CN103647606A - GPON terminal transmitting-receiving-integrated optical assembly with RSSI function - Google Patents

GPON terminal transmitting-receiving-integrated optical assembly with RSSI function Download PDF

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Publication number
CN103647606A
CN103647606A CN201310613006.1A CN201310613006A CN103647606A CN 103647606 A CN103647606 A CN 103647606A CN 201310613006 A CN201310613006 A CN 201310613006A CN 103647606 A CN103647606 A CN 103647606A
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China
Prior art keywords
optical assembly
module
rssi
gpon
current source
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CN201310613006.1A
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Chinese (zh)
Inventor
刘少龙
韩泽胜
代新刚
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Shanghai Feixun Data Communication Technology Co Ltd
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Shanghai Feixun Data Communication Technology Co Ltd
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Priority to CN201310613006.1A priority Critical patent/CN103647606A/en
Publication of CN103647606A publication Critical patent/CN103647606A/en
Priority to PCT/CN2014/000840 priority patent/WO2015078091A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Light Receiving Elements (AREA)
  • Optical Communication System (AREA)

Abstract

The invention discloses a GPON terminal transmitting-receiving-integrated optical assembly with an RSSI function. The GPON terminal transmitting-receiving-integrated optical assembly comprises a receiving module, a wavelength division multiplexing module and a transmitting module which are connected with one another sequentially; the receiving module converts optical signals transmitted by an optical fiber into electrical signals; the transmitting module converts the electrical signals into optical signals and transmits the optical signals out; the wavelength division multiplexing module can realize single fiber bidirectional transmission through wavelength division multiplexing technology; and a mirror current source used for detecting signal strength is integrated inside the receiving module. According to the GPON terminal transmitting-receiving-integrated optical assembly with the RSSI function, the mirror current source is integrated inside the transmitting-receiving-integrated optical assembly, and therefore, a specialized RSSI pin can be provided and is directly connected to a GPON optical module main chip, and therefore, an RSSI monitoring circuit can be effectively simplified, and at the same time, the miniaturization and stability of a system can be improved.

Description

A kind of GPON terminal transceiver optical assembly with RSSI function
Technical field
The present invention relates to received signal strength and detect (RSSI) technology, relate in particular to a kind of GPON terminal transceiver optical assembly with RSSI function.
Background technology
The concept of EPON (PON) is long-standing, it have save fiber resource, to the transparent feature of procotol, in optical access network, playing the part of more and more important role.Meanwhile, ethernet technology, through the development of two more than ten years, with its simple and practical, cheap characteristic, has almost been ruled local area network (LAN) completely, and at the optimum carrier that is in fact proved to be to carry IP packet.Along with IP operation the continuous of proportion in metropolitan area and primary transmission risen, Ethernet is also being updated by aspects such as transmission rate, manageabilitys, to access, metropolitan area, even on backbone network, permeate gradually, and the combination of Ethernet and PON has just produced Ethernet passive optical network EPON/GPON.After EPON/GPON produces, high with its stability, reliability is high, can realize that remote accessing, network model up to 20km is unrestricted, broadband capable of dynamic adjustment, save the features such as optical fiber and optical transceiver and be used widely at optical communication field.
Traditional optical module only has photoelectric converting function and preposition across resistance enlarging function conventionally, and signal transmission distance is roughly estimated and obtained by utilizing emitted light power and receiving sensitivity.If want accurate measuring-signal normal transmission distance, need to build circuit for detecting intensity of received signal in receiving unit periphery, not only increased complexity in circuits but also used very inconvenient.Current EPON optical module has considered RSSI function to be integrated in light transmit-receive integrated optical assembly, discloses a kind of transceiver optical assembly for the integrated RSSI supervisory circuit of EPON terminal such as people such as Zhang Hua in patent CN201937594U.
At present, the GPON terminal transceiver optical assembly of applying on market does not generally have burst received signal strength indicator (RSSI) function, thereby just cannot directly to the communication link of system, monitor yet.Wang Runquan discloses a kind of optical module method for designing of using peripheral RSSI circuit in patent CN201523384U, but builds complexity and the Costco Wholesale that peripheral circuit has increased equipment.The people such as Zhang Hua disclose a kind of transceiver optical assembly for the integrated RSSI supervisory circuit of EPON terminal in patent CN201937594U, but also just for EPON terminal transceiver optical assembly, the difficulty that the light transmit-receive integrated optical assembly of GPON terminal still exists received signal strength to detect.
Summary of the invention
In view of this, the object of this invention is to provide a kind of GPON terminal transceiver optical assembly with RSSI function, mirror current source is integrated in to transceiver optical assembly inner, and provide special RSSI signal pins, can simplify to a great extent optical module design, improve the reliability of optical module, at the design aspect of intelligent optical module, have higher practical value.
In order to achieve the above object, the object of the invention is to be achieved through the following technical solutions:
A kind of GPON terminal transceiver optical assembly with RSSI function, wherein, comprise the receiver module, Wavelength division multiplexing module and the transmitter module that connect successively, described receiver module is converted to the signal of telecommunication by the light signal of coming through Optical Fiber Transmission, described transmitter module converts the electrical signal to light signal and launches, described Wavelength division multiplexing module is realized single fiber bi-directional by wavelength-division multiplex technique and is transmitted, the inner integrated mirror current source for detection of signal strength signal intensity of described receiver module.
The above-mentioned GPON terminal transceiver optical assembly with RSSI function, wherein, described receiver module also comprises: avalanche photodide and Trans-impedance preamplifier, described transmitter module comprises Multiple Quantum Well distributed feedback laser and diode backlight.
The above-mentioned GPON terminal transceiver optical assembly with RSSI function, wherein, described mirror current source is transistor circuit, and the output of 1:1 image current is provided.
The above-mentioned GPON terminal transceiver optical assembly with RSSI function, wherein, by the PNP pipe of four full symmetrics, the connected mode based on common-emitter common-base realizes described mirror current source.
The above-mentioned GPON terminal transceiver optical assembly with RSSI function, wherein, described Trans-impedance preamplifier adopts high input impedance negative feedback structure.
The above-mentioned GPON terminal transceiver optical assembly with RSSI function, wherein, it is inner that described mirror current source is integrated in transceiver optical assembly by the mode of discrete device or the mode of integrated circuit.
The above-mentioned GPON terminal transceiver optical assembly with RSSI function, wherein, adopts SFF encapsulation technology to encapsulate.
Compared with the prior art, beneficial effect of the present invention is:
GPON transceiver optical assembly with RSSI function in the present invention is inner by mirror current source being integrated in to transceiver optical assembly, can provide special RSSI pin to be connected directly to GPON optical module master chip, thereby effectively simplify RSSI supervisory circuit, also further improve miniaturization and the stability of system simultaneously; Integrated level is high, further reduces transceiver optical assembly peripheral circuit component number, reduces optical module volume and reduces costs, and reduces between circuit simultaneously and disturbs and improve the stability of a system.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the system configuration schematic block diagram of the GPON terminal transceiver optical assembly of band RSSI function of the present invention;
Fig. 2 is the pinout figure of the GPON terminal transceiver optical assembly of band RSSI function of the present invention;
Fig. 3 is the mirror current source circuit diagram of the GPON terminal transceiver optical assembly of band RSSI function of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.
With reference to Fig. 1, the GPON terminal transceiver optical assembly of band RSSI function of the present invention comprises receiver module, Wavelength division multiplexing module and the transmitter module connecting successively, receiver module is converted to the signal of telecommunication by the light signal of coming through Optical Fiber Transmission, transmitter module converts the electrical signal to light signal and launches, and Wavelength division multiplexing module is realized single fiber bi-directional by wavelength-division multiplex technique and transmitted.The inner integrated mirror current source for detection of signal strength signal intensity of receiver module.Receiver module comprises: mirror current source, avalanche photo diode (APD) and Trans-impedance preamplifier (TIA).
In a preferred embodiment of the invention, transmitter module mainly consists of Multiple Quantum Well distributed feedback laser (DFB-LD) and diode backlight, and wherein distributed feedback semiconductor laser (DFB-LD) is by the feedback that includes Bragg grating and realize light.Mirror current source is transistor circuit, and the output of 1:1 image current is provided.Particularly, mirror current source can adopt existing common-emitter common-base mirror current source to realize.
With reference to Fig. 2, the GPON terminal transceiver optical assembly of band RSSI function of the present invention has increased the RSSI pin with RSSI function, and general GPON terminal transceiver optical assembly is not with RSSI pin.
Particularly, receiving optical assembly is mainly comprised of mirror current source, photodiode and trans-impedance amplifier.Mirror current source adopts common-emitter common-base mirror current source, to realize the output of 1:1 image current.Avalanche photo diode (APD) is compared general PIN photodiode, and the great advantage of APD optical diode is to have multiplier effect, and APD need to apply higher reverse biased during work, will produce electron hole pair and be converted to electric current when receiving light signal.Trans-impedance amplifier adopts high input impedance negative feedback structure, has simplicity of design, bandwidth is higher and dynamic range is large feature, and the current signal that avalanche photodide can be generated convert voltage signal to, and by the appropriate level of its amplification.
With reference to figure 2, avalanche photodide APD is for being converted to the signal of telecommunication by the light signal receiving; Trans-impedance preamplifier TIA is for amplifying processing by the signal of telecommunication of avalanche photodide APD output; Mirror current source carries out 1:1 mirror image for the signal that described Trans-impedance preamplifier TIA is exported, and by the RSSI pin outgoing mirror image current with RSSI function, thereby realized the measuring ability of intensity to received signal.
Further, with reference to Fig. 3, common-emitter common-base mirror current source is comprised of the PNP pipe (PNP manages Q1, and PNP manages Q2, PNP pipe Q3 and PNP pipe Q4) of four full symmetrics, and concrete connected mode can, with reference to shown in figure 3, not repeat them here.
Those skilled in the art should be understood that: if the transistor characteristic shown in Fig. 3 in circuit is consistent, and mirror image output current I 0through theory, derive as follows:
I 0 = I REF 1 + 4 β + 2 β 2 ≈ I REF 1 + 4 β
Because β is very large, so can be approximately I 0≈ I rEF.As shown in Figure 3, mirror current source is used APD bias voltage V1, by the outside booster circuit of transceiver optical assembly, is provided and is passed through its APD external pin (V1) access transceiver optical assembly; Mirror current source is used on APD bias voltage V2(figure and cannot be marked), by transceiver optical assembly inside, provide (not shown on figure); Image current output I 0, by the RSSI pin of transceiver optical assembly, pick out.
In a preferred embodiment of the invention, by Wavelength division multiplexing module, realize utilizing emitted light signal transmitted in both directions in simple optical fiber that receiving optical signals that wavelength is 1310nm and wavelength are 1490nm, wavelength can be adjusted according to actual needs.
Assembly employing SFF(Small Form Factor of the present invention) encapsulation technology, separately can be described as little encapsulation technology, can not affect under the prerequisite of processor performance, package dimension is reduced into 40% left and right of common size.
In specific design process, about mirror current source, can select common-emitter common-base mirror current source, also can replace with other mirror current source.About avalanche photodide bias voltage, can be according to selecting specifications and the side circuit of device to adjust flexibly, about mirror current source, be integrated in transceiver optical assembly inner, can be integrated by the mode of discrete device, also can be integrated by the mode of integrated circuit.
From above-described embodiment, can find out, advantage of the present invention is:
Transceiver optical assembly with RSSI function in the present invention is inner by mirror current source being integrated in to transceiver optical assembly, and provides special RSSI pin to be connected directly to GPON optical module master chip, thereby effectively simplifies RSSI supervisory circuit; Because this transceiver optical assembly integrated level is high, further reduce transceiver optical assembly peripheral circuit component number, reduce optical module volume and reduce costs, reduce between circuit simultaneously and disturb and improve the stability of a system.
Above specific embodiments of the invention be have been described in detail, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.

Claims (7)

1. the GPON terminal transceiver optical assembly with RSSI function, it is characterized in that, comprise the receiver module, Wavelength division multiplexing module and the transmitter module that connect successively, described receiver module is converted to the signal of telecommunication by the light signal of coming through Optical Fiber Transmission, described transmitter module converts the electrical signal to light signal and launches, described Wavelength division multiplexing module is realized single fiber bi-directional by wavelength-division multiplex technique and is transmitted, the inner integrated mirror current source for detection of signal strength signal intensity of described receiver module.
2. according to claim 1 with the GPON terminal transceiver optical assembly of RSSI function, it is characterized in that, described receiver module also comprises: avalanche photodide and Trans-impedance preamplifier, described transmitter module comprises Multiple Quantum Well distributed feedback laser and diode backlight.
3. according to claim 2 with the GPON terminal transceiver optical assembly of RSSI function, it is characterized in that, described mirror current source is transistor circuit, and the output of 1:1 image current is provided.
4. according to claim 3 with the GPON terminal transceiver optical assembly of RSSI function, it is characterized in that, by the PNP pipe of four full symmetrics, the connected mode based on common-emitter common-base realizes described mirror current source.
5. according to claim 2 with the GPON terminal transceiver optical assembly of RSSI function, it is characterized in that, described Trans-impedance preamplifier adopts high input impedance negative feedback structure.
6. according to claim 1 with the GPON terminal transceiver optical assembly of RSSI function, it is characterized in that, it is inner that described mirror current source is integrated in transceiver optical assembly by the mode of discrete device or the mode of integrated circuit.
7. according to claim 1 with the GPON terminal transceiver optical assembly of RSSI function, it is characterized in that, adopt SFF encapsulation technology to encapsulate.
CN201310613006.1A 2013-11-26 2013-11-26 GPON terminal transmitting-receiving-integrated optical assembly with RSSI function Pending CN103647606A (en)

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CN201310613006.1A CN103647606A (en) 2013-11-26 2013-11-26 GPON terminal transmitting-receiving-integrated optical assembly with RSSI function
PCT/CN2014/000840 WO2015078091A1 (en) 2013-11-26 2014-09-15 Gpon terminal optical transceiver assembly with rssi function

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2015078091A1 (en) * 2013-11-26 2015-06-04 上海斐讯数据通信技术有限公司 Gpon terminal optical transceiver assembly with rssi function
CN105471497A (en) * 2015-11-20 2016-04-06 中航海信光电技术有限公司 Method and device for predicting service life of parallel optical module in open-loop mode
CN108768534A (en) * 2018-06-27 2018-11-06 湖北自贸区东芯科技有限公司 A kind of light transmit-receive integrated component

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CN111431611B (en) * 2020-03-19 2022-09-09 青岛海信宽带多媒体技术有限公司 Optical module
CN115622630A (en) * 2021-07-15 2023-01-17 中兴通讯股份有限公司 Single-fiber bidirectional optical module, high-baud-rate signal transmission method and 5G forward transmission network

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Publication number Priority date Publication date Assignee Title
WO2015078091A1 (en) * 2013-11-26 2015-06-04 上海斐讯数据通信技术有限公司 Gpon terminal optical transceiver assembly with rssi function
CN105471497A (en) * 2015-11-20 2016-04-06 中航海信光电技术有限公司 Method and device for predicting service life of parallel optical module in open-loop mode
CN105471497B (en) * 2015-11-20 2017-12-19 中航海信光电技术有限公司 Method and device for predicting service life of parallel optical module in open-loop mode
CN108768534A (en) * 2018-06-27 2018-11-06 湖北自贸区东芯科技有限公司 A kind of light transmit-receive integrated component

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