CN203434984U - Low-power fiber amplification circuit structure - Google Patents
Low-power fiber amplification circuit structure Download PDFInfo
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- CN203434984U CN203434984U CN201320425869.1U CN201320425869U CN203434984U CN 203434984 U CN203434984 U CN 203434984U CN 201320425869 U CN201320425869 U CN 201320425869U CN 203434984 U CN203434984 U CN 203434984U
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- fiber amplifier
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- circuit structure
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- power consumption
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Abstract
The utility model relates to a low-power fiber amplification circuit structure. The low-power fiber amplification circuit structure comprises a fiber amplifier, an active drive circuit and a drive control circuit, wherein the input end of the fiber amplifier is connected with the output end of a light source; the active drive circuit is connected with the fiber amplifier; the drive control circuit is connected between the light source and the active drive circuit; and the fiber amplifier is a semiconductor fiber amplifier or a rare earth-doped fiber amplifier. By adopting such a structure, the low-power fiber amplification circuit structure has the following advantages: the active drive circuit in the fiber amplification circuit structure can perform driving based on needs according to whether input light signals reach or not, the amplification circuit power consumption is reduced, the power consumption is theoretically the duty ratio proportion of DC control, the light signal-to-noise ratio after amplification is enhanced, the amplification circuit transmission noise is reduced, the heat productivity is reduced, the service life of circuit components is prolonged, the structure is simple, and the use is convenient, therefore, the low-power fiber amplification circuit structure has a wider application scope.
Description
Technical field
The utility model relates to Optical Fiber Transmission field, relates in particular to fiber amplifier field, specifically refers to a kind of low-power consumption fiber amplifier circuit structure.
Background technology
At present conventional for communicating by letter or the fiber amplifier of sensing generally has two kinds: optical semiconductor fiber amplifier (SOA), the fiber amplifier of doped with rare-earth elements (REDFA).
Optical semiconductor fiber amplifier principle approaches semiconductor laser, the transition of inter-stage of using atomic energy is excited phenomenon and is carried out light amplification, by the direct drive amplification medium of electric current, make it energy level upwards transition occurs, when having flashlight input, the downward transition of disturbance energy level, sends and the light of inputting the same frequency of light, wavelength, polarization, forms the output light amplified.
Rare-earth doped optical fibre amplifier, utilize doped with rare-earth elements in optical fiber, such as the maximum er element of application, utilize a pumping of current drives (Pump) light to encourage doped chemical, make it to occur upwards energy level transition, when having flashlight input, the downward transition of disturbance energy level, send and the light of inputting the same frequency of light, wavelength, polarization, form the output light amplified.
Although these two kinds of fiber amplifier principles are different, can be interpreted as that current drives driving source amplifies light signal.These two kinds of amplifiers of application are to be all operated in DC state at present, whether there is signal input all in normal current driving condition, be the active driving circuit view of fiber amplifier in prior art as shown in fig. 1, therefore such application has following problem:
Power consumption is higher: because amplification medium is always in current drives state, can produce higher power consumption, especially for signal dutyfactor application on the low side, and need the place of low-power consumption work, as seabed, solar powered amplifier, hand-held battery supply set have the local of requirement and are not suitable for power consumption.
Noise is large: signal transmission is digital signal especially, maximum duty ratio is communication system, approximately namely 50%, and for some other application, such as optical time domain reflectometer (OTDR) equipment, distributed temperature measuring system (DTS), usually signal dutyfactor is very low, such as the conventional pulsewidth 10ns of DTS, cycle 10ms signal, the particle reversion that driving source produces when there is no signal will spontaneous transition be returned lower state, produce spontaneous radiation, between two signals, form noise, this is spontaneous emission noise.
Life-span is not high: owing to amplifying active medium always in current excitation state, luminescence chip can be aging and end-of-life, for high reliability application, and as seabed, desert etc., life of product is extremely important.
Heating is large: for continuous current, drive, its power consumption is constant, removes outside electro-optical efficiency, all becomes heat energy, makes product heating serious.Conventionally also need Thermal Electric Cooler (TEC) to carry out temperature control, to guarantee the working temperature of product.
Utility model content
The purpose of this utility model is the shortcoming that has overcome above-mentioned prior art, provides a kind of and can realize active driving circuit in fiber amplifier circuit structure and whether drive as required, reduce amplifying circuit power consumption, reduce amplifying circuit transmitted noise, have the low-power consumption fiber amplifier circuit structure of broader applications scope according to the arrival of input optical signal.
To achieve these goals, low-power consumption fiber amplifier circuit structure of the present utility model has following formation:
This low-power consumption fiber amplifier circuit structure, its main feature is, described fiber amplifier circuit structure comprises fiber amplifier, active driving circuit and Drive and Control Circuit, the input of described fiber amplifier is connected with the output of light source, described active driving circuit is connected with described fiber amplifier, and described Drive and Control Circuit is connected between described light source and active driving circuit.
Preferably, described Drive and Control Circuit comprises driving governor, and the input of described driving governor is connected with the synchronizable optical signal output part of described light source, and described driving governor is connected with described active driving circuit.
More preferably, described low-power consumption fiber amplifier circuit structure also comprises fiber delay line, between the light source described in this fiber delay line is connected in and described fiber amplifier.
Preferably, described Drive and Control Circuit comprises fiber coupler, photoelectric detector and driving governor, the input of described fiber coupler is connected with the output of described light source, the output of described fiber coupler is connected with the input of the input of described fiber amplifier, described photoelectric detector respectively, and described driving governor is connected between described photoelectric detector and active driving circuit.
More preferably, described low-power consumption fiber amplifier circuit structure also comprises fiber delay line, between the fiber coupler described in this fiber delay line is connected in and described fiber amplifier.
Preferably, described fiber amplifier is optical semiconductor fiber amplifier.
More preferably, described active driving circuit is drive current circuit.
Preferably, described fiber amplifier is rare earth doped fiber amplifier.
More preferably, described active driving circuit is pump laser.
Adopt the low-power consumption fiber amplifier circuit structure in this utility model, there is following beneficial effect:
(1) reduced the power consumption of fiber amplifier circuit structure, power consumption is the duty ratio ratio of DC control in theory, and such as signal dutyfactor is 1%, power consumption drops to 1% with respect to current direct current supply.
(2) improve to amplify after Optical Signal To Noise Ratio, for low duty ratio signal, amplify, due in " sky " signal-less time section, active device is not opened, and reduces spontaneous emission noise (ASE) during this period of time, makes to amplify rear signal to noise ratio and improves, and reduces signal transmitted noise.
(3) reduce caloric value, due to power-dissipation-reduced, caloric value also reduces, and the caloric value reducing is in theory directly proportional to duty ratio.Because heating reduces, the active device opening time also shortens greatly, and will be multiplied device lifetime, not need to be equipped with in addition heat dissipation element, simplify circuit structure.
Accompanying drawing explanation
Fig. 1 is the circuit state schematic diagram as optical signal transmission of fiber amplifier of the prior art.
Fig. 2 is the structural representation of the low-power consumption fiber amplifier circuit structure of the first embodiment of the present utility model.
Fig. 3 is the structural representation of the low-power consumption fiber amplifier circuit structure of the second embodiment of the present utility model.
Fig. 4 is the circuit state schematic diagram of low-power consumption fiber amplifier circuit structure of the present utility model when inputting without light signal.
Fig. 5 is the circuit state schematic diagram of low-power consumption fiber amplifier circuit structure of the present utility model when input optical signal arrives.
Fig. 6 is the circuit state schematic diagram of low-power consumption fiber amplifier circuit structure of the present utility model when input optical signal leaves.
Embodiment
In order more clearly to describe technology contents of the present utility model, below in conjunction with specific embodiment, conduct further description.
In order to solve the existing problem of fiber amplifier of the prior art, the purpose of this utility model is whether the active medium of fiber amplifier is arrived and carry out " as required " pulsed drive according to signal, realizes the low-power consumption of amplifier according to the cycle high-speed switch active driving circuit of signal.
The basic principle of this utility model is: input digital optical signal is detected or synchronously, when no signal arrives, close the driving of active driving circuit, to solve, the existing ubiquitous power consumption of fiber amplifier is high, noise is large, the life-span is not high enough, the problem such as large of generating heat.In other words, allow active driving circuit in switch or pulse condition.According to basic principle of the present utility model, the state of the active driving circuit of realizing is as shown in Fig. 4, Fig. 5, Fig. 6.
Be illustrated in figure 4 the circuit state schematic diagram of described low-power consumption fiber amplifier circuit structure when inputting without light signal.
Be illustrated in figure 5 the circuit state schematic diagram of described low-power consumption fiber amplifier circuit structure when input optical signal arrives.
Be illustrated in figure 6 the circuit state schematic diagram of described low-power consumption fiber amplifier circuit structure when input optical signal leaves.
This amplifier is especially obvious for low-repetition-frequency pulsed optical signals amplification effect, and duty ratio is less, and effect is better.
Conventionally the scheme adopting has but is not limited to following two kinds of embodiment:
Be illustrated in figure 2 the structural representation of the low-power consumption fiber amplifier circuit structure of the first embodiment of the present utility model.
1, in the first embodiment, light source sends light signal and transfers in fiber amplifier after delayed, while sending signal by light source, provide synchronizing signal to Drive and Control Circuit simultaneously, drive control circuit active driving circuit, active driving circuit drives described fiber amplifier, Drive and Control Circuit is drive current control circuit, by synchronizing signal, controlled the driving switch of active driving circuit, and arrive with signal this switching time, synchronize, or than the arrival of signal, have the lead of set time.Delay line is for regulating synchronizeing of control signal and light signal, nonessential interpolation.
Be illustrated in figure 3 the structural representation of the low-power consumption fiber amplifier circuit structure of the second embodiment of the present utility model.
2, in the second embodiment, light source sends light signal, through fiber coupler along separate routes, after one tunnel is delayed, transfer in fiber amplifier, photoelectric detector of another route carries out pulse detection, when input optical signal arrival being detected, by Drive and Control Circuit, is drive current control circuit, open active driving circuit, when signal leaves, close active driving circuit.Delay line is for regulating synchronizeing of control signal and light signal, nonessential interpolation.
Active driving circuit in the utility model is opened can be before signal arrives or after arriving, start-up time to and the signal ts constantly that arrives, can be relevant also can onrelevant.
Described active driving circuit is closed can be before signal leaves or after leaving, close moment tc and the signal ts constantly that arrives, can be relevant also can onrelevant.
Fiber amplifier can be to mix rare earth (erbium, ytterbium, spectrum or other rare earth element) fiber amplifier, can be also semiconductor optical amplifier.
When described fiber amplifier is optical semiconductor fiber amplifier, described active driving circuit is drive current circuit.
When described fiber amplifier is rare earth doped fiber amplifier, described active driving circuit is pump laser.
The switching frequency of active driving circuit and opening/closing time ratio can be any.
It is that in DTS system, to carry out the detailed process of amplification transmission of low-power consumption low noise high-peak power light-pulse generator as follows that low-power consumption fiber amplifier circuit structure of the present utility model is applied to data transmission system:
The basic structure of DTS system is by a light-pulse generator, to add an erbium-doped fiber amplifier EYDFA to form.The generation of pulse signal is produced by a slice FPGA field programmable gate array, and giving Distributed Feedback Laser is distributed feedback laser, and by the Distributed Feedback Laser of 1550nm, being modulated into output peak power is the light signal of 10mW, pulsewidth 10ns, repetition 1kHz.FPGA produces a 10us synchronizing signal and gives pump laser driving simultaneously, and the pump laser opening time is 10us.At input optical signal, arrive front 5～8us and open pump laser, after signal leaves, 2～5us closes pump laser in the time, can obtain exporting light signal after the amplification of peak power 15W, pulsewidth 10ns, repetition 1kHz, signal to noise ratio >35dB signal.Its amplifier section power consumption and heating are only equivalent to 1% of Continuous Drive, and signal to noise ratio is compared and optimized 5dB with Continuous Drive in prior art.
Adopt the low-power consumption fiber amplifier circuit structure in this utility model, there is following beneficial effect:
(1) reduced the power consumption of fiber amplifier circuit structure, power consumption is the duty ratio ratio of DC control in theory, and such as signal dutyfactor is 1%, power consumption drops to 1% with respect to current direct current supply.
(2) improve to amplify after Optical Signal To Noise Ratio, for low duty ratio signal, amplify, due in " sky " signal-less time section, active device is not opened, and reduces spontaneous emission noise (ASE) during this period of time, makes to amplify rear signal to noise ratio and improves, and reduces signal transmitted noise.
(3) reduce caloric value, due to power-dissipation-reduced, caloric value also reduces, and the caloric value reducing is in theory directly proportional to duty ratio.Because heating reduces, the active device opening time also shortens greatly, and will be multiplied device lifetime, not need to be equipped with in addition heat dissipation element, simplify circuit structure.
In this specification, the utility model is described with reference to its specific embodiment.But, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (9)
1. a low-power consumption fiber amplifier circuit structure, it is characterized in that, described fiber amplifier circuit structure comprises fiber amplifier, active driving circuit and Drive and Control Circuit, the input of described fiber amplifier is connected with the output of light source, described active driving circuit is connected with described fiber amplifier, and described Drive and Control Circuit is connected between described light source and active driving circuit.
2. low-power consumption fiber amplifier circuit structure according to claim 1, it is characterized in that, described Drive and Control Circuit comprises driving governor, the input of described driving governor is connected with the synchronizable optical signal output part of described light source, and described driving governor is connected with described active driving circuit.
3. low-power consumption fiber amplifier circuit structure according to claim 2, is characterized in that, described fiber amplifier circuit structure also comprises fiber delay line, between the light source described in this fiber delay line is connected in and described fiber amplifier.
4. low-power consumption fiber amplifier circuit structure according to claim 1, it is characterized in that, described Drive and Control Circuit comprises fiber coupler, photoelectric detector and driving governor, the input of described fiber coupler is connected with the output of described light source, the output of described fiber coupler is connected with the input of the input of described fiber amplifier, described photoelectric detector respectively, and described driving governor is connected between described photoelectric detector and active driving circuit.
5. low-power consumption fiber amplifier circuit structure according to claim 4, is characterized in that, described fiber amplifier circuit structure also comprises fiber delay line, between the fiber coupler described in this fiber delay line is connected in and described fiber amplifier.
6. low-power consumption fiber amplifier circuit structure according to claim 1, is characterized in that, described fiber amplifier is optical semiconductor fiber amplifier.
7. low-power consumption fiber amplifier circuit structure according to claim 6, is characterized in that, described active driving circuit is drive current circuit.
8. low-power consumption fiber amplifier circuit structure according to claim 1, is characterized in that, described fiber amplifier is rare earth doped fiber amplifier.
9. low-power consumption fiber amplifier circuit structure according to claim 8, is characterized in that, described active driving circuit is pump laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320425869.1U CN203434984U (en) | 2013-07-17 | 2013-07-17 | Low-power fiber amplification circuit structure |
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| CN201320425869.1U CN203434984U (en) | 2013-07-17 | 2013-07-17 | Low-power fiber amplification circuit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319605A (en) * | 2014-11-17 | 2015-01-28 | 北方工业大学 | Ultra-short optical pulse shaping device tunable in piezoelectricity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319605A (en) * | 2014-11-17 | 2015-01-28 | 北方工业大学 | Ultra-short optical pulse shaping device tunable in piezoelectricity |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20210717 |