KR200357686Y1 - Optical network training kit - Google Patents

Abstract

The present invention relates to an optical communication training device, and more particularly, to provide a learning environment so that learners can quickly and clearly grasp the state and results of laboratory training for optical communication, and to improve the achievement of learning. The present invention for this purpose and the optical signal processing module 110 for generating a laser light signal of a specific intensity (1310nm or 1550nm) by amplifying a video signal, a voice signal or an arbitrary frequency signal by the bias gain adjusted by the learner, A light receiving processing module 130 for receiving the laser light signal generated by the light emitting processing module 110 and amplifying the laser light signal by a learner and then restoring the original signal to the original signal, and the light transmitting processing module 110. The optical transmission channel module 120 transmits the laser optical signal generated by the optical signal to the optical reception module 130 through the optical fiber and divides or synthesizes the optical signal in a predetermined ratio (50:50 or 70:30) by the learner's selection. And a display device 150 for visually displaying transmission and reception results such as transmission loss, optical connector connection loss, signal distortion, and the like, and the optical transmitting and receiving module 110 and the optical receiver. It analyzes the results of the optical signal transmission and reception and controls the operation of the module 130 is configured of a microcomputer 140, to be displayed on the display device 150.

Description

Optical communication training device {OPTICAL NETWORK TRAINING KIT}

The present invention relates to an optical communication technology, and more particularly, to an optical communication training device for an optical communication practice of a learner.

In general, optical communication converts an electrical signal into an optical signal to enable long-distance transmission without transmission loss. In particular, it refers to a communication that transmits an electrical signal to a laser beam through an optical fiber transmission line.

Recently, due to the rapid development of the Internet, technology development has been accelerated to provide a faster communication environment to subscribers. In order to secure more subscribers by providing such a fast communication speed, there is a demand for an optical communication technology capable of providing a plurality of subscribers at the same time.

Therefore, there is an urgent demand for technicians for optical communication technology in this field according to the rapidly changing technology development, and high quality education for reliable optical communication is required.

However, conventionally, good training equipment is required to train optical communication engineers, but since there is no suitable training equipment for optical communication, only a simple phenomenon in which optical signals are guided to optical fibers using optical fibers, their connectors, and laser diodes is tested. There is a problem in that it is not possible to experiment the transmission and reception of high difficulty with respect to the voice signal.

In addition, in the prior art, a variety of measuring equipment should be provided for the practice of optical communication technology and training equipment requirements for forming various optical communication circuits and communication paths for the training must be prepared, which requires a lot of preparation time for a desired training, exceeding a predetermined training time. There are many cases, and moreover, there is a problem that cannot be done correctly.

Accordingly, the present invention was devised to solve the conventional problems, and provides optical training for improving the achievement of learning by providing a practice environment so that learners can quickly and clearly grasp the status and results of laboratory training for optical communication. The purpose is to provide a device.

1 is a block diagram of an optical communication training apparatus according to an embodiment of the present invention.

2 is a block diagram of a light emitting processing module of FIG.

3 is a block diagram of a light receiving processing module in FIG.

4 is a flowchart illustrating an optical communication process according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110: optical transmission module 120: optical transmission channel module

130: light receiving processing module 140: microcomputer

150: display device

The present invention provides an optical emission processing module for generating a laser light signal of a specific intensity (1310 nm or 1550 nm) by amplifying a video signal, an audio signal or an arbitrary frequency signal by a learner's bias gain to achieve the above object. And a light receiving processing module which receives the laser light signal generated by the light emitting processing module, amplifies the bias gain adjusted by the learner, and restores the original signal, and converts the laser light signal generated by the light emitting processing module into an optical fiber. An optical transmission channel module which transmits to the optical reception processing module and divides or synthesizes the optical signal in a predetermined ratio (50:50 or 70:30) by a learner's selection, and a transmission loss and an optical connector in transmitting and receiving the optical signal. Display unit for visually displaying the result of transmission and reception, such as connection loss, signal distortion, and the like, the optical transmission module and the optical reception module While controlling the analysis of the reception result of the optical signal to comprise a micro-computer to be displayed on the display unit.

The optical transmission module is a data conversion circuit for converting an RS-232 signal of a computer (PC) into a TTL signal, and an arbitrary frequency signal (a pulse of any one of a continuous wave (CW), 270 Hz, 1 KHz, and 2 KHz). A plurality of laser diodes for generating a frequency circuit, a plurality of laser diodes for converting the TTL signal or an arbitrary frequency signal into an optical signal having an arbitrary wavelength selected by a learner, and the plurality of laser diodes driving a plurality of laser diodes. And a feedback amplifier circuit for bias amplifying the signal to emit light with intensity, and a bias control switch for directly adjusting the bias of the feedback amplifier circuit by a learner.

The light receiving processing module includes: a light receiving diode for receiving a laser light signal generated by the light transmitting processing module through an optical transmission channel unit and converting the light into an electrical signal; and an amplifier circuit for amplifying the electric signal from the light receiving diode with a predetermined gain; A bias control switch for a learner to adjust the gain of the amplification circuit as desired, an A / D converter for converting the analog signal amplified by the amplification circuit into a digital signal and transmitting it to a microcomputer, and the analog signal in the amplification circuit. After converting to a TTL signal and converts into an RS-232 signal and comprises a data converter for transmitting to an external computer.

The optical transmission channel module includes a plurality of optical fibers for transmitting an optical signal between a laser diode included in the optical transmitting and receiving module and a laser diode provided in the optical receiving processing module, and connected to the optical fiber to the light receiving diode. It comprises a plurality of couplers for dividing and combining the intensity of the transmitted optical signal into 50:50 and 70:30, respectively, according to the ratio of transmission, reflection and absorption.

The optical transmission channel module is preferably fixed to an area adjacent to the coupler, and further comprises a plate for mechanically cutting and connecting the optical fiber.

Hereinafter, an optical communication training apparatus according to the present invention will be described in detail with reference to the drawings.

1 is a block diagram of an optical communication training apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of the light emitting processing module of FIG. 1, and FIG. 3 is a block diagram of the light receiving processing module of FIG. .

4 is a flowchart illustrating an optical communication process according to an embodiment of the present invention.

In the optical communication training apparatus according to an embodiment of the present invention, as shown in the block diagram of FIG. 1, a video signal, a voice signal, or an arbitrary frequency signal is amplified by a bias gain adjusted by a learner and has a specific intensity having an arbitrary pattern. (1310nm or 1550nm) receives the optical signal processing module 110 for generating a laser light signal and the laser light signal generated by the optical signal processing module 110, amplified by a bias gain adjusted by the learner and then original The optical reception module 130 for restoring the signal and the laser optical signal generated by the optical transmission module 110 are transmitted to the optical reception module 130 through an optical fiber, and the optical signal is selected by a learner. Optical transmission channel module 120 which is divided or synthesized at a predetermined ratio (50:50 or 70:30), and transmission and reception results of transmission loss, optical connector connection loss, signal distortion, etc. in the optical signal transmission and reception. Control the operation of the display device 150 and the optical transmission module 110 and the optical reception module 130 to visually display and analyze the transmission and reception results of the optical signal and display the result on the display device 150. It consists of a microcomputer 140 to make.

The device according to an embodiment of the present invention of such a configuration is configured to be mounted on a portable case.

In addition, the optical transmission module 110, the optical transmission channel unit 120 and the optical reception module 130 are arranged and mounted for each sector, and the optical communication training components are exposed and mounted.

The optical transmission module 110 includes a data conversion circuit 260 for converting an RS-232 signal of a computer into a TTL signal, and any frequency signal (continued wave (CW), 270Hz, 1KHz, 2KHz). A frequency circuit 290 for generating any pulse), a microphone 270 for voice input, an external input terminal 280, the data conversion circuit 260, a microphone 270, an external input terminal 280 or switch 210 for selecting one of the signals of the frequency circuit 290, and converts the signal selected by the switch 210 into a laser light signal of any wavelength (1310nm or 1550nm) selected by the learner The diode driver 220 driving the laser diode selected by the learner among the laser diodes 231 and 232 by amplifying the signal selected by the switch 210 according to the laser diodes 231 and 232 and the bias value selected by the learner. ) And driven by the diode driver 220 The photodetector 240 detects the intensity of the laser light of the edger and the diode driver 220 to stabilize the laser light signal of the driven laser diode with a feedback gain value according to the detection intensity of the photodetector 240. Consists of including feedback amplifier 250 to deliver.

The laser diodes 231 and 232 are composed of laser diodes of 1310 nm and 1550 nm wavelengths, and the 1310 nm and 1550 nm wavelengths can be transmitted at the lowest loss in a single mode optical fiber, so that the results of the training can be clearly understood.

The diode driver 220 buffers and amplifies the signal selected by the switch 210 according to a user's bias value and the feedback amplifier (a feedback gain of 2500), and a buffer amplifier 231 of the buffer amplifier 231. A bias control switch 233 for directly adjusting a bias value and a gain of a signal for driving one laser diode selected by a learner from among the plurality of laser diodes 231 and 232 may be used. It comprises a drive circuit 222 which automatically adjusts according to the feedback gain value.

The light detector 240 includes photodiodes 241 and 242 coupled to the laser diodes 231 and 232 to detect the laser light.

The feedback amplifier 250 includes a negative feedback amplifier 252 for adjusting the amplification gain of the buffer amplifier 221 according to the light intensity detected by the photodetector 240 and the driving circuit according to the detected light intensity. And an automatic output control circuit 251 for adjusting the gain of 222.

The light receiving processing module 130 receives a laser light signal generated by the light transmitting processing module 110 through an optical transmission channel module 120 and converts it into an electrical signal, and the light receiving diode 310 Amplification circuit 320 for amplifying the electrical signal at a predetermined gain, a bias control switch 321 for the learner to adjust the gain of the amplification circuit 320 as desired, and in the amplification circuit 320 The A / D converter 330 converts the amplified analog signal into a digital signal and transmits it to the microcomputer 140, and converts the analog signal from the amplification circuit 320 into a TTL signal and then converts it into an RS-232 signal. And a data amplifier 340 for transmitting to an external computer, and a voice amplifier circuit 350 for amplifying an electric voice signal from the light-receiving diode 310 with a predetermined gain and outputting the same to a speaker.

Since there are many kinds of light-emitting diodes 310, a device suitable for measurement should be used, and an InGaAs photodiode is used because efficiency and resolution should be good.

The data converter 340 converts and stabilizes an analog signal amplified by the amplification circuit 320 to a TTL signal, and stabilizes the TTL signal in the data stabilization circuit 341 by an RS-232 signal. And a data conversion circuit 342 for converting the data into an external computer.

The optical transmission channel module 120 is connected to the optical fiber and a plurality of optical fibers for transmitting the laser optical signal generated by the optical transmission processing module 110 to the optical reception processing module 130, the intensity of the laser optical signal A plurality of couplers for dividing and synthesizing at 50:50 and 70:30, respectively, according to the ratio of transmission, reflection and absorption, and fixed to an area adjacent to the coupler, and including plates for mechanically cutting and connecting optical fibers. Configure.

The display unit 150 is an auxiliary display for displaying the intensity of the optical signal analyzed by the microcomputer 140 receiving the digital signal of the A / D converter 330, and the control of the microcomputer 140 And a main display for displaying a result of transmission loss of the optical signal, connection loss of the optical connector, intensity of the transmission / reception data, reflection loss, signal distortion, and the like.

Referring to Figure 4 the operation according to an embodiment of the present invention configured as described above is as follows.

First, the learner sets a training topic for the optical communication practice, and determines how to perform the optical communication practice using the training materials provided in the apparatus according to the embodiment of the present invention according to the subject.

A plurality of laser diodes 231 and 232 provided in the optical transmission module 110 are simultaneously connected to a plurality of optical fibers provided in the optical transmission channel module 120, and an external optical fiber is tested or a plate which is a coupler and a mechanical connector; Prepare the experiment type to be made according to data transmission, transmission loss and connection loss, and for this purpose, form a loop of transmitting and receiving optical fiber and connecting connector.

At this time, in order to transmit the laser light signal from the light emitting processing module 110 to the light receiving processing module 130, the microcomputer 140 senses the laser diode selected by the learner among the laser diodes 231 and 232, and the corresponding diode. Control the light emitting processing module 110 to drive.

That is, the microcomputer 140 determines whether it is selected as a laser diode generating light of 1310 nm wavelength or a laser diode generating light of 1550 nm wavelength, and drives the corresponding laser diode.

At this time, the learner may generate an optical signal of a desired pulse, which is one of a continuous wave (CW), 270Hz, 1KHz, or 2KHz generated by the frequency circuit 290, and the learner uses the bias control switch 223. The optical signal intensity of the selected laser diode may be adjusted.

Accordingly, when the laser beam signal of a specific pattern and a specific intensity is transmitted from the light transmission processing module 110, a communication pattern is formed while passing through an optical fiber, a coupler, and a connector provided in the optical transmission channel module 120, thereby receiving a light. The photodiode 310 of the module 130 receives the optical signal and outputs an electrical signal. At this time, transmission and connection loss occur depending on the characteristics of the coupler and the connector according to the communication pattern, and induces learning to be performed.

The electrical signal output from the light receiving diode 310 is amplified in a range corresponding to the amplification gain set by the learner in the amplifier circuit 320.

Accordingly, the microcomputer 140 receives the digital signal of the A / D converter 330 connected to the amplifying circuit 320 and displays the amplification range of the transmission and reception, the amplification range of the bias and the connection and transmission loss. (150). If necessary, the waveform may be measured by transferring the amplified signal from the amplification circuit 320 to an oscilloscope which is an external measuring device.

In addition, if you want to practice computer chat or file transfer, you can connect the computer to the PC connector connected to the data conversion circuit 260 of the optical transmission module 110 and determine whether the transmission and reception data is transmitted through the optical fiber. . The signal transmission path in this case is a computer-a data conversion circuit 260-a diode driver 220-a laser diode unit 230-an optical transmission channel module 120-a light receiving diode 310-an amplifying circuit 320-a data conversion Section 340-will be via the computer sequentially.

When the voice call is to be practiced using optical communication, the microphone 270 is selected by using the switch 210 of the optical transmission module 110, and the laser light is applied to the light receiving diode 310 as in the case of the practice using the computer. The reception of the signal can be confirmed, and the amplification of the electrical signal from the light receiving diode 310 by the voice amplifier circuit 350 is outputted to the speaker so that the call process using optical communication can be practiced.

Although the preferred embodiment of the present invention has been described above, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention described in the claims below. You will understand.

As described in detail above, the present invention can achieve the effect of reducing the manufacturing cost and shortening the manufacturing process because the circuit of the laboratory training equipment is simply configured, thereby improving economic efficiency and productivity.

In addition, the present invention not only improves the achievement of learning, but also learns communication paths and optical waveguide characteristics of various optical communication because it provides an environment for learners to quickly and clearly grasp the state and results of the laboratory training for optical communication. effective.

Claims (6)

An optical emission processing module for amplifying a video signal, an audio signal, or an arbitrary frequency signal by a bias gain adjusted by a learner to generate a laser optical signal having a specific intensity (1310 nm or 1550 nm); An optical reception module for receiving the laser light signal generated by the optical emission processing module, amplifying with a bias gain adjusted by the learner, and restoring the original signal; The optical transmission channel module transmits the laser optical signal generated by the optical transmission processing module to the optical reception processing module through the optical fiber and divides or synthesizes the optical signal by a predetermined ratio (50:50 or 70:30) by the learner's selection. and, A display device unit for visually displaying transmission and reception results such as transmission loss, optical connector connection loss, signal distortion, etc. in the optical signal transmission and reception; And a microcomputer for analyzing the results of the transmission and reception of the optical signal and displaying them on the display device while controlling the operations of the optical transmission module and the optical reception module. The method of claim 1, wherein the light emitting processing module A data conversion circuit for converting the RS-232 signal of the computer (PC) into a TTL signal; A frequency circuit for generating an arbitrary frequency signal (any pulse of CW, 270Hz, 1KHz, 2KHz), A plurality of laser diodes for converting the TTL signal or an arbitrary frequency signal into a laser optical signal of an arbitrary wavelength (1310 nm or 1550 nm) selected by a learner; A feedback amplifier circuit for driving the plurality of laser diodes and bias-amplifying the plurality of laser diodes so as to emit light at a predetermined light intensity; Learner comprises a bias control switch for directly adjusting the bias of the feedback amplifier circuit configured to the optical communication training device. The method of claim 1, wherein the light receiving processing module A light receiving diode for receiving the laser light signal generated by the light emitting processing module through an optical transmission channel unit and converting the light into a electrical signal; An amplifying circuit for amplifying the electrical signal in the light receiving diode with a predetermined gain; A bias control switch for adjusting a gain of the amplification circuit by a learner as desired; An A / D converter converting the analog signal amplified by the amplification circuit into a digital signal and transmitting the digital signal to a microcomputer; And converting an analog signal from the amplification circuit into a TTL signal and converting the analog signal into an RS-232 signal and transmitting the converted signal to an external computer. 4. The optical communication training device according to claim 3, wherein the photodiode is formed of an InGaAs photodiode. The method of claim 1, wherein the optical transmission channel module A plurality of optical fibers for transmitting an optical signal between a laser diode provided in the optical transmission processing module and a laser diode provided in the optical reception processing module; And a plurality of couplers for dividing and synthesizing the intensity of the optical signal connected to the optical fiber from the laser diode to the light receiving diode into 50:50 and 70:30 according to the ratio of transmission, reflection and absorption, respectively. Optical communication training device characterized in that. The optical communication training device of claim 5, further comprising a plate fixed to an area adjacent to the coupler and configured to mechanically cut and connect the optical fiber.