavy reflecting means) M1 as the first group of light beams 1 to 4. be done. Similarly, the second light beams 5 to 8 are reflected by the mirrors M4 and M6, and are incident on the second group of reflective surfaces m1-2 of the wavy mirror M1 as the second group of light beams 5 to 8.

As shown in FIG. 2, the wavy mirror M1 is formed by bending a reflector into a sawtooth wave shape, and has a first group of reflective surfaces m1-1 and a second group of reflective surfaces m1-2. are arranged alternately.

Furthermore, the plurality of reflective surfaces m1-1 of the first group are parallel to each other, and the plurality of reflective surfaces m1-2 of the second group are parallel to each other.

Therefore, each light beam 1-4 is individually incident on the reflective surface m1-1 of the first group and reflected to become output light beams 1-4, and each light beam 5-8 is individually incident on the reflective surface m1-1 of the second group. -2 and are reflected to become output light beams 5 to 8. Furthermore, the output light beams 1 to 4 and the output light beams 5 to 8 are parallel to each other, and the output light beams 5 to 8 are located between the output light beams 1 to 4. Thus, the output light beam is a perfect shuffle of the input light beam. That is, the array of light beams is lp 2,3p 'p ''p ''p7 on the input side.
．． 8, on the output side it is 1.5°2.6,3,
7, 4, 8, and a perfect shuffle is executed. Moreover, the input light beam and the output light beam are parallel.

FIG. 3 shows a light beam control device according to a second embodiment of the present invention, which perfectly shuffles eight light beams. This embodiment device has a rippled mirror M12, a wavy mirror Mll, a mirror M13 . M14. M15° Ml6, lenses Ll, L2. L3. This is an addition of L4. That is, in the first embodiment, the interval between the output light beams was twice the interval between the input light beams. Therefore, in the second embodiment, the input light beam interval is doubled by the set of lenses L3 and Ll and lenses L4 and L2, so that the input light beam and the output light beam have the same beam interval. There, the light beam 1 inputted to the toothed mirror M2
~8 are divided into two, 1 to 4 and 5 to 8, respectively, and reflected by mirrors M13 and M14, and reflected by lens L.
3. The input light beam spacing is doubled by the set of Ll and lenses L4 and L2, which is further reflected by mirrors M5 and M6 and enters the wavy mirror Mll. The light beams reflected by the wavy mirror M1 are parallel to each other and are perfectly aligned with the input light beam.

FIG. 4 shows a light beam control device according to a third embodiment of the present invention. This device separates eight light beams into odd-numbered light beams and even-numbered light beams counting the input beam from the end. This device has the input and output of the first embodiment interchanged. The light beams 1 to 8 incident on the wavy mirror M1 are reflected in different directions by the even-numbered and odd-numbered light beams, are reflected by the mirrors M3, M4, M5, and M6, and are reflected and combined by the toothed mirror M2. They are parallel to each other and the input beam is divided into odd and even beams.

FIG. 5 shows a light beam control device according to a fourth embodiment of the present invention, in which eight light beams are divided into odd-numbered light beams and even-numbered light beams counting from the end of the input beam. This is a device that separates the In this device, the input and output of the second embodiment are swapped, so that the input and output light beam intervals are the same as in the second embodiment.

As described above, the first to fourth embodiments are optical connections for perfect shuffle for a one-dimensional beam array, but optical connections for perfect shuffle, etc. for a two-dimensional beam array can also be performed using the apparatus of the embodiment according to the present invention. 9
This is possible by combining the device rotated by 0 degrees with the original device.

<Effects of the Invention> As explained above, according to the present invention, it is possible to perform optical interconnection using the parallelism and non-coherence of light, and the light incident in parallel at the input becomes a parallel beam at the output. Since the signal is output as is and there is little power loss, it is possible to construct a large-capacity, multi-stage PSN.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a first embodiment of the present invention, Fig. 2 is a block diagram showing a wavy mirror, Fig. 3 is a block diagram showing a second embodiment of the present invention, and Fig. 4 is a block diagram showing a wavy mirror. A configuration diagram showing a third embodiment of the invention, FIG. 5 is a configuration diagram showing a fourth embodiment of the invention,
FIG. 6 is a conceptual diagram showing a perfect shirt full network, FIG. 7 is a configuration diagram showing a first conventional example, and FIG. 8 is an explanatory diagram showing a second conventional example. In the drawings, Ml and Mll are wavy mirrors, M2, Ml2 are foil mirrors, M3, M4, M5, M6,
Ml3, Ml4, Ml5, and Ml6 are mirrors Ll, and L2, L3, and L4 are lenses.

Claims (1)

[Scope of Claims] A plurality of mutually parallel first group reflecting surfaces and a plurality of mutually parallel second group reflecting surfaces having different angles from the first group reflecting surfaces. When a plurality of parallel light beams are incident, the plurality of parallel light beams of the first group reflected by the reflection surface of the first group and the reflection surface of the second group are arranged alternately. On the other hand, when the first and second groups of light beams do not travel in opposite directions along the above-mentioned optical path, these light beams are separated into a plurality of parallel light beams of the second group reflected by It has a wavy reflecting means that reflects on the reflecting surfaces of the group and the second group into mutually parallel light beams, and a first reflecting surface and a second reflecting surface, and receives a plurality of parallel light beams. Then, the first plurality of light beams reflected by the first reflecting surface and the second plurality of light beams reflected by the second reflecting surface are separated, while the first plurality of light beams are separated along the above optical path.
and a light separating/combining means for reflecting the light beams on the first and second reflecting surfaces to form mutually parallel light beams when the second light beam travels in the opposite direction; The first light beam reflected by the first reflecting surface is guided to be incident on the first group of reflecting surfaces of the wavy reflecting means as a first group of light beams, or conversely, the first light beam of the wavy reflecting means is reflected by the first group of reflecting surfaces of the wavy reflecting means. The first group of light beams reflected by the surface is guided to the first light separating/combining means.
an optical system that directs a second light beam reflected by a second reflecting surface of the light separating/combining means to a reflecting surface of a second group of wavy reflecting means; The light beams may be incident as two groups of light beams, or conversely, the second group of light beams may be incident as two groups of light beams.
an optical system that guides the second group of light beams reflected by the group's reflective surfaces and enters the second group of light beams as a second light beam into the second reflective surface of the light separation/synthesizing means; Control device.