CN108444606A - Pulse signal reproducer based on optical fiber - Google Patents
Pulse signal reproducer based on optical fiber Download PDFInfo
- Publication number
- CN108444606A CN108444606A CN201810284498.7A CN201810284498A CN108444606A CN 108444606 A CN108444606 A CN 108444606A CN 201810284498 A CN201810284498 A CN 201810284498A CN 108444606 A CN108444606 A CN 108444606A
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- China
- Prior art keywords
- section
- signal
- optical fiber
- pulse signal
- coupling section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 31
- 230000008878 coupling Effects 0.000 claims abstract description 37
- 238000010168 coupling process Methods 0.000 claims abstract description 37
- 238000005859 coupling reaction Methods 0.000 claims abstract description 37
- 230000010076 replication Effects 0.000 claims abstract description 30
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 210000001367 artery Anatomy 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 230000009022 nonlinear effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
-
- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
Abstract
The invention discloses a kind of pulse signal reproducer based on optical fiber, including single mode optical fiber, the single mode optical fiber includes input coupling section and output coupling section, there is the alternately signal replication section of connection and connection coupled section between input coupling section and output coupling section, the rear end of input coupling section is coupled with the front end of first signal replication section, and the front end of the output coupling section is coupled with the rear end of the last one signal replication section；The signal replication section includes mutually independent transport part and delay portion, and in n-th signal replication section, the length of delay portion is longer than the length of transport part by 2N‑1vt0.Using the above structure, single light pulse signal can be proceeded through to duplication and become the identical multiple light pulse signals of optical characteristics, to reduce the noise introduced in transmission and recording process, improve the signal-to-noise ratio and dynamic range of measured signal, and, when light signal energy is larger, the influence of nonlinear effect can be effectively reduced.
Description
Technical field
The invention belongs to the optical diagnostics studying technological domains of high dynamic range, and in particular to a kind of pulse based on optical fiber
Signal replication device.
Background technology
For certain equipment, the accurate pulse shape that measures is vital, such as, in inertial confinement fusion
(ICF) study in, in order to make pellet obtain the possible compression of higher, laser aid need generate high stable, high contrast swash
Waveform.Contrast, which can be measured, using nonlinear technology reaches 108Impulse waveform, and measure the pulse of nanosecond order in real time
Light can only then pass through detector and oscillograph.
Although the sample rate of oscillograph is being continuously improved, it is constrained to digital quantizer, vertical resolution is protected always
It holds in 8bit.Therefore, oscillograph is the key factor for limiting measured signal dynamic range, cannot meet inertial confinement fusion and grind
Study carefully the pulse shape accurate measurement that middle high contrast requires.For periodic signal, the conventional method for reducing noise was believed the period
It number is averaged, signal-to-noise ratio can thus be made to become M times original of radical sign, wherein M is the number of periodic signal.But it is this
Boosting method can not be applied to aperiodic single signal, and solving problem above becomes the task of top priority.
Invention content
In order to solve the above technical problems, the present invention provides a kind of pulse signal reproducer based on optical fiber, can be by single
Light pulse signal is replicated, and is then averaged again to the signal of duplication, and then is reduced and drawn in transmission and recording process
The noise entered, to achieve the purpose that improve signal-to-noise ratio.
To achieve the above object, technical solution of the present invention is as follows：
A kind of pulse signal reproducer based on optical fiber, is characterized by：Including single mode optical fiber, which includes point
Not Wei Yu both ends input coupling section and output coupling section, between the input coupling section and output coupling section have alternately connect
Signal replication section and connection coupled section, the rear end of the input coupling section couples with the front end of first signal replication section, institute
The front end for stating output coupling section is coupled with the rear end of the last one signal replication section；The signal replication section includes mutually independent
Transport part and delay portion, the rear end and delay of the front end of any connection coupled section and the transport part of a upper signal replication section
The rear end in portion couples simultaneously, and rear end and the next signal of same connection coupled section replicate front end and the delay portion of the transport part of section
Front end couple simultaneously, in n-th signal replication section, the length of delay portion is longer than the length of transport part by 2N-1vt0；Wherein, N is
Positive integer, v are transmission speed of the light pulse signal in single mode optical fiber, t0For the nearby optical pulses signal after duplication interval when
Between.
Using the above structure, the light pulse signal of input can be divided into two by input coupling section and introduces first respectively
In the transport part and delay portion of a signal replication section, and connect coupled section can receive a signal replication section transport part and
The light pulse signal that delay portion transmission comes, and light pulse signal is divided into two and introduces the biography that next signal replicates section respectively again
In defeated portion and delay portion；Also, since in n-th signal replication section, the length of delay portion is longer than the length of transport part by 2N-1vt0,
Therefore, each light pulse signal equidistantly distributed finally exported from output coupling section, realization carry out single light pulse signal
Become the identical light pulse signal of multiple optical characteristics by duplication, so as to be averaged to these light pulse signals, reduces
The noise introduced in transmission and recording process, makes signal-to-noise ratio become handling M times of the radical sign of single light pulse signal, wherein M
Sum for the light pulse signal obtained after duplication, to improve the signal-to-noise ratio and dynamic range of measured signal；Moreover, in light
When pulse signal energy is larger, the influence of nonlinear effect can be reduced using the present invention.
As preferred：There is the input coupling section at least one signal to input sub-optical fibre.Using the above structure, Neng Gouyi
It is secondary to measure multiple arrival times different aperiodic single light pulse signal.
As preferred：The connection coupled section includes melt zone and the conical section positioned at the melt zone both ends, each taper
The diameter of section gradually increases outward from melt zone.Using the above structure, the connection coupled section of melting cone type can by multifiber
It is coupled by ground, fusion degree is high.
As preferred：The outside of the single mode optical fiber is provided with protection box, the front end of the input coupling section and output
The rear end of coupled section is pierced by protection box.Using the above structure, to prevent interference signal from entering single mode optical fiber, it is ensured that light pulse
The consistency of signal replication.
As preferred：The interval time t of the nearby optical pulses signal0More than the pulse width of light pulse signal.Using
Above method makes nearby optical pulses signal not be superimposed, is easy to post-processing.
Compared with prior art, the beneficial effects of the invention are as follows：
Using the pulse signal reproducer provided by the invention based on optical fiber, structure novel, it is easy to accomplish, it can will be single
Light pulse signal proceeds through duplication and becomes the identical multiple light pulse signals of optical characteristics, is transmitting and is recording to reduce
The noise introduced in the process improves the signal-to-noise ratio and dynamic range of measured signal, also, when light signal energy is larger, energy
Enough effectively reduce the influence of nonlinear effect.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of the present invention；
Fig. 2 is the external structure schematic diagram of the present invention；
Fig. 3 is the structural schematic diagram for connecting coupled section.
Specific implementation mode
The invention will be further described with attached drawing with reference to embodiments.
It refers to Fig. 1 and Fig. 2, a kind of pulse signal reproducer based on optical fiber, including protection box 2 and is encapsulated in protection
The front-end and back-end of single mode optical fiber 1 in box 2, the single mode optical fiber 1 are pierced by protection box 2.
Fig. 1 is referred to, the single mode optical fiber 1 includes the input coupling section 11 and output coupling section for being located at its both ends
14, there is the alternately signal replication section 12 of connection and connection coupled section between the input coupling section 11 and output coupling section 14
13, the rear end of the input coupling section 11 is coupled with the front end of first signal replication section 12, before the output coupling section 14
End is coupled with the rear end of n-th signal replication section 12, the front end of any one connection coupled section 13 and a upper signal replication section 12
Rear end coupling, the front end of rear end and next signal the duplication section 12 of same connection coupled section 13 couples.Light pulse signal is every
It is replicated with being just divided into two by a signal replication section 12, and optical characteristics will not be changed, therefore, finally from output
Coupled section 14 exports the identical light pulse signal of M optical characteristics, wherein M is positive integer.
Fig. 1 is referred to, there is the input coupling section 11 at least one signal to input sub-optical fibre 111, being capable of one-shot measurement
Different aperiodic single light pulse signal of multiple arrival times.
Fig. 1 is referred to, the signal replication section 12 includes mutually independent transport part 121 and delay portion 122, any described
The rear end of the rear end and delay portion 122 that connect the front end of coupled section 13 and the transport part 121 of a upper signal replication section 12 is simultaneously
Coupling, the front end and delay portion 122 of the rear end of same connection coupled section 13 and the transport part 121 of next signal duplication section 12
Front end couples simultaneously.
It should be pointed out that in n-th signal replication section 12, the length of delay portion 122 is longer than the length of transport part 121 by 2N -1vt0, wherein N is the positive integer less than or equal to M, and v is transmission speed of the light pulse signal in single mode optical fiber 1, t0To replicate
The interval time of nearby optical pulses signal afterwards, also, the interval time t of the nearby optical pulses signal0Believe more than light pulse
Number pulse width.Such design makes each light pulse signal equidistantly distributed, and adjacent light pulse signal will not be superimposed.
Further, the length of each transport part 121 is identical, to not only reduce design difficulty, but also improves light pulse
The duplicating efficiency of signal.
Fig. 3 is referred to, the connection coupled section 13 includes melt zone 131 and the conical section positioned at 131 both ends of melt zone
132, the diameter of each conical section 132 gradually increases outward from melt zone 131, is located at the conical section of 13 front end of connection coupled section
132 couple simultaneously with the rear end of transport part 121 of a upper signal replication section 12 and the rear end of delay portion 122, and positioned at connection
The conical section 132 of 13 rear end of coupled section replicates the front end of the front end and delay portion 122 of the transport part 121 of section 12 with next signal
It couples simultaneously.
Further, Fig. 2 is referred to, the front end of each signal input sub-optical fibre 111 is pierced by protection box 2, and exports coupling
The rear end for closing section 14 is equally pierced by protection box 2.
Finally, it should be noted that foregoing description is only the preferred embodiment of the present invention, the ordinary skill people of this field
Member under the inspiration of the present invention, without prejudice to the purpose of the present invention and the claims, can make table as multiple types
Show, such transformation is each fallen within protection scope of the present invention.
Claims (5)
1. a kind of pulse signal reproducer based on optical fiber, it is characterised in that：Including single mode optical fiber (1), the single mode optical fiber (1) packet
Include the input coupling section (11) and output coupling section (14) for being located at both ends, the input coupling section (11) and output coupling section
(14) there is the alternately signal replication section (12) of connection and connection coupled section (13), the rear end of the input coupling section (11) between
It is coupled with the front end of first signal replication section (12), front end and the last one signal replication section of the output coupling section (14)
(12) rear end coupling；
The signal replication section (12) includes mutually independent transport part (121) and delay portion (122), any connection coupling
The front end of section (13) couples simultaneously with the rear end of a upper transport part (121) and delay portion (122), same connection coupled section (13)
Rear end coupled simultaneously with the front end of next transport part (121) and delay portion (122), in n-th signal replication section (12), prolong
The length in slow portion (122) grows 2 than the length of transport part (121)N-1vt0；
Wherein, N is positive integer, and v is transmission speed of the light pulse signal in single mode optical fiber (1), t0For the adjacent smooth arteries and veins after duplication
Rush the interval time of signal.
2. the pulse signal reproducer according to claim 1 based on optical fiber, it is characterised in that：The input coupling section
(11) there is at least one signal input sub-optical fibre (111).
3. the pulse signal reproducer according to claim 1 based on optical fiber, it is characterised in that：The connection coupled section
(13) include melt zone (131) and the conical section (132) positioned at melt zone (131) both ends, the diameter of each conical section (132)
Gradually increase outward from melt zone (131).
4. the pulse signal reproducer according to claim 1 based on optical fiber, it is characterised in that：In the single mode optical fiber
(1) outside is provided with protection box (2), and the front end of the input coupling section (11) and the rear end of output coupling section (14) are pierced by
Protection box (2).
5. the pulse signal reproducer according to claim 1 based on optical fiber, it is characterised in that：The nearby optical pulses letter
Number interval time t0More than the pulse width of light pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810284498.7A CN108444606A (en) | 2018-04-02 | 2018-04-02 | Pulse signal reproducer based on optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810284498.7A CN108444606A (en) | 2018-04-02 | 2018-04-02 | Pulse signal reproducer based on optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108444606A true CN108444606A (en) | 2018-08-24 |
Family
ID=63198785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810284498.7A Pending CN108444606A (en) | 2018-04-02 | 2018-04-02 | Pulse signal reproducer based on optical fiber |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113439200A (en) * | 2019-02-18 | 2021-09-24 | 英国国防部 | Method and apparatus for measuring pulse signals with high dynamic range |
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