SU1259318A1 - Optronic device for reception and transmission of information - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to receive and transmit information. The purpose of the invention is to simplify the device. In the information transfer mode in a parallel binary code, an information signal using a light modulator, a translucent mirror and a group of delay elements on optical fibers of various lengths is converted into a sequence of light signals and transmitted to the communication line. The shortest and longest optical fibers of the delay element, a kin of the light modulator, are sprinkled with pulses that serve as markers of the beginning and end of the burst. In receive mode, a serial code of light pulses using a group of delay elements, a translucent mirror, a block of optical switches and a group of photodetectors is converted into a parallel code of electrical impulses. The optoelectronic element I selects the moment of reception of the entire sequence of light pulses. 1 il. SP

Description

The invention relates to automation and computer technology and can be used in communication systems, transmission and reception of video images, computer memory devices.

The purpose of the invention is to simplify the device.

The drawing shows the functional diagram of the device.

The device contains a light source 1, a translucent mirror 2, a group of photodetectors 3, a group of delay elements 4, a light modulator 5 optical key block 6, an optoelectronic element I 7, a delay element 8.

Two modes of operation of the device are distinguished: the mode of transmitting consecutive codes formed depending on the information signal sent to the information input of the device, and the mode of receiving serial codes. As recognizable sequential codes, codes can be used that by their parameters (number of bits, pulse period, pulse duration) are similar to sequential codes generated by this device.

The device works as follows.

In the transmission mode, depending on the information signal arriving at the information input of the device, the capacity of the corresponding elements of the modulator 5 changes, as a result of which the light pulse of the light source 1 is modulated (the operation of the light source is clocked by a pulse — a sign to the clock input of the device). The modulated light pulse, reflected from the translucent mirror 2, enters the group of optical fibers of the delay elements 4 at different lengths. ohozhdeni pulses dies us characterized by an amount dt fold proportional ut, where ut - the difference of the lengths of two adjacent optical fibers. In the shortest and longest fibers, directly mine modulator 5, pulses of the element sprinkle, which serve as markers of the beginning and end of sprinkling. Group of elements 4 converts the parallel light code of the information signal into

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serial and outputs it to the communication line from the input-output device. Thus, the communication line receives a sending of light pulses, which is a serial code of the information signal, with a pulse period of ut and limited by marker pulses of the beginning and end of the burst. The presence of a light pulse in the fiber corresponds to 1 in the sequential code, the absence of - O - skipping.

In the receive mode, the serial code of the light pulses is fed to the input-output device, the group of elements 4 converts the serial code into a parallel one. The moment of occurrence of both marker-pulses at the output of delay element 8 indicates that the entire serial code of the light pulses has developed into a parallel and opto-electronic element I 7 outputs a control signal to the optical switch unit 6, which opens and transmits light pulses in a parallel code to the inputs of a group of photodetectors 3, which convert the parallel code of light pulses into a parallel code of electrical pulses at the output of the device.

The device has a sufficiently high speed, since the time of reception (transmission) is determined by the time of passage of the light. pulse. for the longest fiber of the set (10 10. s / cm) the response time of the photodetectors (for photodiodes it is less than 1 not). The pulse duration is selected taking into account possible distortions in the optical fibers and from the condition of exclusion of the possibility of imposing pulses on the outputs of a group of optical fibers.

Claims (1)

Invention Formula An optoelectronic device for receiving and transmitting information, containing a light source, a translucent mirror, a group of photodetectors and a group of delay elements made in the form of optical fibers of different lengths, the first ends of which are combined and are the input-output device, characterized in that, with for the sake of simplicity, a light modulator, an optical unit between the photodetector group and the translucent mirror, the optoelectronic element I, the delay element made on optical fibers of the minimum and maximum length, the light modulator is located between the light source and the translucent mirror, the first light source outputs are optically connected to the first inputs of the module a torus of light whose outputs through a semitransparent mirror are connected to the second ends of the optical fibers of a group of delay elements, which through a semitransparent mirror are connected are connected to data inputs of the block of optical switches, optical outputs of which are connected via soot Editor N. Gulko Compiled by M. Artamonov Tehred M. Khodanich Proofreader L. Patay Order 5125/49 Circulation 515 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 five 0 five 18 . 4 corresponding photodetectors with information outputs of the device, the second and third outputs of the light source through a translucent mirror are optically connected to the first ends of the optical fibers of the delay element, the second ends of the optical fibers of which are combined with the input fiber of the delay element through the semi-transparent mirror optically connected to the inputs of the optoelectronic element And, the output of which is connected to the control input of the optical switch unit, the input of the light source is such as are for input device, and inputs the light modulator - the information input apparatus. .