KR20130068304A

KR20130068304A - Coded fbg used optical connector

Info

Publication number: KR20130068304A
Application number: KR1020110135335A
Authority: KR
Inventors: 윤재순; 이경신; 최기선; 백세종; 임기건
Original assignee: (주)럭스콤
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2013-06-26

Abstract

PURPOSE: An optical connector using a coded optical fiber Bragg grating filter is provided to be used as a sensor for sensing an optical line by being able to discriminate subscribers without regard to distance information by giving a spectrum tag using a plurality of fiber Bragg gratings. CONSTITUTION: A corresponding optical connector is installed by inserting a plurality of fiber Bragg gratings into a ferrule. The plurality of fiber Bragg gratings is coded to discriminate optical subscribers by giving a spectrum tag which specifies a half wavelength. A reflection wavelength of the optical connector is inputted to a spectrometer by an optical circulator, and checks a line of a corresponding subscriber by giving a code to discriminate the optical subscriber as to the specific spectrum tag resulted from the spectrum result corresponding to the established pitch interval.

Description

Optical connector using coded fiber grating filter {CODED FBG USED OPTICAL CONNECTOR}

The present invention relates to an optical connector using a coded fiber bragg grating (FBG) filter, and more particularly, to identify subscribers regardless of distance information by assigning a spectral tag that can be identified using a plurality of FBGs. The present invention relates to an optical connector using a coded optical fiber grating filter that can be used as a sensor for monitoring a light path.

Currently, OTDR (Optical Time Domain Reflectometer) is the most commonly used monitoring device for the operation and maintenance of optical fiber for optical subscriber network.

In this method, the monitoring filter device is inserted in a specific part of the optical path section, and the reflected light received through the reflection of the termination filter is measured by the base station to determine whether it is in normal operation, the location of the fault site, and the bending or It is used to obtain a lot of information such as old age.

However, this method is useful for monitoring transmission intervals with a point-to-point structure, but in a passive optical network (PON) with a point-to-multipoint structure, all branches with one OTDR It is not easy to monitor the fiber.

This is because the traces of backscattered light coming back from the end of the individual branch fiber can overlap each other.

As a result, efforts have been made to improve the resolution of the OTDR, but ultimately, the line length cannot be solved without overlapping between the subscribers at a distance greater than the resolution of the OTDR.

Moreover, when a subscriber applies for service at an unspecified location, it is not easy to find a way to adjust the length every time, and accurate line length information is needed to check the line information on the optical subscriber network. Due to this, there were many structural difficulties in determining the optical subscriber based on the distance information of the OTDR.

For example, the OTDR generates different monitoring pulses with time difference and calculates the time required when the pulse signal is reflected and returns, and measures the distance. The length information of is different from the actual distance information.

Therefore, based on the length information obtained from the OTDR, the telecommunication company identifies the optical subscribers through the GIS and the telecommunication company DB and determines the abnormality of the optical path.The length information obtained from the OTDR shows a difference from the actual distance information. In such a dense area, there was a problem that it was extremely difficult to identify the optical subscriber.

The present invention has been made to solve the above-described problems, by assigning a spectral tag that can be identified using a plurality of FBG for each subscriber to identify the subscriber regardless of the distance information can be utilized as a sensor for monitoring the light beam An optical connector using a coded fiber grating filter is provided.

In order to solve the above problems, the present invention provides an optical connector installed at an end of an optical subscriber network and reflecting an optical signal for monitoring, wherein the optical connector is configured to reflect reflected wavelengths by pitch intervals of incoming light when the optical signal for monitoring is input. It is characterized in that a plurality of optical fiber gratings (FBGs), which are coded so as to distinguish the optical subscribers by assigning specific spectrum tags, are inserted in a ferrule.

The spectrum tag is characterized by assigning a spectral tag that can be identified using two optical fiber grids every 32 quarters of the E-PON standard.

The optical signal for monitoring is characterized in that the wavelength of 1610 ~ 1640nm.

The monitoring optical signal is characterized in that the wavelength of 1635 ~ 1665 nm.

The optical connector is characterized in that the SC type, FC type, LC type or MU type.

Receiving the reflection wavelength of the optical connector through the optical circulator is characterized by spectral spectroscopy with a spectroscope to give an identification code for distinguishing the optical subscriber.

The optical fiber grating is characterized in that at least two or more are embedded in the ferrol.

According to the present invention, by assigning a spectral tag that can be identified using a plurality of FBGs for each subscriber, subscribers can be identified regardless of distance information.

Therefore, the FTTH modem equipped with the coded FBG filter and the spectral tag method for identifying the same have the effect of introducing a surveillance system capable of efficiently managing subscriber networks even in dense areas such as urban areas.

1 is an illustration of an optical connector using a coded fiber grating filter in accordance with the present invention;
2 is an exemplary diagram for subscriber tag assignment of an optical connector using a coded fiber grating filter according to the present invention;
3 is an example of checking whether the optical connector is disconnected using the coded optical fiber grating filter according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the optical connector using a coded optical fiber grating filter according to the present invention.

First, the present invention is preferably applied to an optical connector installed at the end of an optical subscriber network and reflecting an optical signal for monitoring.

1 to 3, the optical connector according to the present invention is a plurality of optical fiber grating for encoding the spectrum of the incoming light when the input of the monitoring optical signal to distinguish the optical subscriber by assigning a specific wavelength tag of the reflected wavelength by the pitch interval (FBG) is inserted into the ferrule.

In the above technical configuration, the reflection wavelength of the optical connector is introduced into the spectrometer by the optical circulator, and the spectral result corresponding to the preset spectral pitch interval is derived.

Therefore, by assigning a code for identifying the optical subscriber to the derived specific spectrum tag it is possible to identify the line of the subscriber.

Looking at the relationship between the multiplexed spectrum and each subscriber with reference to FIG. 3, it is possible to confirm that the optical paths of the subscribers 1 and 3 given to the spectral wavelengths are disconnected because the spectrums of λ1 and λ3 are not derived.

In the above technical configuration, the spectral tag is assigned a spectral tag that can be identified using two optical fiber gratings every 32 quarters of the E-PON standard.

Accordingly, even in the future, as the subscriber network increases, the base station may establish a monitoring network simply by adding additional equipment.

In addition, the present invention is suitably applied to the 1610 ~ 1640nm wavelength and 1635 ~ 1665nm wavelength as the optical signal for monitoring, it can be applied to various optical connectors such as SC type, FC type, LC type or MU type.

a: ferrule

Claims

In the optical connector installed at the end of the optical subscriber network to reflect the optical signal for monitoring,
In the optical connector, a plurality of optical fiber gratings (FBGs) are encoded in a ferrule to encode the spectrum of incoming light when the optical signal for monitoring is input so that the wavelength can be distinguished by assigning a specific spectrum tag to the wavelength of reflection. An optical connector using a coded fiber grating filter, characterized in that.

The method of claim 1,
The spectral tag is an optical connector using a coded fiber grating filter, characterized in that the spectral tag is assigned to identify the spectral tag using two optical fiber grids every 32 branches of the E-PON.

The method of claim 1,
And said monitoring optical signal is a 1610-1640 nm wavelength optical connector using a coded fiber grating filter.

The method of claim 1,
And said monitoring optical signal has a wavelength of 1635-1665 nm.

The method of claim 1,
The optical connector is SC type, FC type, LC type or MU type optical connector using a coded fiber grating filter, characterized in that.

The method of claim 1,
The optical connector using an optical fiber grating filter, characterized in that the reflection wavelength of the optical connector is introduced through the optical circulator and the spectrum spectroscopic spectroscopic spectrometer with a spectrometer to give an identification code to distinguish the optical subscriber.

The method of claim 1,
The optical fiber grating is an optical connector using an optical fiber grating filter, characterized in that at least two or more are embedded in the panel.