RU2028675C1 - Optoelectronic commutator - Google Patents

Abstract

FIELD: computer technology. SUBSTANCE: number of active and collapsible elements is reduced, as well as couplings and their lengths are reduced. EFFECT: improved speed of operation. 3 dwg

Description

 The invention relates to the field of computer technology and can be used, for example, for switching a group of storage devices with a group of central processors.

 Known optical switch for memory, closest to the proposed device, containing a group of emitters, fiber optic splitters, fiber optic combiners and groups of photodetectors. The main disadvantages of this device are the relatively small number of connected devices, low speed and the impossibility of simultaneous and independent switching of devices.

 The aim of the invention is to increase the speed of the optocoupler by reducing the number of active and detachable elements and reduce communication.

 Due to the fact that the proposed technical solution, in comparison with the known ones, performs switching, for example, of electronic or other types of devices using fiber-optic methods, and in comparison with the prototype provides a compact design and reduces the relative number of active and detachable elements, as well as the number of connections and their length, significantly Increased speed, reliability, compactness and expand the functionality of the devices.

 In FIG. 1 shows a functional diagram of an optoelectronic switch; in FIG. 2 and 3 are diagrams of an optocoupler switching unit.

 The optoelectronic switch contains 1-1 ... 1-N groups of input optical fibers, each of which consists of 2-1 ... 2-S input optical fibers, 3-1 ... 3-S photoelectric converters, each of which has N inputs and K outputs, 4-1 ... 4-S multiplexers connected to each of S photoelectric converters, 5-1 ... 5-K radiation sources, 6-1 ... 6-K photodetector nodes, 7 -1 ... 7-K groups of output optical fibers with S optical fibers in each, an address bus 8. Each of S photoelectric converters 3 contains a photodetector 9 or 11-1 ... 11-K and 10-1 ... 10- N optical branches Itel.

 The optoelectronic switch operates as follows.

 We suggest that the n (where n = 1, 2, 3 ... N) central processors need to simultaneously and independently commute with K (where K = 1, 2, 3 ... K) memory devices.

 It is assumed that in all the n-th central processors there are groups of radiation sources, each of which contains emitters in an amount, for example, equal to S (where S = 1, 2, 3 ...) of simultaneously transmitted word bits, and each K The e-storage device contains a group of photodetectors, consisting of S photodetectors.

 Considering that the clock cycle of the central processor is usually not less than 4 ns, and the frequency of laser diodes can reach 2 GHz, it is advisable to use temporary information compression in the channels of the interprocess communication and switching system to reduce the amount of equipment. At the same time, suppose that for transmitting a full-sized information word between the processor and the storage device, use (S-1) an information fiber + one fiber for transmitting clock signals (a sync fiber or fiber-optic synchro) and, for example, one fiber for transmitting the address of the Kth storage device, with which it is necessary to establish a connection (address light guide or light guide address bus).

 Information fibers are transmitted through information fibers, for example, each clock cycle without additional time intervals, along the optical fiber clock — sync pulses, and along the optical fiber address bus — a marker pulse (with the necessary lead), which indicates the beginning of the information block, followed by r (where r = 2 , 3, 4 ...) pulses displaying the address of the storage device to which this information block of words should be transmitted.

 Therefore, in an optoelectronic switch, each information channel consists of S optical fibers, and in total there are (S + N) input optical fibers + address bus at the input of the switch, and S x K output optical fibers at the output.

 From each n-th processor, the group S of optical signals is supplied to the corresponding n-th group of input optical fibers 1. Moreover, the simultaneous p-th (where p = 1,2,3, ... S) optical signals from all n-th groups of inputs 1 follow the corresponding input optical fibers 2 to the same p-th photoelectric converter 3. To the same block 3, through the photodetector nodes 6 and multiplexers 4, control signals are received via the address bus, according to which it switches the input information signals. At the same time, the same control signals are supplied to all blocks 3, since all bits of each word must be switched equally. Thus, simultaneously at the same outputs of all switching blocks, corresponding bits of the same information word appear. The optical signals displaying these discharges follow the corresponding output optical fibers 6, are combined into a single group, which displays the corresponding information word on the corresponding Kth output 6. The operation of the optoelectronic switching units is illustrated by the circuits shown in FIG. 2 and 3.

 We only note that the same word category is fed simultaneously to the same inputs of all K multiplexers, and depending on which K-th output of the device we want to receive this word, it is removed from the corresponding S-th multiplexer 4. In this case in FIG. 2, the input word bits are multiplied electrically, and in FIG. 3 - optically (by optical splitters 11).

 Structurally, the optoelectronic switch can be mounted on the board, and the optical fibers 2 and 4 are terminated with multi-contact optical terminals for connecting at the corresponding inputs 1 and 5 with external circuits and external fiber-optic cables for interprocess communication.

 The information is transferred back from the storage devices to the central processors via the second channel, which works similarly to the first described above, but in the opposite direction. We also note that in order to provide two-way communication, both radiation sources and photodetectors should be located on the boards of central processors and memory devices (as well as in the optoelectronic switch).

 Using the proposed optoelectronic switch will allow 10-100 times to increase the speed, reliability and compactness of such devices.

Claims (3)

 1. Optoelectronic switch containing addressable photodetector nodes, nodes of radiation sources and groups of input optical fibers, characterized in that, in order to improve performance, groups of address and output optical fibers are introduced into it, the first is the s-th group of K electronic multiplexers (s - the maximum bit depth of the input code word, K is the number of groups of outputs of the switches), the first is the s-th block of photoelectric converters, the i-th input (i = 1 - N, N is the number of groups of inputs of the switch) of the j-th block of photoelectric converters (j = 1 - s) connected to the jth input fiber of the i-th group, the inputs of the l-th address photodetector nodes (l = 1 - K) are connected to the corresponding fibers of the l-th group of address light guides, the outputs of the l-th address photodetector are connected to the corresponding address inputs l- th electronic multiplexer of each j-th group, the l-th group of outputs of the j-th block of the photoelectric converter is connected to the information inputs of the l-th electronic multiplexer of the j-th group, the output of which is connected to the input of the l-th node of the radiation source of the j-th group, whose output through the corresponding s optical fiber connected to the j-th output waveguides l-th group.  2. The switch according to claim 1, characterized in that the block of photoelectric converters is made in the form of a photodetector assembly, the first - the Nth inputs of which are the inputs of the same name, the i-th output of the photodetector is connected to the i-th output of each l-th group photoelectric converter outputs.  3. The switch according to claim 1, characterized in that the block of photoelectric converters contains the first - k-th photodetector nodes and the first - N-th optical splitters, the inputs of which are the corresponding inputs of the block, the j-th output of the i-th optical splitter is connected to i-th input of the j-th photodetector, the outputs of which are the j-th group of outputs of the block.

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