KR20120117353A - One body type optical power meter having fault position finder - Google Patents

Abstract

PURPOSE: An optical power meter for integrating with a failure point detector is provided to totally detect the optical signal power and failure points of an optical line using an integrated apparatus. CONSTITUTION: A sensing unit(13) senses a test optical signal applied to an optical line using a failure point detection optical connector or the amount of an optical signal applied using an optical input connector unit. A control unit(50) computes power including the optical signal sensed by the sensing unit in wavelength inputted using a control unit. The control unit determines whether the optical line is failed based on the test optical signal sensed by the sensing unit and the test optical signal applied to the optical line using the failure point detection optical connector. [Reference numerals] (17) A/D converter; (AA) n bit output; (BB) n bit input

Description

ONE BODY TYPE OPTICAL POWER METER HAVING FAULT POSITION FINDER}

The present invention relates to an optical power meter in which a fault point detector capable of detecting whether there is a fault point in an optical path or the like is integrally provided.

Recently, the development of information technology, such as the increase of Internet traffic and the diversification of multimedia services, has increased the need for the development of high-speed, high-capacity optical fiber. The optical fiber line has the advantage that it is easy to handle a large amount of information, can transmit almost infinite information, low transmission loss, and no interference by electromagnetic waves, compared to the existing copper line.

In addition, it is possible to reduce the saturation of the pipeline because of the use of thin optical fiber, and it is economically superior in consideration of the increase in copper wire price and the decrease in the price of devices required for optical communication, and can provide broadband service. Considering such a situation, it is necessary to replace the existing copper line with the optical line.

Representative optical paths are known as hybrid-type networks using coaxial and optical cables, and FTTH (Fiber-To-The-Home) optical beams, in which optical cables are embedded in homes. However, due to the high speed transmission of a large amount of data signals through optical cables, such optical paths cause enormous damage in the event of failure of the optical path itself. Therefore, in order to minimize the damage caused by optical path failure, The location of the failure should be identified and repaired quickly.

As a method for identifying an optical path failure, conventionally known methods for identifying an optical signal transmission failure using an optical power meter or a location of a failure using an optical time domain reflectometer (OTDR) are known. It has been.

However, these methods not only require expensive optical equipment, but also require complicated operations to accurately locate the fault and locate it.

In order to solve this problem, various types of fault detectors are used. In order to determine the failure of the optical path, there is still an inconvenience of carrying an optical power meter and a fault detector separately.

In addition, the optical power meter shows the power of the optical signal transmitted at the wavelength of the selected optical signal, and the user cannot always know how much power of the optical signal at the wavelength is a communicable optical signal. There is a problem in that the power of the optical signal that can communicate at the wavelength must be recognized.

In order to solve the above problems, an aspect of the present invention provides a fault point detector integrated optical power meter capable of detecting both the optical signal power on the optical path and the failure point of the optical path.

In addition, another aspect of the present invention provides a failure point detector integrated optical power meter capable of determining whether the power of the optical signal at the wavelength is a communication optical signal and informs the user.

To this end, the fault detector integrated optical power meter according to an embodiment of the present invention, the optical input connector unit is connected to the optical path through which the optical signal is transmitted to receive the optical signal transmitted; A light source unit generating a light source for determining whether a light path has failed; A failure detection light source connector unit connected to one end of the optical path and configured to apply a test optical signal generated by the light source to the optical path; An operation unit which receives a wavelength for measuring power among wavelengths of the optical signal applied through the optical input connector unit; A detection unit for detecting an amount of the optical signal applied through the optical input connector unit or a test optical signal applied to the optical path through the fixed point detection light source connector unit; Calculate the power of the optical signal detected by the sensing unit at the wavelength input through the operation unit, and determine whether the optical path is broken based on the test optical signal applied to the optical path through the fault detection light source connector and the test optical signal detected through the sensing unit. It includes; a control unit for determining.

The controller may determine whether the calculated power of the optical signal is optical signal power within a predetermined range in which communication is possible at a wavelength input through the operation unit.

In addition, the display unit for displaying the power of the calculated optical signal, whether or not the failure of the optical path and the power of the calculated optical signal is the optical signal power within a predetermined range that can communicate at the wavelength input through the operation unit; Include.

In addition, an alarm unit that notifies the user of the power of the calculated optical signal, whether the optical path is broken, and whether the power of the calculated optical signal is the optical signal power within a predetermined range that can be communicated at the wavelength input through the operation unit. It further includes;

In addition, the controller determines that there is a failure point in the optical path when a difference between the power of the test optical signal applied to the optical path through the failure point detection light source connector unit and the power of the test optical signal detected through the detection unit is greater than or equal to a predetermined value.

In addition, the wavelength input through the operation unit is characterized in that any one of 1310nm, 1490nm, 1550nm.

The display unit also includes one or more LED lamps.

In addition, the one or more LED lamps include a green LED and a red LED lamp, and the control unit is configured to turn on the green LED lamp when the power of the calculated optical signal is an optical signal power within a predetermined range that can communicate at a wavelength input through the operation unit. If the power of the calculated optical signal is not the optical signal power within a predetermined range that can be communicated at the wavelength input through the operation unit, the red LED lamp is turned on, and the optical signal power at the input wavelength can be communicated or not. When in the border region of, the green LED lamp and the red LED lamp cross and control to turn on and off.

In addition, the controller calculates the power of the optical signal at a wavelength of 1490 nm when power is applied and no wavelength is input through the operation unit.

In addition, the operation unit includes a failure point detection switch, and the control unit causes the light source to be applied to the light path through the failure point detection light source connector unit when the failure point detection switch is ON.

According to one aspect of the present invention described above, the optical signal power on the optical path and the failure point of the optical path can be detected through a single device.

In addition, according to another aspect of the present invention, it is possible to determine how much power of the optical signal at the corresponding wavelength is an optical signal that can communicate, and provides the user with convenience by informing the user of the determined result.

1 is an external configuration diagram of a failure point detector integrated optical power meter according to an embodiment of the present invention.
2 is an internal configuration diagram of a failure point detector integrated optical power meter according to an embodiment of the present invention.
3 is a characteristic graph of an optical signal detected through a detection unit of a failure point detector integrated optical power meter according to an embodiment of the present invention.

In general, the optical power meter is an essential equipment for the installation and test measurement of the optical communication system. When the optical communication system is installed, the optical signal strength (power) suitable for the power of the optical signal transmitted from the transmitting part of the optical communication system is suitable for the receiving part. The optical power meter may be used to check whether or not it is received. The optical power meter may be performed to measure optical power for each wavelength band, as well as to measure the presence or absence of an abnormal optical communication facility.

In this case, the optical power generally indicates the intensity of light generated from the optical transmitter light source of optical communication, and is usually expressed in dBm. When the laser diode is used as the light source, the light output of the single mode laser diode LD is -6 dBm or more and multiple times. The output of the mode LD is set to a value of -2 dBm or more.

Optical power meter integrated with the fault detector according to an embodiment of the present invention can perform both the function of the optical power meter for measuring the optical power for each wavelength band and the fault point detection function for detecting a more accurate failure point of the optical path. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, an external configuration of a failure point detector integrated optical power meter according to an embodiment of the present invention will be described with reference to FIG. 1.

1 is an external configuration diagram of a failure point detector integrated optical power meter according to an embodiment of the present invention.

Externally, the failure point detector integrated optical power meter 1 includes an optical input connector unit 10, a failure point detection light source connector unit 20, a display unit 30, an operation unit 40, and a battery mounting unit 60. do.

The optical input connector unit 10 may be provided at one side of the failure point detector integrated optical power meter 1, and may be provided at an upper portion of the failure point detector integrated optical power meter 1. .

In addition, the optical input connector unit 10 is connected to the optical path through which the optical signal is transmitted and receives the optical signal transmitted.

The failure point detection light source connector unit 20 may be provided at one side of the failure point detector integrated optical power meter 1, similar to the optical input connector unit 10 as shown in FIG. 1. It may be provided on top of the power meter (1).

In addition, the failure detection light source connector 20 is connected to one end of the optical path and applies a test optical signal generated by the light source to the optical path.

The display unit 30 may be provided at the front of the fault detector integrated optical power meter 1, and may be provided at the top of the front of the fault detector integrated optical power meter 1 as shown in FIG. 1. .

In addition, the display unit 30 displays the power of the optical signal on the optical path, whether the optical path is broken, and whether the optical signal power is the optical signal power within a predetermined range that can communicate at a specific wavelength.

In addition, the display unit 30 includes a wavelength display unit 32 for displaying a wavelength of an optical signal to be measured, an optical power display unit 34 for displaying an optical power at a corresponding wavelength of an applied optical signal, and an applied optical signal. It includes a communication availability display unit 36 for indicating whether or not the optical power at the corresponding wavelength of the signal within the communication range. Here, the communication availability display unit 36 may be installed on the display unit 30, and may be installed in the operation unit 40 as shown in FIG. 1.

In addition, the wavelength display unit 32 displays a measurement wavelength or an initially set wavelength input through the operation unit 40 in nm units.

In addition, the optical power display unit 34 displays the power of the optical signal applied to the failure point detector integrated optical power meter 1 in dBm units. 1 shows power of an optical signal up to two decimal places.

In addition, the communication availability display unit 36 indicates whether or not the power of the optical signal displayed on the optical power display unit 34 at the wavelength displayed on the wavelength display unit 32 is enough to communicate.

For example, as shown in FIG. 1, the communication availability display unit 36 may be formed of two LED lamps. One of the two LED lamps here is a green LED lamp and the other is a red LED lamp.

If communication is possible, the display unit 36 turns on the green LED lamp according to the control signal of the controller (shown in FIG. 2) when communication is possible, and turns on the red LED lamp according to the control signal of the controller when communication is not possible. And in the border area between communication enable and disable, turn on the green LED lamp and the red LED lamp by crossing the control signal of the controller.

In addition, as shown in FIG. 1, the display unit 30 may display the remaining amount of the battery.

As shown in FIG. 1, the operation unit 40 may be installed at the lower portion of the display unit 30.

In addition, the operation unit 40 includes a wavelength input unit 42, a power supply unit 44, a failure point detection light source switch unit 46, and a backlight unit 48.

The wavelength input unit 42 receives a wavelength for measuring optical power among wavelengths of the optical signal applied through the optical input connector unit 10. The wavelength input unit 42 may receive any one of a preset 1310 nm, 1490 nm, and 1550 nm.

The power supply unit 44 is a portion to which power is applied to operate the failure point detector integrated optical power meter 1.

The failure point detection light source switch 46 is a portion that causes the light source to be generated in the light source unit (shown in FIG. 2) to determine whether there is a failure point on the optical path.

The backlight unit 48 is a portion that allows light to be applied to the display unit 30 so that the items displayed on the display unit 30 are clearly seen in a dark environment.

The battery mounting unit 60 is a part in which a battery is provided to supply power necessary for the operation of the failure point detector integrated optical power meter 1.

Next, the internal configuration and operation of the failure point detector integrated optical power meter 1 will be described based on FIGS. 2 and 3.

2 is an internal configuration diagram of a fault detector integrated optical power meter according to an embodiment of the present invention, Figure 3 is an optical signal sensed through the detection unit of the fault detector integrated optical power meter according to an embodiment of the present invention Is a characteristic graph.

The breakdown detector integrated optical power meter 1 includes an optical input connector 10, a detector 13, an amplifier 15, an A / D converter 17, a failure point detection light source connector 20, and a light source unit ( 26, a display unit 30, a display driver 35, an operation unit 40, and a control unit 50.

The failure point detector integrated optical power meter 1 according to an embodiment of the present invention can measure optical power in all wavelength bands used for optical communication, and can also detect a failure point of an optical path.

First, the operation of measuring the optical power will be described with reference to FIG. 2.

The optical signal connected to the optical path and input through the optical input connector unit 10 is detected by the sensing unit 13, and the detected optical signal is photoelectrically converted into an electrical signal through the sensing unit 13.

The sensing unit 13 may be formed of a photo diode such as InGaAs or germanium. In FIG. 1, the sensing unit 13 is formed of such a photodiode.

Thereafter, the signal amplifier 15 is amplified to a set level, and the amplified signal is converted into a digital signal by the A / D converter 17 and provided to the controller 50.

In this case, the control unit 50 operates according to the operation on selection through the operation unit 40, and then selects an optical wavelength to be measured by the operation unit 40, and the control unit 50 is provided from the A / D converter 17. Detects the magnitude of the signal component corresponding to the wavelength selected by the operation unit 40 among the received input signals, and converts the detected digital value into dBm or dB value to the display unit 30 such as an LCD through the display driver 35. Will print.

In addition, the sensing unit 13 detects an optical signal introduced through the optical input connector unit 10, and detects an amount of the optical signal incident on the unit area of the sensing unit 13.

The amount of the detected optical signal is received by the control unit 50 as n BIT data via the A / D converter 17. The n BIT data can be implemented in various numbers of BIT, such as 12 BIT or 14 BIT.

 The control unit 50 calculates the optical power based on the received n BIT data, the value of the wavelength input through the control unit 40 (any one of 1310 nm, 1490 nm, and 1550 nm) and the characteristics of the sensing unit 13. Here, the characteristic of the sensing unit 13 represents the characteristics of the photodiode forming the sensing unit, and its characteristics vary depending on the components of the photodiode.

As an example, the photodiode may be formed of an InGaAs photodiode, which has a characteristic graph shown in FIG. 3. That is, the amount of light signal different according to the wavelength is sensed. Here, the unit of wavelength is nm and the amount of optical signal is A / W.

For example, it reacts at a value of 0.2 A / W at 800 nm frequency and outputs 0.2 A / W value at 1700 nm frequency.

Here, the display unit 30 is capable of displaying the type and optical power of the optical wavelength to be measured. As described above, the failure point detector-integrated optical power meter 1 according to an embodiment of the present invention includes an operation unit 40 including various keys for selecting an optical wavelength in order to measure optical power of various modulated lights. It measures the intensity (power) of the optical signal under measurement by selecting the optical wavelength.

In addition, the controller 50 may display the power of the input optical signal on the display unit 30. That is, when the power of the optical signal is calculated through the controller 50, the controller 50 drives the display driver 35 so that the calculated power is displayed on the display unit 30.

In addition, the controller 50 determines whether the power of the calculated optical signal is an optical signal power within a predetermined range that can communicate at a wavelength input through the operation unit 40. The optical signal power in the predetermined range here is preferably the optical signal power in the range of -25 dBm to -10 dBm.

When it is determined that communication is possible, the controller 50 controls the green LED lamp of the communication availability display unit 36 to light up, and when the communication is impossible, the controller 50 controls the red LED lamp to light up. And, if the optical signal power at the wavelength range of the communication possible and impossible at the wavelength, the green LED lamp and the red LED lamp is controlled to turn on and off.

Next, an operation of measuring whether a failure point exists on the optical path will be described based on FIG. 2.

When the failure point detection light source switch unit 46 is turned on, the control unit 50 causes the light source unit 26 to generate a test light signal, and the generated test light signal causes the failure point detection light source connector unit 20 to operate. It is applied at one end of the optical path through. The applied test optical signal is transmitted along the optical path, and the sensing unit 13 detects the test optical signal coming through the optical input connector unit 10 connected to the other end of the optical path.

The controller 50 compares the detected test optical signal with the test optical signal generated by the light source unit 26 to determine whether there is a failure point on the optical path. That is, when the difference between the test optical signal generated by the light source unit 26 and the detected test optical signal is greater than or equal to a predetermined value, it means that the optical signal is not transmitted properly in the optical path.

In addition, the controller 50 may display on the display unit 30 whether there is a failure point on the optical path. For example, as described above, the LED lamp included in the display unit 30 may be turned on or off to indicate whether there is a failure point. In addition, when it is determined whether there is a failure point on the optical path through the controller 50, the controller 50 drives the display driver 35 so that the failure is displayed on the display unit 30.

In addition, the control unit 40 automatically cuts off the power when a predetermined time elapses after the power is turned on to the failure point detector-integrated optical power meter 1.

In addition, the controller 40 measures the optical signal at a wavelength of 1490 nm when the power is turned on, even when the wavelength is not input through the wavelength input unit 42 of the operation unit 40.

In addition, the display unit 30 may be implemented in the form of an alarm unit. That is, on the screen, the power of the calculated optical signal, the failure of the optical path, and the power of the calculated optical signal are optical signal power within a predetermined range that can be communicated at the wavelength input through the operation unit 40. Instead, the user can be notified by sound.

1: optical power meter with fault detector
10: optical input connector 13: sensing
15 amplifier 17 A / D converter
20: fault detection light source connector 26: light source
30: display unit 40: operation unit
50: control unit 60: battery mounting unit

Claims (10)

An optical input connector unit connected to an optical path through which an optical signal is transmitted and receiving an optical signal transmitted;
A light source unit generating a light source for determining whether the light path has failed;
A failure detection light source connector unit connected to one end of the optical path and configured to apply a test optical signal generated by the light source to the optical path;
An operation unit which receives a wavelength for measuring power among wavelengths of the optical signal applied through the optical input connector unit;
A detector for detecting an amount of an optical signal applied through the optical input connector or a test optical signal applied to the optical path through the fixed point detection light source connector;
Calculate the power of the optical signal detected through the sensing unit at the wavelength input through the operation unit, and based on the test optical signal applied to the optical path through the failure point detection light source connector unit and the test optical signal detected through the sensing unit And a control unit for determining whether the optical path has failed or not. The method of claim 1,
And the control unit is configured to determine whether the power of the calculated optical signal is an optical signal power within a predetermined range that can communicate at the wavelength received through the operation unit integrated optical power meter. The method of claim 2,
A display unit for displaying whether the power of the calculated optical signal, the failure of the optical path and the power of the calculated optical signal are optical signal power within a predetermined range that can be communicated at a wavelength input through the operation unit; The breakdown detector integrated optical power meter further comprising. The method of claim 3,
Informing the user of the power of the calculated optical signal, whether the optical path is broken, and whether the power of the calculated optical signal is an optical signal power within a predetermined range that can communicate at a wavelength input through the operation unit. An alarm unit integrated optical power meter further comprising an alarm unit. The method of claim 3,
The controller determines that there is a failure point in the optical path when the difference between the power of the test optical signal applied to the optical path through the failure point detection light source connector unit and the power of the test optical signal detected through the detection unit is greater than or equal to a predetermined value. Advantage detector integrated optical power meter. The method of claim 5,
The wavelength input through the operation unit is any one of 1310nm, 1490nm, 1550nm fault point detector integrated optical power meter. The method of claim 6,
The display unit fault point detector integrated optical power meter having one or more LED lamps. The method of claim 7, wherein
The at least one LED lamp comprises a green LED and a red LED lamp,
The control unit controls to turn on the green LED lamp when the power of the calculated optical signal is an optical signal power within a predetermined range that can communicate at a wavelength input through the operation unit, and the power of the calculated optical signal is controlled by the operation unit. The red LED lamp is controlled to turn on unless the optical signal power is within a predetermined range that can be communicated at a wavelength input through the green light. Integrated optical power meter with fault detector that controls the lamp to turn on and off alternately with the red LED lamp. The method of claim 1,
The control unit is a power supply is applied, the failure point detector integrated optical power meter for estimating the power of the optical signal at a wavelength of 1490nm, if the wavelength is not input through the operation unit. 9. The method of claim 8,
The operation unit includes a failure point detection switch,
The control unit is a failure point detector integrated optical power meter to allow a light source to be applied to the light path through the failure point detection light source connector unit when the failure point detection switch is turned on (ON).

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