CN106100744A - loop tunable dispersion compensation method and device - Google Patents
loop tunable dispersion compensation method and device Download PDFInfo
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- CN106100744A CN106100744A CN201610608539.4A CN201610608539A CN106100744A CN 106100744 A CN106100744 A CN 106100744A CN 201610608539 A CN201610608539 A CN 201610608539A CN 106100744 A CN106100744 A CN 106100744A
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- loop
- dcf
- dispersion compensation
- tunable dispersion
- photoswitch
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- 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
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2525—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
A kind of loop tunable dispersion compensation method and device, in the input input loop of the loop that optical signals DCF is formed and circulate wherein, the outfan output of the optical signals loop after dispersion compensation several times, the present invention utilizes DCF loop to carry out equivalent DCF long link, decrease the usage amount of DCF, produce bigger compensation dosage, the tunable of chromatic dispersion compensation quantity can be realized by the control signal changing photoswitch simultaneously, be capable of seamless compatibility with existing fiber network.
Description
Technical field
The present invention relates to the technology of a kind of fiber optic communication field, specifically a kind of loop tunable dispersion compensation method and
Device.
Background technology
In fiber optic communication, dispersion and nonlinear effect are more and more prominent on the impact of signal.Transfer rate is the highest, dispersion
Affect the biggest.Dispersion compensating fiber (Dispersion Compensation Fiber, DCF) is as a kind of Passive Dispersion Compensator
Element, it is possible to 1st order chromatic dispersion and 2nd order chromatic dispersion are compensated simultaneously.But, due to the construction features of DCF own, fibre loss is relatively big,
Volume is big, and cannot change its negative dispersion amount produced.
Summary of the invention
The present invention is directed to prior art and can only realize the dispersion compensation ability raising of 2 times, and be fixing dispersion compensation
The defects such as ability, are proposed a kind of loop tunable dispersion compensation method and device, not only dispersion can be mended by circulation repeatedly
The ability of repaying improves many times, additionally it is possible to by on-off control cycle-index, such that it is able to compensate the color of different linkage length neatly
Dissipate.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of loop tunable dispersion compensation method, the input of the loop formed by optical signals DCF is defeated
Enter in loop and circulate wherein, the outfan output of the optical signals loop after dispersion compensation several times.
The circulation number of turns of the described optical signal in loopWherein: DchFor standard single-mode fiber
Abbe number, LSMFFor optical signal transmission length, DDCFFor the abbe number of loop, LDCFDCF length for loop.
Described loop is provided with the photoswitch as outfan and input.
The present invention relates to a kind of loop tunable dispersion compensation device realizing said method, including: DCF and conduct input
End, the photoswitch of outfan, wherein: DCF two ends are connected to form loop with photoswitch respectively.
Described loop is provided with the Erbium Doped Fiber Amplifiers EDFAs (EDFA) for optical signal amplification.
Described photoswitch is connected with square-wave generator the control signal control sent by it.
The cycle of the square wave that described square-wave generator sends is the integral multiple of DCF length mapping time, wherein: length is reflected
Penetrate the timeL is the length of DCF, and n is refractive index, and c is the light velocity.
Described square-wave generator is microcomputer development plate or waveform generator (WG).
Described photoswitch is 2 × 2 photoswitches.
2 × 2 described photoswitches are connected with Two-port netwerk photoswitch.
Technique effect
Compared with prior art, the present invention utilizes DCF loop to carry out equivalent DCF long link, decreases the usage amount of DCF, produces
Raw bigger compensation dosage, can realize the scalable of chromatic dispersion compensation quantity, with existing simultaneously by the control signal changing photoswitch
Fiber optic network is capable of seamless compatibility.
Accompanying drawing explanation
Fig. 1 is loop tunable dispersion compensation device structural representation；
Fig. 2 is experimental system structure chart；
Fig. 3 is 10Gbits/s signal waveform Comparative result figure before and after loop dispersion compensation.
Detailed description of the invention
Elaborating embodiments of the invention below, the present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following enforcement
Example.
Embodiment 1
As it is shown in figure 1, the loop tunable dispersion compensation device of the present embodiment includes: DCF and as input, outfan
Photoswitch, wherein: DCF two ends are connected to form loop respectively with photoswitch, photoswitch is 2 × 2 photoswitches.This 2 × 2 photoswitch by
The signal of telecommunication that outside square-wave generator sends controls.
Loop tunable dispersion compensation method in the present embodiment includes first DCF being formed loop, then optical signals ring
In the input input loop of road and circulate wherein, finally, the output of the optical signals loop after dispersion compensation several times
End output.
Described square-wave generator is microcomputer development plate, such as: field programmable gate array (FPGA), or uses arbitrarily
Waveform generator.At the outfan of loop, the optical signal in loop can present with straight-through optical signal and alternately exports, so 2 × 2
Photoswitch (OFS) front end or rear end set one for the Two-port netwerk photoswitch suppressing through connect signal.
2 × 2 described photoswitches have four ports, and port numbering is respectively 1,2,3 and 4.DCF respectively with port 2 and 4 phase
Even.When the control signal that WG sends is in high level, 2 × 2 photoswitches are in crossing condition, i.e. port be in 14,23 be connected
State, external optical signal inputs, and interior lights signal exports.When the control signal that WG sends is in low level, at 2 × 2 photoswitches
In pass-through state, i.e. port is in 13,24 attached state, and loop is closed, and the optical signal in loop circulates in the loop.
Dispersion compensation i.e. negative dispersion produced by the single cycle of described loop, can pass through length mapping timeDetermining the optical signal length that can carry in loop, L is the length of DCF, and n is refractive index.Length mapping time t is i.e.
The time of a circle is circulated in the loop for optical signal.Therefore, t have to be larger than the response time of 2 × 2 photoswitches, to ensure output
Complete signal can be obtained, be also greater than the half of the manifolding time of 2 × 2 photoswitches, to ensure that 2 × 2 photoswitches can have
The control loop circuit state of effect.
Described square-wave generator is by changing the cycle of square wave and accounting for merit than the recurrent state changing loop.Utilize long
Degree mapping time controls loop circuit state.The cycle of square wave must be the integral multiple of DCF length mapping time, and multiple is equal to ring
The road circulation number of turns.High level controls to enter the optical signal length of loop, and optical signal length is less than DCF length.Looped cycle time
Number has following relation with optical signal transmission distance, fiber lengths: circulate the number of turnsWherein: DchFor mark
The chromatic dispersion coefficient of quasi-monomode fiber, LSMFFor optical signal transmission length, DDCFFor the abbe number of loop, LDCFFor loop
DCF length.
As in figure 2 it is shown, in dispersion compensation experiment, transfer rate is 10Gbits/s, including: the single-mode fiber of 60km, 5km
DCF, 2 × 2 photoswitches of nanosecond and wave generator.Laser in figure is laser instrument, and PC is Polarization Controller；DC
Bias is current source, and MZM is manipulator, and SMF is single-mode fiber, and FS is fiber switch, and PD is detector, and OSC is oscillograph,
Attenuator is attenuator, and PPG is pattern generator.
Described single-mode fiber is formed by volume two 25km and volume 10km optical fiber cascade, and loss is about 0.2dB/km, dispersion
Coefficient is about 16ps/ (ns km).The loss of DCF is 0.55dB/km, and abbe number is-107ps/ (ns km), in theory can
Enough compensate the single-mode fiber of 33.5km.
The driving power supply of 2 × 2 described photoswitches is 12V, and the high level as the signal of telecommunication of control signal is less than 5V,
Low level is 0V, and driving manifolding speed is 100kHz, and response time is less than 300ns, and insertion loss is 1.3dB to the maximum.WG sends out
The square wave amplitude 3V gone out, cycle 50us, accounting for merit ratio is 50%.
As it is shown on figure 3, make the optical signal in loop and through connect signal by the gain of the EDFA in regulation experimental circuit
In oscillograph separately, such that it is able to distinguish through loop obtain optical signal i.e. Fig. 3 middle and upper part eye pattern of dispersion compensation with not
Obtaining through connect signal i.e. Fig. 3 middle and lower part eye pattern of dispersion compensation, contrast finds that the use of closed circuit makes the dispersion of signal obtain
To compensating.
Compared with prior art, the present invention utilizes DCF loop to carry out equivalent DCF long link, decreases the usage amount of DCF, produces
Raw bigger compensation dosage, can realize the tunable of chromatic dispersion compensation quantity, with existing by the control signal changing photoswitch simultaneously
Fiber optic network is capable of seamless compatibility.During as receiving terminal, after loop compensation, residual dispersion is controlled in certain limit
In.When doing transmitting terminal, it is possible to produce negative dispersion, such that it is able to be used for pre-compensating for.
Claims (9)
1. a loop tunable dispersion compensation method, it is characterised in that the loop input input ring that optical signals DCF is formed
In road and circulate wherein, the outfan output of the optical signals loop after dispersion compensation several times；
The circulation number of turns of the optical signal in the loop of described DCF compositionWherein: DchFor standard list
The abbe number of mode fiber, LSMFFor optical signal transmission length, DDCFFor the abbe number of loop, LDCFDCF length for loop.
Loop tunable dispersion compensation method the most according to claim 1, is characterized in that, be provided with as defeated in described loop
Go out the photoswitch of end and input.
3. a loop tunable dispersion compensation device, it is characterised in that including: DCF and the light as input, outfan are opened
Close, wherein: DCF two ends are connected to form loop with photoswitch respectively.
Loop tunable dispersion compensation device the most according to claim 3, is characterized in that, be provided with for light in described loop
The Erbium Doped Fiber Amplifiers EDFAs that signal amplifies.
Loop tunable dispersion compensation device the most according to claim 3, is characterized in that, described photoswitch is connected with square wave and sends out
Raw device the control signal sent by it control.
Loop tunable dispersion compensation device the most according to claim 5, is characterized in that, described square-wave generator sends
The cycle of square wave is the integral multiple of DCF length mapping time, wherein: length mapping timeL is the length of DCF, and n is folding
Penetrate rate.
Loop tunable dispersion compensation device the most according to claim 6, is characterized in that, described square-wave generator is monolithic
Machine development board or waveform generator.
Loop tunable dispersion compensation device the most according to claim 3, is characterized in that, described photoswitch is that 2 × 2 light are opened
Close.
Loop tunable dispersion compensation device the most according to claim 8, is characterized in that, 2 × 2 described photoswitches are connected with two
Port optical switchs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610608539.4A CN106100744B (en) | 2016-07-29 | 2016-07-29 | The compensation method of loop tunable dispersion and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610608539.4A CN106100744B (en) | 2016-07-29 | 2016-07-29 | The compensation method of loop tunable dispersion and device |
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| CN106100744A true CN106100744A (en) | 2016-11-09 |
| CN106100744B CN106100744B (en) | 2018-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818237A (en) * | 2019-03-28 | 2019-05-28 | 上海交通大学 | Ultrashort laser pulse orthopedic systems based on fiber optic loop circular modulating time grating |
| CN113804412A (en) * | 2021-07-20 | 2021-12-17 | 广东工业大学 | Optical fiber device micro-chromaticity dispersion measuring device based on ring light path structure |
| CN113804412B (en) * | 2021-07-20 | 2024-05-31 | 广东工业大学 | Micro-chromatic dispersion measuring device of optical fiber device based on annular light path structure |
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| CN1168579A (en) * | 1996-04-02 | 1997-12-24 | 康宁股份有限公司 | Switchable fiber optic device for fiber transmission system and components thereof |
| CN1390003A (en) * | 2001-05-16 | 2003-01-08 | 古河电气工业株式会社 | Variable light-dispersing compensation model |
| CN1412967A (en) * | 2001-10-17 | 2003-04-23 | 华为技术有限公司 | Two-way optical fiber dispersion compensation device |
| CN205986880U (en) * | 2016-07-29 | 2017-02-22 | 上海南明光纤技术有限公司 | Harmonious chromatic dispersion compensation arrangement of loop |
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2016
- 2016-07-29 CN CN201610608539.4A patent/CN106100744B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168579A (en) * | 1996-04-02 | 1997-12-24 | 康宁股份有限公司 | Switchable fiber optic device for fiber transmission system and components thereof |
| CN1390003A (en) * | 2001-05-16 | 2003-01-08 | 古河电气工业株式会社 | Variable light-dispersing compensation model |
| CN1412967A (en) * | 2001-10-17 | 2003-04-23 | 华为技术有限公司 | Two-way optical fiber dispersion compensation device |
| CN205986880U (en) * | 2016-07-29 | 2017-02-22 | 上海南明光纤技术有限公司 | Harmonious chromatic dispersion compensation arrangement of loop |
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| Title |
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| M.SUZUKI等: "20Gbit/s-based soliton WDM transmission over transoceanic distance using periodic compensation of dispersion and its slope", 《ELECTRONICS LETTERS》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818237A (en) * | 2019-03-28 | 2019-05-28 | 上海交通大学 | Ultrashort laser pulse orthopedic systems based on fiber optic loop circular modulating time grating |
| CN109818237B (en) * | 2019-03-28 | 2021-01-01 | 上海交通大学 | Ultrashort laser pulse shaping system based on optical fiber ring circulation modulation time grating |
| CN113804412A (en) * | 2021-07-20 | 2021-12-17 | 广东工业大学 | Optical fiber device micro-chromaticity dispersion measuring device based on ring light path structure |
| CN113804412B (en) * | 2021-07-20 | 2024-05-31 | 广东工业大学 | Micro-chromatic dispersion measuring device of optical fiber device based on annular light path structure |
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| CN106100744B (en) | 2018-04-06 |
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Effective date of registration: 20191111 Address after: 200240 Dongchuan Road, Shanghai, No. 800, No. Patentee after: Ma Lin Address before: 4, No. 555, Lane 3111, 201401 West Ring Road, Shanghai, Fengxian District, -590 Patentee before: SHANGHAI NET MILES TECHNOLOGY CO.,LTD. Effective date of registration: 20191111 Address after: 200240 Dongchuan Road, Shanghai, No. 800, No. Co-patentee after: Du Jiangbing Patentee after: Ma Lin Co-patentee after: Zhang Wenjia Co-patentee after: Bai Linbin Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Patentee before: Ma Lin |
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Effective date of registration: 20200312 Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 951 Building 5 layer 1 Patentee after: Shanghai Guangzhi Technology Co.,Ltd. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Co-patentee before: Du Jiangbing Patentee before: Ma Lin Co-patentee before: Zhang Wenjia Co-patentee before: Bai Linbin |
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