CN216217362U

CN216217362U - Passive PON network detection device based on semi-active mode

Info

Publication number: CN216217362U
Application number: CN202121751971.1U
Authority: CN
Inventors: 王猛; 董周峰; 谢鑫
Original assignee: Shanghai Grandway Telecom Tech Co ltd
Current assignee: Shanghai Grandway Telecom Tech Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-04-05
Anticipated expiration: 2031-07-30

Abstract

The utility model relates to a passive PON network detection device based on a semi-active mode, which comprises a wavelength division multiplexer, an optical splitter and an active processing module, wherein the OLT end, the wavelength division multiplexer and the active processing module of a passive PON network are sequentially connected, and the optical splitter is connected with the ONU end, the wavelength division multiplexer and the active processing module of the passive PON network; the common end of the wavelength division multiplexer is connected with the OLT end; all downlink light from an OLT end is input into an active processing module, the active processing module forwards the downlink light to an ONU end through an optical splitter, the optical splitter transmits most of the uplink light from the ONU end to the OLT end through a wavelength division multiplexer, and a small part of the uplink light is input into the active processing module to form a complete PON optical link, and the active processing module detects the uplink light and the downlink light input into the passive optical link. Compared with the prior art, the utility model reduces the cost, and balances the application range and the total power consumption compared with a passive serial connection mode and a full-active serial connection mode.

Description

Passive PON network detection device based on semi-active mode

Technical Field

The utility model relates to a passive PON (passive optical network) detection device, in particular to a passive PON detection device based on a semi-active mode.

Background

With the popularization of fiber to the home, the investment for maintaining a huge network is higher and higher. Meanwhile, with the development of the internet, the demand for network bandwidth is increasing day by day, the implementation of various selective services, the consideration of the economic cost of network upgrading and reconstruction and the like, the 10G passive PON network is gradually popularized, the rapid development of GPON/E passive PON network users, and the problem of splitter household resource inventory brings great trouble to the maintenance of the passive PON network of an operator, so that the cost for the operator to maintain the passive PON network resources is higher and higher. In order to check the home optical network, an operator needs to perform data identification on the home optical fiber and perform passive PON network combing through the data.

The passive PON network structure is shown in fig. 4, a primary optical splitter and a secondary optical splitter are disposed between a local end (OLT) and a user end (ONU), and the current passive PON network detection method mainly includes a passive tandem connection mode and a full active tandem connection mode;

as shown in fig. 2, the passive serial data testing apparatus has a schematic structural diagram, an 2/8 optical splitter is connected between an office end (OLT) and a user end (ONU), and a 2/8 optical splitter inputs a small part of uplink and downlink light on an optical path to a data reading and processing module to realize data acquisition and analysis, and this way uses a passive serial connection mode for data acquisition, and is low in cost, however, the passive series connection mode is that the optical splitter is used for respectively receiving a small amount of downlink light and uplink light for analysis (the light attenuation of the incoming light receiver is about 10 dB), the light attenuation of the main path is within 1.5dB, since the initial light intensity of the downlink light is about +5dBm and the initial uplink light is about +3dBm, in order to make the received light power in the resolvable range (-8dBm to-26 dBm), therefore, the measurement between one minute and two minutes is required, so that the passive serial data testing device can only be used after the first-stage optical splitter and before the second-stage optical splitter.

As shown in fig. 3, a schematic structural diagram of the all-active serial data testing apparatus is shown in fig. 3, where a data reading processing module is connected in series between an office end (OLT) and a user end (ONU), attenuation modules are connected in series between the data reading processing module and the office end (OLT) and between the data reading processing module and the user end (ONU), and all of the uplink and downlink light in the optical path is input to the data reading processing module.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a passive PON network detection device based on a semi-active mode, which reduces the cost and balances the application range and the total power consumption compared with a passive serial connection mode and a full-active serial connection mode.

The purpose of the utility model can be realized by the following technical scheme:

a passive PON network detection device based on a semi-active mode comprises a wavelength division multiplexer, an optical splitter and an active processing module, wherein the OLT end, the wavelength division multiplexer and the active processing module of the passive PON network are sequentially connected, and the optical splitter is connected with the ONU end, the wavelength division multiplexer and the active processing module of the passive PON network;

the public end of the wavelength division multiplexer is connected with the OLT end of the passive PON network;

all downlink light from the passive PON network OLT end is input into an active processing module, the active processing module forwards the downlink light to the passive PON network ONU end through an optical splitter, the optical splitter inputs most of the uplink light from the passive PON network ONU end into the passive PON network OLT end through a wavelength division multiplexer, a small part of the uplink light is input into the active processing module to form a complete PON optical link, and the active processing module detects the uplink light and the downlink light input into the active processing module.

Further, the active processing module comprises an FPGA processor.

Furthermore, the active processing module further comprises an optical receiving module and an OLT optical transceiver module, wherein the optical receiving module is connected with the FPGA processor, the OLT optical transceiver module is connected with the wavelength division multiplexer, and the optical receiving module is connected with the optical splitter.

Furthermore, the active processing module further comprises an MCU, and the FPGA processor is connected with the MCU.

Furthermore, the active processing module further comprises a wireless module connected with the MCU.

Further, the wireless module is WIFI or Bluetooth.

Furthermore, the active processing module also comprises a human-computer interaction module connected with the MCU.

Furthermore, the human-computer interaction module comprises a liquid crystal touch screen.

Furthermore, the optical splitter is of a fused biconical taper structure.

Furthermore, the splitting ratio of the optical splitter is 95% to 5%.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the passive PON network detection device comprises a wavelength division multiplexer, an optical splitter and an active processing module, wherein a passive PON network OLT end, the wavelength division multiplexer and the active processing module are sequentially connected, the optical splitter is connected with a passive PON network ONU end, the wavelength division multiplexer and the active processing module, the common end of the wavelength division multiplexer is connected with the passive PON network OLT end, all downlink light from the passive PON network OLT end is input into the active processing module, the active processing module forwards the downlink light to the passive PON network ONU end through the optical splitter, the optical splitter inputs most of uplink light from the passive PON network ONU end into the passive PON network OLT end through the wavelength division multiplexer, and a small part of the uplink light is input into the active processing module to form a complete PON optical link, the active processing module detects the uplink light and the downlink light input into the active processing module, and the optical link of the passive PON network contains uplink light and downlink light with different wavelengths, the wavelength division multiplexer separates and polymerizes uplink light and downlink light with different wavelengths, the uplink light and the downlink light are coupled to the same optical fiber of an optical line at the common end of the wavelength division multiplexer for transmission, the passive PON network detection device adopts a semi-active mode, can be applied behind a first-stage optical splitter or a second-stage optical splitter of a passive PON network, expands the working range relative to a passive serial mode, and only needs to forward the downlink light by an active processing module relative to a full-active serial mode, so that the power consumption is greatly reduced;

(2) the optical branching device has the attenuation function on the downlink light input into the optical branching device, only has small attenuation on the uplink light input into the optical branching device, does not need an adjustable attenuator, and reduces the cost;

(3) the active processing module also comprises an MCU (micro control unit), a wireless module and a human-computer interaction module, wherein the wireless module and the human-computer interaction module are connected with the MCU, the FPGA processor is connected with the MCU, the wireless module is WIFI or Bluetooth, the human-computer interaction module comprises a liquid crystal touch screen, the FPGA processor detects according to received uplink light and downlink light and sends a detection result to the MCU, and the MCU can transmit the detection result to the mobile terminal through the wireless module and can also check the detection result through the liquid crystal touch screen.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a passive serial data testing apparatus;

FIG. 3 is a schematic diagram of a fully active serial data testing apparatus;

fig. 4 is a schematic diagram of a passive PON network structure;

fig. 5 is a schematic structural diagram of an active processing module.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

A passive PON network detection device based on a semi-active mode is shown in figure 1 and comprises a wavelength division multiplexer, an optical splitter and an active processing module, wherein an OLT (optical line terminal) end of a passive PON network, the wavelength division multiplexer and the active processing module are sequentially connected, and the optical splitter is connected with an ONU (optical network unit) end of the passive PON network, the wavelength division multiplexer and the active processing module;

all downlink light from the passive PON network OLT end is input into an active processing module, the active processing module forwards the downlink light to the passive PON network ONU end through an optical splitter, the optical splitter inputs most of uplink light from the passive PON network ONU end into the passive PON network OLT end through a wavelength division multiplexer, and a small part of the uplink light is input into the active processing module to form a complete PON optical link, and the active processing module detects the uplink light and the downlink light input into the active processing module;

for the current passive PON network, the downstream light in the optical line includes optical carrier signals with two wavelengths of 1490nm and 1577nm, the upstream light includes optical carrier signals with two wavelengths of 1310nm and 1270nm,

the wavelength division multiplexer separates and aggregates optical carrier signals with 4 different wavelengths, and uplink light and downlink light at the common end of the wavelength division multiplexer are coupled to the same optical fiber of the optical line for transmission;

the passive PON network detection device adopts a semi-active mode, can be applied behind a primary optical splitter or a secondary optical splitter of a passive PON network, expands the working range relative to a passive serial connection mode, and only needs to forward downlink light by an active processing module relative to a full-active serial connection mode, so that the power consumption is greatly reduced;

the optical splitter has an attenuation function (the attenuation is 12dB) on the downlink light input into the optical splitter, and only has small attenuation (the attenuation is less than 1.5dB) on the uplink light input into the optical splitter, so that an adjustable attenuator is not needed, and the cost is reduced.

As shown in fig. 5, the active processing module includes an FPGA processor, and an optical receiving module and an OLT optical transceiver module connected to the FPGA processor, where the OLT optical transceiver module is connected to the wavelength division multiplexer, and the optical receiving module is connected to the optical splitter.

The active processing module further comprises an MCU, a wireless module and a human-computer interaction module, the wireless module and the human-computer interaction module are connected with the MCU, the wireless module is WIFI or Bluetooth, the human-computer interaction module comprises a liquid crystal touch screen, the FPGA processor detects according to received uplink light and downlink light and sends detection results to the MCU, the MCU can transmit the detection results to the mobile terminal through the wireless module, and the detection results can also be checked through the liquid crystal touch screen.

The optical splitter is in a fused biconical taper structure, the splitting ratio of the optical splitter is 95% to 5%, the attenuation of the 95% to 95% end of the optical splitter is about 0.3dB, the attenuation of the WDM is about 0.6dB, the total loss can be controlled within 1.5dB, and the attenuation of the 95% to 5% end of the optical splitter is about 15 dB.

The embodiment provides a passive PON network detection device based on a semi-active mode, which adopts the semi-active mode, can be applied behind a primary optical splitter or a secondary optical splitter of a passive PON network, enlarges the working range compared with the passive series connection mode, and compared with the full-active series connection mode, an active processing module only needs to forward downlink light, greatly reduces the power consumption, and an optical splitter has an attenuation function on the downlink light input into the optical splitter and only has small attenuation on the uplink light input into the optical splitter, so that an adjustable attenuator is not needed, and the cost is reduced.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A passive PON network detection device based on a semi-active mode is characterized by comprising a wavelength division multiplexer, an optical splitter and an active processing module, wherein the OLT end, the wavelength division multiplexer and the active processing module of the passive PON network are sequentially connected, and the optical splitter is connected with the ONU end, the wavelength division multiplexer and the active processing module of the passive PON network;

2. The apparatus of claim 1, wherein the active processing module comprises an FPGA processor.

3. The device as claimed in claim 2, wherein the active processing module further comprises an optical receiving module and an OLT optical transceiver module, the optical receiving module is connected to the FPGA processor, the OLT optical transceiver module is connected to the wavelength division multiplexer, and the OLT optical transceiver module is connected to the optical splitter.

4. The passive PON network detection device according to claim 2, wherein the active processing module further comprises an MCU, and the FPGA processor is connected to the MCU.

5. The device of claim 4, wherein the active processing module further comprises a wireless module connected to the MCU.

6. The device of claim 5, wherein the wireless module is WIFI or Bluetooth.

7. The passive PON network detection device according to claim 4, wherein the active processing module further comprises a human-computer interaction module connected to the MCU.

8. The passive PON network detection device according to claim 7, wherein the human-computer interaction module comprises a liquid crystal touch screen.

9. The passive PON network detection device according to claim 1, wherein the optical splitter has a fused biconical taper structure.

10. The apparatus as claimed in claim 1, wherein the splitter ratio of the optical splitter is 95% to 5%.