CN102868446B - A kind of OLT optical module using couple APD to share booster circuit - Google Patents
A kind of OLT optical module using couple APD to share booster circuit Download PDFInfo
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- CN102868446B CN102868446B CN201210350479.2A CN201210350479A CN102868446B CN 102868446 B CN102868446 B CN 102868446B CN 201210350479 A CN201210350479 A CN 201210350479A CN 102868446 B CN102868446 B CN 102868446B
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Abstract
The invention discloses a kind of OLT optical module using couple APD to share booster circuit, comprise the driver, optical transceiving device and the limiting amplifier that connect successively, be connected with OTDR module between described optical transceiving device and described driver, described optical transceiving device comprises laser, optical branching device, wavelength division multiplexer WDM, an APD receiver and the 2nd APD receiver; A described APD receiver is connected same road booster circuit with the 2nd APD receiver.Optical module of the present invention improves optical fiber OTDR test performance, and two receivers share a road booster circuit simultaneously, and in whole optical module, circuit module reduces, and has saved the space of circuit board, has reduced the Material Cost of optical module.
Description
Technical field
The present invention relates to technical field of photo communication, particularly a kind of OLT optical module using couple APD to share booster circuit.
Background technology
In the current information age, optical fiber cable is destroyed the communication accidental interruption caused will produce immeasurable loss, in order to reduce the loss, need to monitor the abnormal conditions in fibre circuit, and alarm, loss be dropped to minimum.In order to ensure the reliability of transmission information, OTDR technology must be adopted to carry out real-time monitoring to the performance of optical networks fibre.OTDR monitoring equipment used is at present all test signal be coupled in passive optical network by wavelength division multiplexer WDM in OLT device outside.Be used alone OTDR equipment at present and carry out Real-Time Monitoring to the performance of optical fiber, OTDR equipment price general charged is all higher, adds cost.
In order to reduce costs, be integrated in OLT optical module by OTDR monitoring function in prior art, utilize the OLT optical module of integrated OTDR monitoring function to carry out real-time monitoring to the performance of optical fiber, cost reduces.The structured flowchart of the OLT optical module of existing integrated OTDR monitoring function as shown in Figure 2, wherein, receiver 1 adopts avalanche photodide APD, receiver 2 adopts PN homojunction photodiode PIN, the OTDR dynamic range of this optical module is lower, in order to improve OTDR dynamic range, receiver 2 need adopt APD photodiode.But due to inner integrated two the APD photodiodes of optical module, just needing two-way booster circuit to be respectively two APD provides higher negater circuit, but two-way booster circuit must take more circuit board space and cause Material Cost to improve.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency existing in prior art, provide the two APD of use of a kind of OTDR of raising dynamic range, saving circuit board space and reduction Material Cost to share the OLT optical module of booster circuit.
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of OLT optical module using couple APD to share booster circuit, comprise the driver, optical transceiving device and the limiting amplifier that connect successively, be connected with OTDR module between described optical transceiving device and described driver, described optical transceiving device comprises laser, optical branching device, wavelength division multiplexer WDM, an APD receiver and the 2nd APD receiver; A described APD receiver is connected same road booster circuit with the 2nd APD receiver.
Wherein, described laser is luminous under described driver drives; The light that laser sends is divided into multichannel through described optical branching device, and multi-path light enters after described wavelength division multiplexer closes ripple and outputs in optical fiber; From the light in optical fiber after the wavelength division multiplexer WDM partial wave in this optical module, a road light receives through an APD receiver, exports after limiting amplifier amplifies; Another road enters in described OTDR module carry out optical fiber property test through described optical branching device, the 2nd APD receiver successively, and OTDR CMOS macro cell test curve also exports and reports.
Described OTDR module comprise connect successively signal acquisition circuit, pulses generation and signal processing circuit, pulse driving circuit; Described signal acquisition circuit input connects the 2nd APD receiver output, and described pulse driving circuit output connects the input of described laser.
Preferably, described booster circuit connects a described APD receiver by the first resistance, biasing circuit successively; Described booster circuit connects described 2nd APD receiver by the second resistance, bleeder circuit successively.
Further, described biasing circuit is mirror current source.
Above-mentionedly comprise 1310nm light that ONT in optical-fiber network sends and the 1490nm light that fiber reflection is returned from the light in optical fiber, 1310nm light, after wavelength division multiplexer WDM partial wave, is received by an APD receiver, exports after limiting amplifier amplifies; 1490nm light enters in described OTDR module carry out optical fiber property test through described optical branching device, the 2nd APD receiver successively.
compared with prior art, beneficial effect of the present invention:
In optical module of the present invention, two receivers all adopt avalanche photodide APD receiver, and an APD receiver is connected same road booster circuit with the 2nd APD receiver, APD receiver sensitivity is good, dynamic range is high, improve optical fiber OTDR test performance, two receivers share a road booster circuit simultaneously, and in whole optical module, circuit module reduces, save the space of circuit board, reduce the Material Cost of optical module.
accompanying drawing illustrates:
Fig. 1 is existing OLT optical module structure block diagram.
Fig. 2 is the structured flowchart that the two APD of use of the present invention shares the OLT optical module of booster circuit.
Fig. 3 is that in OLT optical module of the present invention, booster circuit is connected block diagram with circuit between an APD receiver and the 2nd APD receiver.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
As shown in Figure 2, the two APD of use of the present invention shares the OLT optical module of booster circuit, comprise the driver, optical transceiving device and the limiting amplifier that connect successively, be connected with OTDR module between described optical transceiving device and described driver, described optical transceiving device comprises laser, optical branching device, wavelength division multiplexer WDM, an APD receiver and the 2nd APD receiver; A described APD receiver is connected same road booster circuit with the 2nd APD receiver.
Wherein, described laser is luminous under described driver drives; The light that laser sends is divided into multichannel through described optical branching device, and multi-path light enters after described wavelength division multiplexer closes ripple and outputs in optical fiber; From the light in optical fiber after the wavelength division multiplexer WDM partial wave in this optical module, a road light receives through an APD receiver, exports after limiting amplifier amplifies; Another road enters in described OTDR module carry out optical fiber property test through described optical branching device, the 2nd APD receiver successively, and OTDR CMOS macro cell test curve also exports and reports.Above-mentionedly comprise 1310nm light that optical networks network terminal ONT sends and the 1490nm light that fiber reflection is returned from the light in optical fiber, 1310nm light, after wavelength division multiplexer WDM partial wave, is received by an APD receiver, exports after limiting amplifier amplifies; 1490nm light enters in described OTDR module carry out optical fiber property test through described optical branching device, the 2nd APD receiver successively.
Concrete, described OTDR module comprise connect successively signal acquisition circuit, pulses generation and signal processing circuit, pulse driving circuit; Described signal acquisition circuit input connects the second avalanche photodide output, and described pulse driving circuit output connects the input of described laser.During work, the pulse driving circuit of OTDR inside modules produces light pulse signal, this light pulse signal is utilized to carry out premodulated to the data-signal that driver exports, then drive laser is luminous, i.e. 1490nm light, 1490nm light is successively through optical branching device Splitter, wavelength division multiplexer enters in optical fiber, the 1490nm light that fiber reflection is returned is by 1:9 optical branching device, the signal of telecommunication is converted to through the 2nd APD receiver, signal acquisition circuit in OTDR module gathers this signal of telecommunication, obtain the data of a series of sampled point, each data represent the reflected optical power value of certain point in optical fiber.Enter the distance of end as abscissa, the reflected optical power value of each sampled point, as ordinate, obtains the relation of optical fiber attenuation and length, thus reflects the performance of tested optical fiber.
Consult Fig. 2 and Fig. 3, preferably, described booster circuit connects a described APD receiver by the first resistance, biasing circuit successively, provides reverse voltage to an APD receiver; Described booster circuit connects described 2nd APD receiver, for the 2nd APD receiver provides reverse voltage by the second resistance, bleeder circuit successively.Wherein, described biasing circuit adopts mirror current source.In integrated circuits, in order to provide suitable bias current to each amplifying stage, determining quiescent point at different levels, usually using biasing circuit.Common biasing circuit has mirror current source, and mirror current source effectively eliminates ectocine to stablize an APD receiver, makes an APD receiver operation in optimum state, improves devices function performance.
In optical module of the present invention, two receivers all adopt avalanche photodide APD receiver, and an APD receiver is connected same road booster circuit with the 2nd APD receiver, APD receiver sensitivity is good, dynamic range is high, improve optical fiber OTDR test performance, two receivers share a road booster circuit simultaneously, and in whole optical module, circuit module reduces, save the space of circuit board, reduce the Material Cost of optical module.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. one kind uses two APD to share the OLT optical module of booster circuit, comprise the driver, optical transceiving device and the limiting amplifier that connect successively, OTDR module is connected with between described optical transceiving device and described driver, it is characterized in that, described optical transceiving device comprises laser, optical branching device, wavelength division multiplexer WDM, an APD receiver and the 2nd APD receiver; A described APD receiver is connected same road booster circuit with the 2nd APD receiver; Described booster circuit connects a described APD receiver by the first resistance, biasing circuit successively; Described booster circuit connects described 2nd APD receiver by the second resistance, bleeder circuit successively;
Wherein, described laser is luminous under described driver drives; The light that laser sends is divided into multichannel through described optical branching device, and multi-path light enters after described wavelength division multiplexer closes ripple and outputs in optical fiber; From the light in optical fiber after the wavelength division multiplexer WDM partial wave in this optical module, a road light receives through an APD receiver, exports after limiting amplifier amplifies; Another road light enters in described OTDR module carry out optical fiber property test through described optical branching device, the 2nd APD receiver successively, and OTDR CMOS macro cell test curve also exports and reports.
2. the two APD of use according to claim 1 shares the OLT optical module of booster circuit, it is characterized in that, described OTDR module comprise connect successively signal acquisition circuit, pulses generation and signal processing circuit, pulse driving circuit; Described signal acquisition circuit input connects the 2nd APD receiver output, and described pulse driving circuit output connects the input of described laser.
3. the two APD of use according to claim 1 shares the OLT optical module of booster circuit, and it is characterized in that, described biasing circuit is mirror current source.
4. the two APD of use according to claim 3 shares the OLT optical module of booster circuit, it is characterized in that, 1310nm light that ONT in optical-fiber network sends and the 1490nm light that fiber reflection is returned is comprised from the light in optical fiber, 1310nm light is after wavelength division multiplexer WDM partial wave, received by an APD receiver, export after limiting amplifier amplifies; 1490nm light enters in described OTDR module carry out optical fiber property test through described optical branching device, the 2nd APD receiver successively.
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| CN201210350479.2A CN102868446B (en) | 2012-09-20 | 2012-09-20 | A kind of OLT optical module using couple APD to share booster circuit |
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| CN201210350479.2A CN102868446B (en) | 2012-09-20 | 2012-09-20 | A kind of OLT optical module using couple APD to share booster circuit |
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| CN102868446B true CN102868446B (en) | 2015-08-12 |
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| CN106466175A (en) * | 2015-08-14 | 2017-03-01 | 黄富滨 | The intelligent ring of the outer liquid ion relative concentration of measurement human body cell |
| CN110726919B (en) * | 2019-10-25 | 2021-10-26 | 中国电子科技集团公司第四十四研究所 | Array APD photoelectric parameter testing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170309A (en) * | 2011-03-24 | 2011-08-31 | 索尔思光电（成都）有限公司 | Optical line terminal (OLT) optical module integrating optical time domain reflectometer (OTDR) monitoring function |
| CN102356573A (en) * | 2011-08-18 | 2012-02-15 | 华为技术有限公司 | Optical sending and receiving component and optical sending and receiving module |
| CN102386967A (en) * | 2011-10-12 | 2012-03-21 | 成都优博创技术有限公司 | Reverse biasing circuit of dual channel optical module avalanche photodiode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100663462B1 (en) * | 2005-11-23 | 2007-01-02 | 삼성전자주식회사 | Optical passive network |
| US8724102B2 (en) * | 2010-12-22 | 2014-05-13 | Telefonaktièbolaget LM Ericsson (publ) | Optical time domain reflectometry (OTDR) trace analysis in PON systems |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170309A (en) * | 2011-03-24 | 2011-08-31 | 索尔思光电（成都）有限公司 | Optical line terminal (OLT) optical module integrating optical time domain reflectometer (OTDR) monitoring function |
| CN102356573A (en) * | 2011-08-18 | 2012-02-15 | 华为技术有限公司 | Optical sending and receiving component and optical sending and receiving module |
| CN102386967A (en) * | 2011-10-12 | 2012-03-21 | 成都优博创技术有限公司 | Reverse biasing circuit of dual channel optical module avalanche photodiode |
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