CN1338659A - Adaptive intelligent optical fiber amplifier - Google Patents
Adaptive intelligent optical fiber amplifier Download PDFInfo
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- CN1338659A CN1338659A CN 01126962 CN01126962A CN1338659A CN 1338659 A CN1338659 A CN 1338659A CN 01126962 CN01126962 CN 01126962 CN 01126962 A CN01126962 A CN 01126962A CN 1338659 A CN1338659 A CN 1338659A
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Abstract
An adaptive intelligent optical fibre amplifier features that part of light is taken from the input and output of ordinary optical amplifier, and then converted to electric signals which are sent to intelligent controller. According to the relation between prestored performance indexes of amplifier and internal and external parameters and different application conditions, the controller can control the working parameters to make its performance meet external requirements. As a result, an amplifier can be used as pre-amplifier, power amplifier, or circuit amplifier.
Description
Technical field:
The present invention relates to a kind of adaptive intelligent optical fiber amplifier, can satisfy various application demands automatically, solve the adaptive problem of image intensifer, belong to the optical communication technique field.
Background technology:
The superior function that image intensifer owing to have directly amplifies light signal and need occasion of luminous power compensation to obtain more and more widely application as Optical CATV and Fibre Optical Sensor etc. at optical communication field and other.The development of Optical Amplification Technology self is also very fast, and (red tape red band) expands to the whole C wave band to its bandwidth of operation from the arrowband, now begins to develop to length (L) wave band and weak point (S) wave band direction, has developed broadband and ultra-wideband-light amplifier.The amplifier type has also developed polytypes such as PDFA Praseodymium Doped Fiber Amplifier, thulium doped fiber amplifier, semiconductor optical amplifier, Raman fiber amplifier or compound amplifier except Erbium-Doped Fiber Amplifier (EDFA).But no matter be that the problem which kind of amplifier all exists in actual applications is: different system requirements need the amplifier of different characteristics.Such as, require to have high gain and low noise when doing preposition amplification; The rate of doing work then requires enough big power output when amplifying, or the like.From the occasion that image intensifer is used, dense wave division multipurpose (DWDM) system has several, tens even a hundreds of operation wavelength require the wide and flat gain of image intensifer operating wavelength range; The CATV system need carry out that the multichannel luminous power is distributed and guarantee signal transmission quality, requires that the image intensifer output power is big, distortion is little, or the like.Like this, according to different application characteristics, image intensifer has been divided into light preamplifier, optical line amplifier, power amplifier and DWDM image intensifer, CATV image intensifer, digital display circuit image intensifer again, or the like.
The adaptive intelligent technology of image intensifer is to make image intensifer to different application requirements stronger adaptive ability be arranged, can be according to the condition in the external world, parameter as the I/O light signal, or other specified criteria, adjust himself running parameter (as the parameter of gain media or Pu pump parameter etc.), make its duty best or make its duty meet the technology of extraneous needs.
The adaptive optical amplifying technique has begun to come into one's own.Existing image intensifer product, the self-adaptive features that possesses some aspect that has.Many and the comparative maturity of research be to change the pumping parameter of amplifier according to the power of output light signal, thereby regulate the automatic gain control of gain amplifier, as people such as Seo Yeon Park at IEEEPhoton.Tech.Lett., 1998; A kind of output power of flat gain type er-doped image intensifer and the control technology of light amplification gain reported in the article of delivering on the 6:787-789 that is entitled as " Dynamic Gain and Output PowerControl in a Gain-flattened Erbium-doped Fiber Amplifier ".Also the someone has studied the intellectual technology that the light amplifier gain flat characteristic is controlled, as people such as Hyo Sang Kim at IEEE Photon.Tech.Lett., 1998; The article of delivering on the 6:790-792 that is entitled as " Actively Gain-Flattened Erbium-doped Fiber Amplifier Over35nm by Using All-Fiber Acoustooptic Tunable Filters " has been reported with adjustable filter and has been realized the variable optical amplifier technology of flat gain characteristic.
From the data of having delivered, no matter be the image intensifer which kind of has intelligent characteristics, all can not make it have such adaptive ability: same amplifier both can be used as preposition amplification, also can be used as multiple systems such as power amplification or circuit amplification and used.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, design provides a kind of new adaptive intelligent optical fiber amplifier, make same amplifier can intelligently be applied in different occasions, both can be used as preposition amplification, also can be used as power amplification or circuit amplification etc., has adaptive ability widely
For realizing such purpose, adopt normal optical amplifier input terminal and output terminal in the technical scheme of the present invention in non intelligentization, use the way of optically-coupled (beam split) to take out a part of light respectively, these light are converted to the controller of sending into image intensifer behind the electric signal by corresponding photo-detector and handle.The controller of image intensifer has the characteristics of intelligence, it makes differentiation by analyzing the electric signal of sending into from photo-detector to input and output light signal, again with every performance index (as light amplification gain, noise figure, light amplification gain, saturation output power, bandwidth of operation, flat gain etc.) of discrimination result and the image intensifer of storage in advance and the various parameters in its inside and outside (as the character and the parameter of gain media; The wavelength of pumping laser, form and power; The type of I/O light signal, size and wavelength coverage etc.) relation compare analysis, intelligently determine and adjust its running parameter (as parameter, Pu pump parameter or the filtering parameter etc. of gain media), make the image intensifer duty meet extraneous needs.
Such as, when amplifier is applied to actual optical network system, the scope difference of different its power inputs of application purpose.When using as rate of doing work amplifier, power input is often bigger, greatly about between-the 10dBm-+6dBm; When making prime amplifier and using, amplification be small-signal, power input is often very little, greatly about between-the 30--20dBm; When making circuit and amplifying, power input is between between the two above-mentioned, greatly about the scope of-20--10dBm.Like this, we can be with input optical power as an adaptive foundation.If input optical power very little (such as-20dBm or lower) meets the feature of the preposition amplification of small-signal, then intelligent focusing on of handling gained and the optimization of noise figure; If input optical power big (such as-10dBm or higher) meets the feature of large-signal power amplification, the then intelligent optimization of handling that focuses on Output optical power and gain; If the feature that the input optical signal coincidence circuit amplifies, then intelligent controller is to each the index property taken into account processing.The Changing Pattern of the amplifier performance state when we can be in advance with different input power under the different operating parameter and relevant optimum value record also store, determine adaptive requirement according to the size of real input signal power when being applied to system, determine the work parameter of amplifier then according to the relation data of storage, thereby realize that same amplifier both can be used as preposition amplification, also can be used as the purpose that power amplification or circuit amplify.
The normal optical amplifier of said non intelligentization of the present invention comprises various types of Erbium-Doped Fiber Amplifier (EDFA)s, PDFA Praseodymium Doped Fiber Amplifier, thulium doped fiber amplifier, semiconductor optical amplifier, Raman fiber amplifier or compound amplifier etc.The formation of normal optical amplifier can be that single-stage is amplified, and also can be two-stage or multistage amplification.The pump mode of normal optical amplifier can be optical pumping in the same way, also can be the light/electric pump Pu of backlight pumping, forward and reverse double pumping action or other type.
Compare with prior art, the present invention has many-sided superiority.Utilized technology of the present invention, common image intensifer has promptly had intelligent characteristics, become intelligentized broadband and ultra-wideband-light amplifier as broadband and ultra-wideband-light amplifier, Erbium-Doped Fiber Amplifier (EDFA), PDFA Praseodymium Doped Fiber Amplifier, thulium doped fiber amplifier, semiconductor optical amplifier, Raman fiber amplifier or compound amplifier just become intelligentized Erbium-Doped Fiber Amplifier (EDFA), PDFA Praseodymium Doped Fiber Amplifier, thulium doped fiber amplifier, semiconductor optical amplifier, Raman fiber amplifier or compound amplifier or the like respectively.Utilized the image intensifer of technology of the present invention, not only had automatic gain control function, and the more important thing is it also with the input signal of image intensifer as it control important in foundation, make image intensifer that applicable performance widely arranged.Same adaptive intelligent image intensifer promptly can satisfy the multiple application need that preposition amplification, power amplification or circuit amplify, and makes the application of image intensifer more flexible.Because the image intensifer kind that needs has reduced, and has improved efficient aspect production, has reduced cost.
Description of drawings and embodiment:
For understanding technical scheme of the present invention better, be further described below in conjunction with drawings and Examples.
Fig. 1 is a theory diagram of the present invention.As shown in the figure, adaptive intelligent optical fiber amplifier of the present invention comprises input optically-coupled (beam split) device (1), normal optical amplifier (2), output optical coupler (3), two photo-detectors (4,6) and computer intelligence controller (5).The input end of normal optical amplifier (2) is connected input photo-coupler (1) and output optical coupler (3) respectively with output terminal, input photo-coupler (1) and output optical coupler (3) also are connected to intelligent controller (5) through photo-detector (4), photo-detector (6) respectively, and base amplifier (2) is connected with intelligent controller (5).
Light signal at first enters input photo-coupler (1), enters the image intensifer (2) of common non intelligentization again, exports by output optical coupler (3) after amplifying.Input photo-coupler (1) is told a part of input light and is entered photo-detector (4), sends into intelligent controller (5) after being converted into electric signal.Output optical coupler (3) is told a part of output light and is entered photo-detector (6), sends into intelligent controller (5) after being converted into electric signal.Between intelligent controller (5) and the base amplifier (2) is the electrical communication of pilot signal.Intelligent controller is by analyzing the electric signal of sending into from photo-detector (4,6), differentiation is made in input and output light signal, and discrimination result and the relation that is stored in the various parameters of every performance index and inside and outside of the image intensifer in the light intelligent controller (5) in advance compared analysis, determine and adjust its running parameter, make the image intensifer duty meet extraneous needs.
Fig. 2 is the theory diagram of one embodiment of the invention.
The embodiment of Fig. 2 is a kind of adaptive intelligent Erbium-Doped Fiber Amplifier (EDFA) (EDFA).As shown in the figure, amplifier is that the boundary is divided into the first order and the second level with two dotted lines, light signal at first enters input photo-coupler (1), pass through the Er-doped fiber (9) that enters the first order behind optoisolator (7), the wavelength division multiplexer (8) again, again through the output optical coupler (11) and the inter-stage optical filter (12) of optoisolator (10), the first order, enter partial Er-doped fiber (14) after entering partial wavelength division multiplexer (13), behind wavelength division multiplexer (15) and output optoisolator (16), export again by output optical coupler (3).Input photo-coupler (1) is told part input light and is entered photo-detector (4), send into intelligent controller (5) after being converted into electric signal, the output light that photo-coupler (11) is told a part of first order enters photo-detector (19), be converted into the intelligent controller (5) of sending into image intensifer behind the electric signal, output optical coupler (3) is told part output light and is entered photo-detector (6), send into intelligent controller (5) after being converted into electric signal, intelligent controller (5) and inter-stage optical filter (12), tunable optical shunt (1) and two pump lasers (18,20) between the electrical communication of pilot signal.
Adaptive intelligent Erbium-Doped Fiber Amplifier (EDFA) (EDFA) is that the boundary is divided into two-stage with two dotted lines, and the first order is mainly used to optimize noiseproof feature, and the second level is mainly used to optimize the light amplification gain.According to the relevant demonstration of noise problem, during multistage amplification, if first order amplifier has enough gains (being not less than 10dB), then noise figure is mainly determined by first order amplifier.So as long as the noise figure that the first order is amplified is low, then the noise figure of whole amplifier just can be lower.Laying particular stress on of second level design a little is to promote as far as possible output power.
Every performance index and the relation of its various parameters in inside and outside and different the laying particular stress on of this two-stage amplification according to the EDFA that obtains in advance can design the parameter of each building block and work out the adaptive control program.Intelligent controller (5) can determine to import, export the duty of the total amplifiers such as gain of the parameter of light signal and gain, second level gain and amplifier that the first order is amplified by fiber coupler (1,11,3) and corresponding photo-detector (4,19,6).When light signal is imported, intelligent controller (5) is with the relation data according to relevant noise figure, gain and the pump light of prior storage, input light etc., in conjunction with Several Factors such as noise figure and light amplification gains, guaranteeing to have under the prerequisite of enough big gains, factors such as size according to input signal power, the size of decision first order pump power by control pump laser (18) and tunable optical shunt (17), all is optimal value thereby make the noise figure of the first order to input arbitrarily.
The mode of typical positive and negative both direction pumping has simultaneously been adopted in the second level, is mainly used to further promote the luminous power that the first order sends, and realizes gain optimization.Pump laser (20) provides forward pumping, tunable optical shunt (17) except the needs of telling a part of light and satisfying the first order, the backward pumping that the remaining luminous power of pump laser (18) is amplified as the second level by wavelength division multiplexer (15).According to the relevant demonstration of two directional pump technology, backward pumping is very effective to improving gain.And as long as forward pumping is not too low, the increase of backward pumping influences the noise figure of amplifier hardly.Like this, the effect of pump laser can be given full play to, under the situation that does not change pumping configuration and pumping parameter, bigger gain can be obtained.In a word, can realize gain-adjusted, thereby make amplifier reach gain maximum or that need by control to second pump laser (20) and tunable optical shunt (17).
In addition, inter-stage optical filter (12) is designed to adjustable filter, like this by the adjusting of intelligent controller, can realize the automatic control to Erbium-Doped Fiber Amplifier (EDFA) pass-band performance (gain-wavelength, noise figure-wavelength etc.).Intelligent controller (5) is implemented intelligentized comprehensively monitoring to each grade amplification index of EDFA, the running parameter of each Primary Component and every achievement data of whole amplifier, automatically regulate according to the instruction of external condition or ambient systems, keep EDFA always to be in optimum Working, or be always operating at the state that meets the external system requirement.The adaptive intelligent EDFA of this structure, the main performance index that can reach is: small-signal gain:＞35dB, noise figure:＜4.1dB, saturation output power reaches 21dBm during the large-signal input.The input of the signal of this self-adaptation EDFA can be from-40dBm up to+10dBm, and the 50dB dynamic range of promptly having an appointment can either be used for small-signal and amplify, and can be used in power amplification again, and various application occasions can both adapt to automatically, and does not need extra adjustment.
Claims (4)
1, a kind of adaptive intelligent optical fiber amplifier, it is characterized in that being connected input photo-coupler (1) and output optical coupler (3) respectively with output terminal at the input end of normal optical amplifier (2), take out a part of light respectively by input photo-coupler (1), output optical coupler (3), after photo-detector (4,6) is converted into electric signal, send into intelligent controller (5) and handle, normal optical amplifier (2) and store in advance between the intelligent controller (5) of the various parameters of every performance index and inside and outside of image intensifer the pilot signal electrical communication is arranged.
2,, it is characterized in that normal optical amplifier (2) comprises Erbium-Doped Fiber Amplifier (EDFA), PDFA Praseodymium Doped Fiber Amplifier, thulium doped fiber amplifier, semiconductor optical amplifier, Raman fiber amplifier or compound amplifier etc. as the said adaptive intelligent optical fiber amplifier of claim 1.
3, as the said adaptive intelligent optical fiber amplifier of claim 1, it is characterized in that being divided into secondary or multistage at normal optical amplifier (2), optical filter between adjustable stage (12) links to each other with intelligent controller (5).
4, as the said adaptive intelligent optical fiber amplifier of claim 3, the mode of positive and negative both direction pumping is simultaneously adopted in the second level that it is characterized in that normal optical amplifier (2), pump laser (18,20) links to each other with intelligent controller (5), pump laser (20) provides forward pumping, tunable optical shunt (17) except the needs of telling a part of light and satisfying the first order, the backward pumping that the remaining luminous power of pump laser (18) is amplified as the second level by wavelength division multiplexer (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011269626A CN1141616C (en) | 2001-10-08 | 2001-10-08 | Adaptive intelligent optical fiber amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011269626A CN1141616C (en) | 2001-10-08 | 2001-10-08 | Adaptive intelligent optical fiber amplifier |
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| CN1338659A true CN1338659A (en) | 2002-03-06 |
| CN1141616C CN1141616C (en) | 2004-03-10 |
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| CNB011269626A Expired - Fee Related CN1141616C (en) | 2001-10-08 | 2001-10-08 | Adaptive intelligent optical fiber amplifier |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327286C (en) * | 2005-09-30 | 2007-07-18 | 电子科技大学 | Multifunctional optical amplifier |
| CN104270258A (en) * | 2014-09-11 | 2015-01-07 | 武汉光迅科技股份有限公司 | System for monitoring high-speed Ethernet services |
| CN105807534A (en) * | 2016-04-27 | 2016-07-27 | 无锡市德科立光电子技术有限公司 | Working mode selectable intelligent semiconductor fiber optic amplifier |
| CN106205109A (en) * | 2016-06-24 | 2016-12-07 | 桂林创研科技有限公司 | A kind of for monitoring fibre system at a high speed |
| CN108051923A (en) * | 2017-12-30 | 2018-05-18 | 武汉理工光科股份有限公司 | For the optical fiber multiple wavelength light-pulse generator of distributed Raman temp measuring system |
| CN108873559A (en) * | 2018-09-21 | 2018-11-23 | 宏力光电科技（深圳）有限公司 | A kind of fiber amplifier |
| CN112996437A (en) * | 2018-11-20 | 2021-06-18 | 深圳市大耳马科技有限公司 | Self-adaptive adjustment and regulation method, device and system for optical fiber sensor |
-
2001
- 2001-10-08 CN CNB011269626A patent/CN1141616C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327286C (en) * | 2005-09-30 | 2007-07-18 | 电子科技大学 | Multifunctional optical amplifier |
| CN104270258A (en) * | 2014-09-11 | 2015-01-07 | 武汉光迅科技股份有限公司 | System for monitoring high-speed Ethernet services |
| CN105807534A (en) * | 2016-04-27 | 2016-07-27 | 无锡市德科立光电子技术有限公司 | Working mode selectable intelligent semiconductor fiber optic amplifier |
| CN106205109A (en) * | 2016-06-24 | 2016-12-07 | 桂林创研科技有限公司 | A kind of for monitoring fibre system at a high speed |
| CN108051923A (en) * | 2017-12-30 | 2018-05-18 | 武汉理工光科股份有限公司 | For the optical fiber multiple wavelength light-pulse generator of distributed Raman temp measuring system |
| CN108873559A (en) * | 2018-09-21 | 2018-11-23 | 宏力光电科技（深圳）有限公司 | A kind of fiber amplifier |
| CN108873559B (en) * | 2018-09-21 | 2023-12-01 | 宏力光电科技（深圳）有限公司 | Optical fiber amplifier |
| CN112996437A (en) * | 2018-11-20 | 2021-06-18 | 深圳市大耳马科技有限公司 | Self-adaptive adjustment and regulation method, device and system for optical fiber sensor |
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| Publication number | Publication date |
|---|---|
| CN1141616C (en) | 2004-03-10 |
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