Detector and test method for optical fiber breakpoint in EPON (Ethernet Passive Optical Network)
A technology of breakpoint detection and detector, applied in the direction of electrical components, electromagnetic wave transmission system, transmission system, etc., can solve problems such as complicated operation, and achieve the effect of simple operation, extremely low cost, and simple structure
Inactive Publication Date: 2015-10-07
CHINA TELECOM CORP LTD
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Problems solved by technology
During the test, it is usually necessary to be equipped with a long jumper pigtail to eliminate the detection blind area, which is complicated to operate and has certain technical requirements.
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[0040] Such as figure 2 As shown, the hardware platform of EPON comprehensive analyzer is shown in the dotted box, including touch screen (including LCD), micro control system based on ARM7 CPU, EPON OLT optical module and EPON ONU optical module. The solid line box is the optical fiber breakpoint detector, which includes 1310nm wavelength optical signal amplifier and optical splitter. Between d and e is the optical fiber under test, where point d is the end of the user's incoming fiber, and point e is the breakpoint or end of the incoming fiber to the optical splitter, that is, the reflection point.
[0041] The touch screen (including LCD) is mainly used to display the results and accept user input. In the graphical interface, the refractive index of the tested fiber can be input, the length of the tested fiber (breakpoint position) can be displayed, and the button to start or stop the test;
[0042] The micro-control system based on ARM7 CPU is the control and calculation...
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The invention discloses a detector for an optical fiber breakpoint, which comprises an EPON (Ethernet Passive Optical Network) analyzer, a tee optical splitter and an optical fiber jumper, wherein the EPON analyzer comprises an EPON OLT (Optical Line Terminal) optical module and an EPON ONU (Optical Network Unit) optical module; the EPON OLT optical module is connected to a first end of the tee optical splitter through an optical fiber, the EPON ONU optical module is connected to a second end of the tee optical splitter, one end of the optical fiber jumper is connected to a third end of the tee optical splitter, and the other end of the optical fiber jumper is connected to the tail end of a detected optical fiber; and the tee optical splitter is used for splitting optical signals reflected from a breakpoint of the detected optical fiber into two beams, one beam is spread towards the direction of the EPON OLT optical module, and the other beam is spread towards the direction of the EPON ONU optical module. The invention further discloses a corresponding test method. According to the invention, improvement is carried out on an existing EPON instrument, the structure is simple, the cost is low, operation is carried out easily, and a technical blank of short-distance optical fiber breakpoint testing is made up.
Description
technical field [0001] The invention relates to the field of optical fiber communication, in particular to an optical fiber breakpoint detector and a detection method. Background technique [0002] Ethernet Passive Optical Network (EPON) is a single-fiber bidirectional optical access network using a point-to-multipoint (P2MP) structure, and its typical topology is a tree. The EPON system consists of an optical line terminal (OLT) on the office side, an optical network unit (ONU) on the user side, and an optical distribution network (ODN). It is a single-fiber bidirectional system. In the downlink direction (OLT to ONU), the signal sent by the OLT reaches each ONU through the ODN. In the upstream direction (ONU to OLT), the signal sent by the ONU will only reach the OLT, and will not reach other ONUs. In order to avoid data conflicts and improve network utilization efficiency, the upstream direction adopts a time division multiple access (TDMA) method and arbitrates the dat...
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IPC IPC(8): H04B10/075
Inventor 唐维东
Owner CHINA TELECOM CORP LTD