CN2549496Y - Erbium dosed optical fiber amplifier - Google Patents
Erbium dosed optical fiber amplifier Download PDFInfo
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- CN2549496Y CN2549496Y CN 02237118 CN02237118U CN2549496Y CN 2549496 Y CN2549496 Y CN 2549496Y CN 02237118 CN02237118 CN 02237118 CN 02237118 U CN02237118 U CN 02237118U CN 2549496 Y CN2549496 Y CN 2549496Y
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- doped fiber
- edfa
- fiber amplifier
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Abstract
The utility model relates to an erbium dosed optical fiber amplifier which includes pumped lasers, a WDM combiner and an erbium dosed optical fiber EDF. The utility model is characterized in that two or more pumped lasers are connected with an optical sourceless element and form the multiples of various pump lights to promote the erbium dosed optical fiber EDF; the optical sourceless element is a pumping combiner which couples two pumping light sources with a certain wavelength discontinuity and used in the positive pumping; the optical sourceless element is a pumping coupler which outputs two pumping lights through an output port of the pumping coupler to the two pumped light source, with each way having a pumped light which has two wavelengths with a certain proportion, and the pumping coupler is used in a bidirectonal pumping; the optical sourceless element can be the combined use of the pumping combiner and the pumping coupler. The utility model is mature in technical process, low in cost and applicable for the optical fiber communication system, in particular for the intensive WDM system which is long in distance and large in capacity.
Description
Technical field
The utility model relates to optics, relates in particular to a kind of Erbium-Doped Fiber Amplifier (EDFA).
Background technology
Wavelength-division multiplex is a kind of new multiplex mode in the optical fiber communication, transmit the more light carrier of multichannel in the optical fiber simultaneously, the capacity of optical fiber communication can be significantly improved, the successful Application of Erbium-Doped Fiber Amplifier (EDFA) EDFA, impel dense wave division multipurpose DWDM can really bring into play long distance, jumbo transmitting effect, thereby avoiding making uses up/regenerator that electricity and electricity/light are changed, realize full light transmission.
Erbium-Doped Fiber Amplifier (EDFA) is called for short EDFA, be Erbium-Dopped Fiber Amplifier, be a kind of be medium with Er-doped fiber EDF, with the pump light is the image intensifer of driving source, it is as the critical component of optical communication system of new generation, have that gain is high, output power is big, work optical bandwidth broad, with polarization irrelevant, noise figure lower, amplification characteristic and advantages such as systematic bits rate and data layout have nothing to do.As shown in Figure 1,, Erbium-Doped Fiber Amplifier (EDFA) can be divided into power amplifier, line amplifier or prime amplifier, be positioned over the diverse location of system respectively according to the different requirements of system to gain, output power and noise figure.
According to application different in system, the design of Erbium-Doped Fiber Amplifier (EDFA) has three kinds of basic structures usually, i.e. forward pumping, backward pumping and two directional pump are respectively as Fig. 2, Fig. 3, shown in Figure 4.So-called forward pumping also claims the forward direction pumping, and as shown in Figure 2, expression pump light and flashlight pass through Er-doped fiber EDF with equidirectional; Backward pumping also claims backward pump, as shown in Figure 3, represents that then pump light and flashlight are in the opposite direction by Er-doped fiber EDF; Pump light then passes through Er-doped fiber EDF simultaneously at both direction in the two directional pump structure, as shown in Figure 4.
Adopt the Erbium-Doped Fiber Amplifier (EDFA) of forward pumping to have lower noise figure, so system's more this kind of employing structure is because prime amplifier, promptly pumping configuration as shown in Figure 2.In order to make Erbium-Doped Fiber Amplifier (EDFA) have the characteristic of low noise and high saturated output simultaneously, adopt the structure of two directional pump mostly, as shown in Figure 4.The independent backward pumping structure of less use in the design of present Erbium-Doped Fiber Amplifier (EDFA).
The technology of dense wave division multipurpose dwdm system is used on the net at long distance line in a large number, and in the transmission line of long distance, as connect between website and website optical relay---the reliability of Erbium-Doped Fiber Amplifier (EDFA) is particularly important, if in case occur that Erbium-Doped Fiber Amplifier (EDFA) lost efficacy then the interruption that can cause all transport services.
From the basic block diagram of Erbium-Doped Fiber Amplifier (EDFA) as can be known, the basic components and parts that constitute Erbium-Doped Fiber Amplifier (EDFA) comprise Er-doped fiber EDF, pump laser, wave division multiplexing WDM wave multiplexer and isolator etc., constitute from it, Er-doped fiber EDF has the reliability the same with Transmission Fibers, and optical passive components such as WDM wave multiplexer and isolator are based on the technology of fused biconical taper and plated film, technical maturity, not only external at present more producer can provide this type of device, domesticly also reaches a certain scale on the production and selling of this type of device.
Therefore; output beam quality and reliability as the pump laser of the driving source of Erbium-Doped Fiber Amplifier (EDFA) then seem even more important; pump laser is an electrooptical device that static is very responsive; no matter in manually-operated; in the communications and transportation also or dry running environment all can have certain buildup of static electricity; when static surpasses the ability to bear of its chip; will cause pump laser to lose efficacy; thereby make the Erbium-Doped Fiber Amplifier (EDFA) cisco unity malfunction; therefore; the reliability of Erbium-Doped Fiber Amplifier (EDFA) concentrates on the reliability of pumping; the reliability of pumping is not high in the existing Erbium-Doped Fiber Amplifier (EDFA); if pump laser lost efficacy; Erbium-Doped Fiber Amplifier (EDFA) does not only have the light amplification conduct; and can be owing to the strong absorption of erbium fibre to flashlight; thereby increase the circuit Insertion Loss; signal can't normally be received; in order to reach the function of pumping protection; also having suggestion operator of laser instrument producer to reduce the pump power specification uses; in the hope of strengthening the long-term reliability of Erbium-Doped Fiber Amplifier (EDFA) EDFA; but this can increase the cost of Erbium-Doped Fiber Amplifier (EDFA) EDFA again greatly, and can't finally solve the influence that pump laser lost efficacy system is moved.
Summary of the invention
The Erbium-Doped Fiber Amplifier (EDFA) that provides a kind of reliability high is provided the purpose of this utility model.
The technical scheme that the utility model adopted is: this Erbium-Doped Fiber Amplifier (EDFA), comprise pump laser, wave division multiplexing WDM wave multiplexer, Er-doped fiber EDF, it is characterized in that: two or more pump lasers are connected with optical passive component, two or more pump light sources encourage Er-doped fiber EDF jointly through forming multiplexing between Different Light behind the optical passive components.
Optical passive component is the pumping wave multiplexer, and two two pump light source λ 1, λ 2 with certain wavelength interval are coupled; Optical passive component is a pumping coupler, to two pump light sources, has the pump light of a certain proportion of two wavelength on pumping coupler output port output two-way and every road; The pumping wave multiplexer is used for forward pumping; Pumping coupler is used for two directional pump; Optical passive component is the compound use of pumping wave multiplexer and pumping coupler.
The beneficial effects of the utility model are: in the utility model; two or more pump light sources realize the multiplexing of different pumping by pumping wave multiplexer or pumping coupler; common excitation Er-doped fiber; when a pump light source lost efficacy in the pump light source; though whole gain is reduced; but can not make whole Erbium-Doped Fiber Amplifier (EDFA) complete failure; and can guarantee the operate as normal of certain channel; therefore; adopt the pumping protection of this utility model can improve the reliability of Erbium-Doped Fiber Amplifier (EDFA); and the utility model does not need extra backup pumping source; original performance index that can keep Erbium-Doped Fiber Amplifier (EDFA) in the design; the pumping wave multiplexer and the pumping coupler that adopt belong to optical passive component, technical maturity; cost is low; the reliability height has improved practicality of the present utility model and functional reliability.
In a word; the utility model is realized the multiplexing common excitation Er-doped fiber of two or more pump light sources by pumping wave multiplexer and pumping coupler; realized the pumping protection of Erbium-Doped Fiber Amplifier (EDFA); and then improved the functional reliability of Erbium-Doped Fiber Amplifier (EDFA); the utility model technical maturity, cost are low; be applicable to optical fiber telecommunications system, especially be fit to long distance, jumbo dense wavelength division multiplexing system.
Description of drawings
Fig. 1 is the application synoptic diagram of Erbium-Doped Fiber Amplifier (EDFA) in wavelength-division multiplex system;
Fig. 2 is the forward pumping synoptic diagram;
Fig. 3 is the backward pumping synoptic diagram;
Fig. 4 is the two directional pump synoptic diagram;
Fig. 5 is a pumping wave multiplexer principle schematic;
Fig. 6 is the pumping coupler principle schematic;
Fig. 7 uses synoptic diagram for the pumping wave multiplexer;
Whole channels when Fig. 8 lost efficacy for a pump light source in the pumping wave multiplexer---gain synoptic diagram
When Fig. 9 lost efficacy for a pump light source in the pumping wave multiplexer,---whole channels when gain and operate as normal---gain contrast synoptic diagram through the adjustment rear section of pumping working current channel;
Figure 10 uses synoptic diagram for pumping coupler;
Figure 11 is whole channels---the gain synoptic diagram of pump light source in the pumping coupler when losing efficacy;
Figure 12 is pump light source in the pumping coupler when losing efficacy, through the adjustment rear section of pumping working current channel---gain with operate as normal time whole channels---gain contrast synoptic diagram.
Embodiment
With embodiment the utility model is described in further detail with reference to the accompanying drawings below:
Embodiment 1:
According to Fig. 5 and Fig. 7; the utility model comprises pump laser; the wave division multiplexing WDM wave multiplexer; Er-doped fiber EDF and isolator; two pump lasers are connected with the pumping wave multiplexer; export two pump light source λ 1 respectively from pump laser; form the multiplexing of different pumping behind the λ 2 process pumping wave multiplexers; common excitation Er-doped fiber EDF; as shown in Figure 5: the pumping wave multiplexer; be Pumpcombiner; realize two wavelength pump light λ 1; λ's 2 is multiplexing; its channel bandwidth depends on the interval of two pumping wavelengths; realize that technology mainly contains fused biconical taper and coating technique, as shown in Figure 7, the pumping wave multiplexer is used for the forward pumping protection of single pumping configuration.
In the Erbium-Doped Fiber Amplifier (EDFA) of this structure, an input end pump laser in the pumping wave multiplexer lost efficacy, when being one of them pump light source inefficacy, its whole channels---gain situation shows as about the gain reduction 3dB of gain than the normal channel working point of the medium and small side's point of Fig. 9 representative of each channel as shown in Figure 8, though gain reduces, by the circuit adjustment, still, may influence reception at the range of receiving of receiver, but interrupting service suddenly is not convenient to safeguard; And in the design that does not have pumping protection; as shown in Figure 2; after pump laser lost efficacy; because Er-doped fiber is to the absorption of flashlight; Erbium-Doped Fiber Amplifier (EDFA) EDFA shows as an Insertion Loss module; thereby cause the system line Insertion Loss very big, flashlight passes through the basic all losses of this Erbium-Doped Fiber Amplifier (EDFA) EDFA totally, let alone terminal has received.
In the present embodiment, when a pump light of pumping wave multiplexer lost efficacy, can be by adjusting the working current of another one pump light, can guarantee the normal gain of local channel, as shown in Figure 9, can guarantee the normal gain of 1/3rd above channels when having only a pump light effective, the gain situation of the whole channels when the little Fang Dian among Fig. 9 represents operate as normal, channel is unit with the wavelength, large circle point was represented when a pump light lost efficacy, the channel gain situation behind the working current of adjustment another one pump light.
Embodiment 2:
According to Fig. 6 and Figure 10, the utility model comprises pump laser, wave division multiplexing WDM wave multiplexer, Er-doped fiber EDF and isolator, two pump lasers are connected with pumping coupler, export two pump light sources respectively through pumping coupler from pump laser, after pumping coupler output port output two-way and every road have the pump light of a certain proportion of two wavelength, form the multiplexing of different pumping, encourage Er-doped fiber EDF jointly.As shown in Figure 6, pumping coupler, be Pump coupler, multiplexing to two pump lasers, and carry out power division at two output terminals, thereby has corresponding a certain proportion of multiplexing pump light on the every road of pumping coupler output port, this two-way output is respectively α * LD1/ (1+ α) and LD2/ (1+ α), and LD1/ (1+ α) and α * LD2/ (1+ α), pumping coupler can be imported the pump light source of two identical or different wavelength, realize the closing of power/minute, this realization technology with pumping coupler of 2 of certain splitting ratio * 2 four ports is mainly the fused biconical taper technology, in the present embodiment, pumping coupler is used for two directional pump, as shown in figure 10, realize the beam split of certain proportion α at two output ports, that is to say, can proportionally export two multiplexing pump lights simultaneously, jointly Er-doped fiber is encouraged from each output port.
Erbium-Doped Fiber Amplifier (EDFA) for this two directional pump structure, comparison diagram 4 and Figure 10, present embodiment has only increased by a pumping coupler, pumping coupler by reasonable splitting ratio α, just can realize the pumping light power that each output port is set, as can be seen from Figure 10, any one output port for pumping coupler all has two a certain proportion of multiplexing pump lights respectively, even therefore there is a pump laser to lose efficacy, when being one of them pump light source inefficacy, even if the pump light source of forward structure lost efficacy, because both forward and reverse directions still has the pump light of another pump laser, can not cause the rapid deterioration of Optical Signal To Noise Ratio, and just full gain reduces, as shown in figure 11, can not cause signal interruption; And in common two directional pump shown in Figure 4, the pumping reliability of first pump laser is to the output characteristics of whole amplifier, comprise gain and noise etc., influence greatly, Erbium-Doped Fiber Amplifier (EDFA) for Fig. 4 structure, when first pumping was lost efficacy, even then the pump laser of back can operate as normal, then not only to show as gain very low for Ci Shi Erbium-Doped Fiber Amplifier (EDFA), and show as noise figure and improve, thus the severe exacerbation signal quality, even can evoke near the intense noise of Erbium-Doped Fiber Amplifier (EDFA) 1530nm, thereby the signal to noise ratio (S/N ratio) of the signal after amplifying that deteriorated significantly causes terminal normally to receive, and still can show as signal interruption.
Equally, when a pump light source lost efficacy, can guarantee the normal gain of local channel, as shown in figure 12, can guarantee full channel normal gain more than half by adjusting the working current of another pump light source.The gain situation of the channel when the little Fang Dian among Figure 12 represents operate as normal, large circle point representative are adjusted the gain situation of the channel behind the working current of another pump light when a pump light inefficacy.
Below just introduced the multiplexing protected mode of basic pump light in the Erbium-Doped Fiber Amplifier (EDFA); the just combination of the different modes on basic structure of Erbium-Doped Fiber Amplifier (EDFA) for some somewhat complex design; can use being used in combination of pumping wave multiplexer and coupling mechanism; its principle of work and mode and the above are similar, do not give unnecessary details at this.
Claims (6)
1. Erbium-Doped Fiber Amplifier (EDFA), comprise pump laser, wave division multiplexing WDM wave multiplexer, Er-doped fiber EDF, it is characterized in that: two or more pump lasers are connected with optical passive component, two or more pump light sources encourage Er-doped fiber (EDF) jointly through forming the multiplexing of different pumping behind the optical passive component.
2. Erbium-Doped Fiber Amplifier (EDFA) according to claim 1 is characterized in that: described optical passive component is the pumping wave multiplexer, and two two pump light sources (λ 1), (λ 2) with certain wavelength interval are coupled.
3. Erbium-Doped Fiber Amplifier (EDFA) according to claim 1, it is characterized in that: described optical passive component is a pumping coupler, to two pump light sources, has the pump light of a certain proportion of two wavelength on pumping coupler output port output two-way and every road.
4. Erbium-Doped Fiber Amplifier (EDFA) according to claim 2 is characterized in that: described pumping wave multiplexer is used for forward pumping.
5. Erbium-Doped Fiber Amplifier (EDFA) according to claim 3 is characterized in that: described pumping coupler is used for two directional pump.
6. according to claim 1 or 2 or 3 described Erbium-Doped Fiber Amplifier (EDFA)s, it is characterized in that: described optical passive component is the compound use of pumping wave multiplexer and pumping coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02237118 CN2549496Y (en) | 2002-06-06 | 2002-06-06 | Erbium dosed optical fiber amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02237118 CN2549496Y (en) | 2002-06-06 | 2002-06-06 | Erbium dosed optical fiber amplifier |
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| CN 02237118 Expired - Lifetime CN2549496Y (en) | 2002-06-06 | 2002-06-06 | Erbium dosed optical fiber amplifier |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310083C (en) * | 2004-10-21 | 2007-04-11 | 上海交通大学 | Double pump wide band optical fiber parameter amplifier |
| CN1317600C (en) * | 2003-12-30 | 2007-05-23 | 武汉光迅科技股份有限公司 | Gain dsplacement type thulium aduterated optical fiber amplifier using spontaneous radiation light source as auxiliary pumping |
| CN100337155C (en) * | 2004-09-15 | 2007-09-12 | 华为技术有限公司 | Light transmission system and light amplifying method used therein |
| WO2010148591A1 (en) * | 2009-06-23 | 2010-12-29 | 中兴通讯股份有限公司 | Optical fiber amplifier and method for dispersion-compensating and amplifying of signal light |
| CN109451376A (en) * | 2018-11-20 | 2019-03-08 | 武汉光迅科技股份有限公司 | A kind of backward remote gain unit and remote optical pumping amplifier |
| CN110286543A (en) * | 2019-07-30 | 2019-09-27 | 贵州电网有限责任公司信息中心 | Minimize the low-power consumption image intensifer of pumping redundancy backup |
| CN113310565A (en) * | 2021-05-25 | 2021-08-27 | 武汉光迅科技股份有限公司 | Ultra-long distance distributed optical fiber vibration sensing system and method |
| CN113851915A (en) * | 2021-09-24 | 2021-12-28 | 上海拜安实业有限公司 | Optical fiber amplifier device for realizing two-way bidirectional full independence |
| CN114361936A (en) * | 2022-01-04 | 2022-04-15 | 武汉光迅科技股份有限公司 | Mixed Bypass optical structure in EDFA |
-
2002
- 2002-06-06 CN CN 02237118 patent/CN2549496Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317600C (en) * | 2003-12-30 | 2007-05-23 | 武汉光迅科技股份有限公司 | Gain dsplacement type thulium aduterated optical fiber amplifier using spontaneous radiation light source as auxiliary pumping |
| CN100337155C (en) * | 2004-09-15 | 2007-09-12 | 华为技术有限公司 | Light transmission system and light amplifying method used therein |
| CN1310083C (en) * | 2004-10-21 | 2007-04-11 | 上海交通大学 | Double pump wide band optical fiber parameter amplifier |
| WO2010148591A1 (en) * | 2009-06-23 | 2010-12-29 | 中兴通讯股份有限公司 | Optical fiber amplifier and method for dispersion-compensating and amplifying of signal light |
| CN109451376A (en) * | 2018-11-20 | 2019-03-08 | 武汉光迅科技股份有限公司 | A kind of backward remote gain unit and remote optical pumping amplifier |
| CN109451376B (en) * | 2018-11-20 | 2021-12-28 | 武汉光迅科技股份有限公司 | Backward remote gain unit and remote pump amplifier |
| CN110286543A (en) * | 2019-07-30 | 2019-09-27 | 贵州电网有限责任公司信息中心 | Minimize the low-power consumption image intensifer of pumping redundancy backup |
| CN113310565A (en) * | 2021-05-25 | 2021-08-27 | 武汉光迅科技股份有限公司 | Ultra-long distance distributed optical fiber vibration sensing system and method |
| CN113310565B (en) * | 2021-05-25 | 2023-12-01 | 武汉光迅科技股份有限公司 | Ultra-long distance distributed optical fiber vibration sensing system and method |
| CN113851915A (en) * | 2021-09-24 | 2021-12-28 | 上海拜安实业有限公司 | Optical fiber amplifier device for realizing two-way bidirectional full independence |
| CN114361936A (en) * | 2022-01-04 | 2022-04-15 | 武汉光迅科技股份有限公司 | Mixed Bypass optical structure in EDFA |
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Expiration termination date: 20120606 Granted publication date: 20030507 |