SU997260A1 - Device for communication through common of channel - Google Patents

Description

The invention relates to optical communications and can be used in optical information transmission systems.

A device for communication over a common optical path is known, comprising an optical transmitter, the output of which is connected via an optical switch to the input of an optical receiver, as well as a control unit, the input of which is connected to another output of the optical transmitter, and the outputs connected to the input of optical switch 1.

However, the known device has low noise immunity due to the fact that the transmission of information signals results in interference with signals, which does not allow obtaining high noise immunity.

The purpose of the invention is to improve noise immunity.

The goal is achieved by installing a device for communication over a common optical path. A delay unit is inserted whose output is connected to the input of the optical transmitter, the output of the optical receiver connected to the auxiliary input of the control unit, the control unit being configured as two drivers, the outputs of which are connected to the inputs of the OR element / whose output is connected to the input of the inverter, with the inputs of the drivers, the output of the element OR, the output of the inverter respectively the inputs and outputs of the control unit.

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Wherein the optical switch comprises two electro ventyl, gfychem output of the first electro valve through an optical fiber connected to the input optiches15 troynikrvogo one connector, the output of which through the optical fiber to the input of the second podk.pyuchen electro valve, the input of the first electro valve, vy20 electro valve stroke vtoryugo The input-output optical tee connector are respectively the inputs and outputs of the optical switch.

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FIG. 1 shows a structural electrical circuit of the device; in fig. 2 - diagrams explaining his work.

Claims (2)

The communication device along the common optical path contains, block 1 delay, optical transmitter 2, control unit 3, optical switch 4, optical receiver 5. Moreover, control unit 3 contains drivers 6, and 7, the OR element 8 and inverter 9. And optical switch 4 contains electro-optical valves 10 and 11, an optical triple connector 12, and an optical fiber 13. The device operates as follows. When a transmission pulse delay is applied to the input of the block 1 (Fig. 20), each delayed pulse (Fig. 2b) modulates the optical transducer The sensor 2, as well as after differentiation (Fig. 2c), arrives at the 3-control unit and triggers the shaper 7, which generates a control pulse (Fig. 2d), then applied to the OR element 8, the output of which appears the same pulses (in the absence of reception pulses) that control the electro-optical valves 10 and 11, and the electro-optical valve 10 through the inverter 9. Under the influence of this pulse, the electro-optical valve 10 opens, resulting in a common path connected to the optical output of the optical of the transmitter 2. At the same time, the control pulses close the electro-optical valve 11, as a result of which the optical receiver is disconnected from the common optical path. Upon the completion of the transmission pulse to the control unit 3, the driver 7 returns to its initial state after a predetermined time, as a result of which the output of the OR element 8 changes, the electric valve 10 is closed, the electric valve 11 opens and the input of the optical receiver 5 switches to common path and opens the possibility to receive pulses from. optical transmitter 2 correspondent. The reception pulse is processed by the optical receiver 5 and is outputted both at the output (Fig. 2L) of the optical receiver 5, and after differentiation to the input (Fig. 2f of the 3 ynpa lanyard unit). The input pulse (Fig. 2 of the control block 3 corresponds to the trailing edge of the pulse receive and causes the actuator 6, the output of which (Fig. 2-h) is fed to the input of the element OR 8 and causes a trigger (Fig. 26), which causes the electro-optical valve 11 to be turned off, which turns off the optical receiver 5 from the common path and switching on (fig. 2 f) 10, the duration of the equal signal produced by shaper 7 is chosen so as not to overlap a part of the clock interval, which is known a priori as the arrival time of the receiving pulse. relations between the pulses of reception and transmission in order to ensure reliable operation of the system of optical information transmission. The optical switch 4 allows the switching of pulsed signals with high speed by using electric rooptieskih valves 10 and 11. The application devices optichesoy for communication over a common path in the fiber-optic lines transmitting information from the receiver allow 5d1itit affect the signal emitted by the transmitter into a common path. Thus, the proposed device for optical communication over a common path makes it possible to transmit pulsed signals with high resistance to resistance over a large distance. Claim 1 .. A device for communication over a common optical path, comprising an optical transmitter, the output of which is connected via an optical switch to the input of an optical receiver, and a control unit whose input is connected to another output of an optical transmitter, and the outputs are connected to the input of an optical switch , distinguishing it by the fact that, in order to improve noise immunity, a delay block is inserted into it, the output of which is connected to the input of the optical transmitter, and the output of the optical receiver is connected to an additional input of the control unit, wherein the control unit is made in the form of two drivers, the outputs of which are connected to the inputs of the OR element, the output of which is connected to the input of the inverter, where the inputs of the Formers, the output of the OR element and the output of the inverter are respectively the inputs and outputs of the control unit. 2. A device according to claim 1, characterized in that the optical switch comprises two electro-optical valves, the output of the first electro-optical valve being connected via an optical fiber to the input of an optical tee connector, the output of which is through an optical one. A cc fiber is connected to the input of the second electro-optical valve, the output of the second electro-optical valve, and the input-output of the optical tee-coupler are respectively the inputs and outputs of the optical switch. Sources of information taken into account in the examination 1. UK application No. 1461362, cl. H 04 B 9/00, 1977, (prototype). f3