CN202841136U - RFoG optical node for triple-play networks - Google Patents
RFoG optical node for triple-play networks Download PDFInfo
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- CN202841136U CN202841136U CN 201220348931 CN201220348931U CN202841136U CN 202841136 U CN202841136 U CN 202841136U CN 201220348931 CN201220348931 CN 201220348931 CN 201220348931 U CN201220348931 U CN 201220348931U CN 202841136 U CN202841136 U CN 202841136U
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Abstract
Disclosed is an RFoG optical node for triple-play networks, comprising a four-wavelength component, wherein the four-wavelength component is respectively connected with an upstream burst mode optical transmission circuit and a downstream optical AGC circuit, the upstream burst mode optical transmission circuit and the downstream optical AGC circuit are respectively connected with a bilateral filter, and the output end of the bilateral filter is connected with an optical fiber for outputting cable television signals. The RFoG optical node for triple-play networks has the advantages that the optical AGC circuit is adopted downstream to achieve the function of constant radio frequency level output so as to provide convenience for network design and maintenance; and the burst mode optical transmission circuit is adopted upstream to enable one upstream optical receiver to carry a plurality of upstream optical transmitters so as to realize a point-to-multipoint network architecture which is consistent with the network architecture of an EPON system and enables the convergence of a cable television network and an EPON network to be easy in technology.
Description
Technical field
The utility model belongs to the optical communication technique field, is specifically related to a kind of RFoG optical node that is applied to integration of three networks network.
Background technology
At present, be applied to the optical node of integration of three networks network, such as Chinese utility model patent CN201440659U " a kind of four wavelength WDM type cable television bidirectional optical nodes ", open day is on April 21st, 2010.Descending reception 1550nm wavelength light signal, up employing 1590nm wavelength emission, transmission cable TV signal; With the EPON signal of the synthetic 1490nm wavelength of WDM wavelength division multiplexer and 1310nm wavelength, realize that four wavelength light signals transmit in same optical fiber.This technology also comes with some shortcomings in actual applications.Descending Optical Receivers part in this technical scheme is the linear light reception on the one hand, and output level is along with received optical power changes and linear change, and received optical power changes 1dB, and output level changes 2dB.Along with the development of network light entering and copper back, optical node quantity is more and more, and the received optical power scope is more and more wider, thereby causes each optical node output level difference large, brings difficulty for network design and maintenance.Up light emission module in this technical scheme partly is traditional continuous light emission mode work on the other hand, and the light of going is on the way launched on the way capable light-receiving of correspondence, i.e. be point to point connect between light emission and light-receiving; And be point-to-multipoint between the head end OLT of EPON signal and the user side ONU, 1 OLT can be with 32 ONU.Signal on cable TV transmission and the transmission of EPON signal are just inconsistent on the network architecture like this.
Summary of the invention
The purpose of this utility model is to provide a kind of wavelength division multiplexer wherein built-in, passes through I
2C interface provides the RFoG optical node that is applied to integration of three networks network of equipment operation webmaster parameter.
For reaching the goal of the invention the technical solution adopted in the utility model be:
A kind of RFoG optical node that is applied to integration of three networks network is characterized in that: comprise and input and output 1550nm﹠amp; 1610nm wavelength cable TV light signal and 1310nm﹠amp; The four wavelength assemblies that the optical fiber of 1490nm wavelength telecommunications ONU light signal connects, described four wavelength assemblies link to each other with uplink burst mode light radiating circuit, descending smooth agc circuit respectively, described uplink burst mode light radiating circuit, descending smooth agc circuit link to each other with bidirectional filter respectively, and described bidirectional filter output links to each other with the optical fiber of output cable TV signal;
Described four wavelength assemblies are used for first transmission 1550nm﹠amp; The cable TV light signal of 1610nm wavelength reflects 1310nm﹠amp simultaneously; 1490nm wavelength telecommunications ONU light signal is exported to telecommunications ONU module, the cable TV light signal of transmission 1550 nm wavelength again, and light signal is converted to radio-frequency signal of wired TV exports to descending smooth agc circuit, receive simultaneously the up radiofrequency signal of uplink burst mode light radiating circuit emission, and up radiofrequency signal is converted to the light signal reflection output of 1610nm wavelength;
Described descending smooth agc circuit is used for receiving the radio-frequency signal of wired TV of four wavelength assemblies output, and adjusts the level of radio-frequency signal of wired TV, and the radio-frequency signal of wired TV after will adjusting is exported to the high go side of bidirectional filter;
Described bidirectional filter is used for and will exports to the optical fiber of output cable TV signal from common port from the radio-frequency signal of wired TV that the descending smooth agc circuit that the high pass termination is received is adjusted level, and will export to uplink burst mode light radiating circuit through low go side from the up radiofrequency signal of common port input;
Described uplink burst mode light radiating circuit is used for and will exports to four wavelength assemblies from the up radiofrequency signal that the low pass termination of bidirectional filter is received.
Further, described four wavelength assemblies comprise first wave division multiplexer, Second Wave division multiplexer, photo-detector, laser, described Second Wave division multiplexer is connected to the transmission end of first wave division multiplexer, described photo-detector is connected to the transmission end of Second Wave division multiplexer, described laser is connected to the reflection end of Second Wave division multiplexer, and described first wave division multiplexer is used for transmission 1550nm﹠amp; The cable TV light signal of 1610nm wavelength reflects 1310nm﹠amp simultaneously; 1490nm wavelength telecommunications ONU light signal is exported to telecommunications ONU module; Described Second Wave division multiplexer is used for the cable TV light signal of transmission 1550 nm wavelength and the light signal of reflection output 1610nm wavelength; Described photo-detector is used for that the cable TV light signal of 1550 nm wavelength is converted to radio-frequency signal of wired TV and exports to descending smooth agc circuit; Described laser is used for receiving the up radiofrequency signal of uplink burst mode light radiating circuit emission, and up radiofrequency signal is converted to the light signal of 1610nm wavelength.
The beneficial effects of the utility model are mainly manifested in: because descending employing light agc circuit, the function of realization radio frequency level constant output brings convenience for network design and maintenance; Up employing burst mode optical transmission circuit, so that 1 up optical receiver can be with a plurality of up optical senders, realize the network architecture of point-to-multipoint, consistent with the network architecture of EPON system, technically so that the fusion of cable TV network and EPON network becomes simple.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model.
Fig. 2 is the structural representation of four wavelength assemblies of the present utility model.
Embodiment
Come the utility model is further specified below in conjunction with specific embodiment, but the utility model is not confined to these embodiments.One skilled in the art would recognize that the utility model contained all alternatives, improvement project and the equivalents that may comprise in claims scope.
With reference to Fig. 1, Fig. 2, a kind of RFoG optical node that is applied to integration of three networks network comprises and input and output 1550nm﹠amp; 1610nm wavelength cable TV light signal and 1310nm﹠amp; The four wavelength assemblies 1 that the optical fiber of 1490nm wavelength telecommunications ONU light signal connects, described four wavelength assemblies 1 link to each other with uplink burst mode light radiating circuit 2, descending smooth agc circuit 4 respectively, described uplink burst mode light radiating circuit 2, descending smooth agc circuit 4 link to each other with bidirectional filter 3 respectively, and described bidirectional filter 3 outputs link to each other with the optical fiber of output cable TV signal;
Described four wavelength assemblies 1 are used for first transmission 1550nm﹠amp; The cable TV light signal of 1610nm wavelength reflects 1310nm﹠amp simultaneously; 1490nm wavelength telecommunications ONU light signal is exported to telecommunications ONU module, the cable TV light signal of transmission 1550 nm wavelength again, and light signal is converted to radio-frequency signal of wired TV exports to descending smooth agc circuit 4, receive simultaneously the up radiofrequency signal of uplink burst mode light radiating circuit 2 emissions, and up radiofrequency signal is converted to the light signal reflection output of 1610nm wavelength;
Described descending smooth agc circuit 4 is used for receiving the radio-frequency signal of wired TV of four wavelength assemblies, 1 output, and adjusts the level of radio-frequency signal of wired TV, and the radio-frequency signal of wired TV after will adjusting is exported to the high go side of bidirectional filter 3;
Described bidirectional filter 3 is used for and will exports to optical fiber and the level monitoring circuit 5 of output cable TV signal from common port from the radio-frequency signal of wired TV that the descending smooth agc circuit 4 that the high pass termination is received is adjusted levels, and will export to uplink burst mode light radiating circuit through low go side from the up radiofrequency signal of common port input;
Described uplink burst mode light radiating circuit 2 is used for and will exports to four wavelength assemblies 1 from the up radiofrequency signal that the low pass termination of bidirectional filter is received.
Described four wavelength assemblies 1 comprise first wave division multiplexer 11, Second Wave division multiplexer 12, photo-detector 13, laser 14, described Second Wave division multiplexer 12 is connected to the transmission end of first wave division multiplexer 11, described photo-detector 13 is connected to the transmission end of Second Wave division multiplexer 12, described laser 14 is connected to the reflection end of Second Wave division multiplexer 12, and described first wave division multiplexer 11 is used for transmission 1550nm﹠amp; The cable TV light signal of 1610nm wavelength reflects 1310nm﹠amp simultaneously; 1490nm wavelength telecommunications ONU light signal is exported to telecommunications ONU module; Described Second Wave division multiplexer 12 is used for the cable TV light signal of transmission 1550 nm wavelength and the light signal of reflection output 1610nm wavelength; Described photo-detector 13 is used for that the cable TV light signal of 1550 nm wavelength is converted to radio-frequency signal of wired TV and exports to descending smooth agc circuit 4; Described laser 14 is used for receiving the up radiofrequency signal of uplink burst mode light radiating circuit 2 emissions, and up radiofrequency signal is converted to the light signal of 1610nm wavelength.
Four wavelength assemblies 1 in the present embodiment adopt the ZBL-SA-D6110B-5B-2R type four wavelength assemblies of Guangdian Science ﹠ Technology Co., Ltd., Zhejiang; It is patentee's Chinese utility model patent CN202160180U " the data feedback channel burst mode optical transmission circuit that is used for the radio frequency network on the optical fiber " that uplink burst mode light radiating circuit 4 adopts Guangdian Science ﹠ Technology Co., Ltd., Zhejiang, this circuit can arrange respectively to be opened level threshold and turn-offs level threshold, from opening to turn-off one section transitional level scope is arranged, thereby make based on the uplink signal transmissions of optical burst-mode more stable; Simultaneously can guarantee again to open time delay≤1.3 μ s, turn-off time delay≤1.6 μ s, the burst characteristic of this circuit can satisfy the requirement of Data Transmission Feature in the DOCSIS3.0 standard fully; Bidirectional filter 3 adopts the ZBB5PD series bidirectional filter of Guangdian Science ﹠ Technology Co., Ltd., Zhejiang; It is patentee's Chinese utility model patent CN202218196U " a kind of light AGC control circuit for cable television photo-receiver " that descending smooth agc circuit 2 adopts Guangdian Science ﹠ Technology Co., Ltd., Zhejiang, this circuit can be realized: when input optical power-7dBm-+when changing between the 2dBm, the output level rate of change is controlled at ± 0.5dB in.
Claims (2)
1. a RFoG optical node that is applied to integration of three networks network is characterized in that: comprise and input and output 1550nm﹠amp; 1610nm wavelength cable TV light signal and 1310nm﹠amp; The four wavelength assemblies that the optical fiber of 1490nm wavelength telecommunications ONU light signal connects, described four wavelength assemblies link to each other with uplink burst mode light radiating circuit, descending smooth agc circuit respectively, described uplink burst mode light radiating circuit, descending smooth agc circuit link to each other with bidirectional filter respectively, and described bidirectional filter output links to each other with the optical fiber of output cable TV signal;
Described four wavelength assemblies are used for first transmission 1550nm﹠amp; The cable TV light signal of 1610nm wavelength reflects 1310nm﹠amp simultaneously; 1490nm wavelength telecommunications ONU light signal is exported to telecommunications ONU module, the cable TV light signal of transmission 1550 nm wavelength again, and light signal is converted to radio-frequency signal of wired TV exports to descending smooth agc circuit, receive simultaneously the up radiofrequency signal of uplink burst mode light radiating circuit emission, and up radiofrequency signal is converted to the light signal reflection output of 1610nm wavelength;
Described descending smooth agc circuit is used for receiving the radio-frequency signal of wired TV of four wavelength assemblies output, and adjusts the level of radio-frequency signal of wired TV, and the radio-frequency signal of wired TV after will adjusting is exported to the high go side of bidirectional filter;
Described bidirectional filter is used for and will exports to the optical fiber of output cable TV signal from common port from the radio-frequency signal of wired TV that the descending smooth agc circuit that the high pass termination is received is adjusted level, and will export to uplink burst mode light radiating circuit through low go side from the up radiofrequency signal of common port input;
Described uplink burst mode light radiating circuit is used for and will exports to four wavelength assemblies from the up radiofrequency signal that the low pass termination of bidirectional filter is received.
2. a kind of RFoG optical node that is applied to integration of three networks network according to claim 1, it is characterized in that: described four wavelength assemblies comprise first wave division multiplexer, Second Wave division multiplexer, photo-detector, laser, described Second Wave division multiplexer is connected to the transmission end of first wave division multiplexer, described photo-detector is connected to the transmission end of Second Wave division multiplexer, described laser is connected to the reflection end of Second Wave division multiplexer, and described first wave division multiplexer is used for transmission 1550nm﹠amp; The cable TV light signal of 1610nm wavelength reflects 1310nm﹠amp simultaneously; 1490nm wavelength telecommunications ONU light signal is exported to telecommunications ONU module; Described Second Wave division multiplexer is used for the cable TV light signal of transmission 1550 nm wavelength and the light signal of reflection output 1610nm wavelength; Described photo-detector is used for that the cable TV light signal of 1550 nm wavelength is converted to radio-frequency signal of wired TV and exports to descending smooth agc circuit; Described laser is used for receiving the up radiofrequency signal of uplink burst mode light radiating circuit emission, and up radiofrequency signal is converted to the light signal of 1610nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220348931 CN202841136U (en) | 2012-07-18 | 2012-07-18 | RFoG optical node for triple-play networks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220348931 CN202841136U (en) | 2012-07-18 | 2012-07-18 | RFoG optical node for triple-play networks |
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| CN202841136U true CN202841136U (en) | 2013-03-27 |
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| CN 201220348931 Expired - Lifetime CN202841136U (en) | 2012-07-18 | 2012-07-18 | RFoG optical node for triple-play networks |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015164045A1 (en) * | 2014-04-21 | 2015-10-29 | Arris Enterprises, Inc. | Active optical combiner for catv network |
| US9686014B2 (en) | 2014-04-21 | 2017-06-20 | Arris Enterprises Llc | Optical and RF techniques for aggregation of photo diode arrays |
| US9847836B2 (en) | 2016-03-01 | 2017-12-19 | Arris Enterprises Llc | Agrregator-based cost-optimized communications topology for a point-to-multipoint network |
-
2012
- 2012-07-18 CN CN 201220348931 patent/CN202841136U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015164045A1 (en) * | 2014-04-21 | 2015-10-29 | Arris Enterprises, Inc. | Active optical combiner for catv network |
| US9590732B2 (en) | 2014-04-21 | 2017-03-07 | Arris Enterprises, Inc. | Active optical combiner for CATV network |
| US9686014B2 (en) | 2014-04-21 | 2017-06-20 | Arris Enterprises Llc | Optical and RF techniques for aggregation of photo diode arrays |
| US9793994B2 (en) | 2014-04-21 | 2017-10-17 | Arris Enterprises Llc | Systems and methods for burst detection in a CATV network |
| US10250959B2 (en) | 2014-04-21 | 2019-04-02 | Arris Enterprises Llc | Optical and RF techniques for aggregation of photo diode arrays |
| US10432310B2 (en) | 2014-04-21 | 2019-10-01 | Arris Enterprises Llc | Systems and methods for optical modulation index calibration in a CATV network |
| US10790902B2 (en) | 2014-04-21 | 2020-09-29 | Arris Enterprises Llc | Systems and methods for optical modulation index calibration in a CATV network |
| US11362734B2 (en) | 2014-04-21 | 2022-06-14 | Arris Enterprises Llc | Systems and methods for optical modulation index calibration in a CATV network |
| US9847836B2 (en) | 2016-03-01 | 2017-12-19 | Arris Enterprises Llc | Agrregator-based cost-optimized communications topology for a point-to-multipoint network |
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Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |