CN103780311A - Light-source management method supporting WDM grid frequency standard of coherent light network - Google Patents
Light-source management method supporting WDM grid frequency standard of coherent light network Download PDFInfo
- Publication number
- CN103780311A CN103780311A CN201410017809.5A CN201410017809A CN103780311A CN 103780311 A CN103780311 A CN 103780311A CN 201410017809 A CN201410017809 A CN 201410017809A CN 103780311 A CN103780311 A CN 103780311A
- Authority
- CN
- China
- Prior art keywords
- frequency
- optical
- light
- frequency comb
- network
- 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.)
- Pending
Links
Images
Abstract
The invention provides a light-source management method supporting a WDM grid frequency standard of a coherent light network. The method includes: an optical-frequency-comb generator generates an optical frequency comb with distance precision; the optical frequency comb generator sends the optical frequency comb to each optical network node or after the optical frequency comb passes through a demultiplexer, each demultiplexed spectrum line which undergoes demultiplexing is sent to a corresponding network node; each network node extracts a corresponding single spectral line from the optical frequency comb or obtains directly a single spectral line which passes the demultiplexer; and a single spectral line of the optical frequency comb is used as a light carrier for local sending, local oscillating light used for receiving or injection light used for a local laser device. The optical frequency comb is highly stable in frequency output, precise in frequency interval and free from frequency deviation. The optical-frequency comb is sent to each optical node and can be used as light carrier, local oscillating light or light sent out by a main laser device for light injection and locking so that frequency and phase locking of semiconductor laser devices at the optical network nodes is realized.
Description
Technical field
The present invention relates to optical communication technique, more particularly to optical-fiber network technology.
Background technology
Detection, the demodulation, simple in construction, low cost of signal are generally realized at the network node of existing optical-fiber network using incoherent technique.However, incoherent technique receiving sensitivity is low, the low inherent shortcoming of the availability of frequency spectrum so that it is not suitable for long-range Backbone Transport.The receiving sensitivity of coherent detection is high, the availability of frequency spectrum is high, is more beneficial for improving the availability of frequency spectrum, realizes Large Copacity, the Optical Fiber Transmission of long range.Although the cost of relevant optical detection is also higher at present, though it is foreseeable that develop coherent receiver on silicon photon platform if can realize, it is possible to significantly reduce the cost of coherent detection so that coherent receiver is widely applied in various optical communication nets.
At present, the framework of optical-fiber network mostly uses wavelength-division multiplex（WDM）Mode.In order to meet development of optical network needs, the relevant optical-fiber networks of WDM very likely turn into the Main Patterns that future optical networks develop.Traditional wave division multiplex mode, mostly using semiconductor laser or tunable laser.The advantage of semiconductor laser is that size is small, coupling efficiency is high, fast response time etc.；Tunable laser then can in reduction system laser quantity, improve network flexibility, reduction network complexity.However, the wavelength and frequency stability of semiconductor laser, Output optical power etc. itself limitation are still the principal element for limiting optical-fiber network progress.The WDM networks of especially coherent detection are higher to laser frequency stability requirement.
In WDM networks, multi-wavelength LD, LD array or wide spectrum light source can solve the problems, such as multi-wavelength, it is 100GHz or 50GHz that International Telecommunications Union (ITU), which defines light carrier channel separation in fiber optic communication, corresponding wavelength spacing is respectively 0.8nm and 0.4nm, and this just requires the distributed feedback on each channel（Distributed Feedback Laser, DFB）The wavelength of laser has higher stability.Substantial amounts of laser can be used in a fairly large WDM network, but the wavelength of these lasers is all respective independent control, not global cooperation.Once the wavelength for having some laser occurs in that skew, crosstalk will be produced to adjacent WDM channels, the scale of WDM networks is bigger, and the probability for laser wavelength drift occur is increased by, and the cross-interference issue that it is caused is more serious.
Meanwhile, current WDM optical-fiber networks are by International Telecommunication Union（ITU-T）The limitation of wavelength grid and frequency spectrum resource, transmission link is generally configured with frequency spectrum by excess, and frequency spectrum resource utilization rate is relatively low, it is impossible to effective carrying Low-rate traffic and ultrahigh speed business.Theory and technology that the WDM grids that break traditions are defined, using the new network framework of micro-grid lattice, by the development trend as future optical networks.In particular with the lifting to network transmission capacity, dynamic and requirement on flexibility, the main flow framework as future optical networks is such as developed, can further increase the requirement to frequency stability by the network structure based on micro-grid lattice towards 12.5GHz intervals.Even if however, carrier class laser using wavelength locker by Frequency Locking in International Telecommunication Union（ITU）Defined standard frequency, the low precision for still having about 2GHz, the wavelength that will have a strong impact on actual transmissions in transmission performance, WDM networks is lack of standardization.Under the further demand of increase spectrum efficiency, all WDM passages may be transmitted in the way of super passage, no longer using traditional WDM frequency interval, and so requirement to laser can not just be completed by the laser control of separation.
, it is necessary to carry out the processing such as signal synchronization, offset estimation, phase noise estimation, judgement in the Digital Signal Processing of coherent detection technology.Digital Signal Processing in coherent detection technology is mainly offset estimation and phase noise estimation., it is necessary to using the finite impulse response filter of big tap coefficient during long-distance optical fiber transmission（FIR）Phase noise compensation is realized, can be balanced by overlapping frequency domain dispersion（OFDE）Etc. the tap coefficient that technology reduces FIR.During short-distance transmission, phase noise compensation can be realized using the FIR filter of less tap coefficient.Now, a prominent question is offset estimation, and its computational complexity is high, it is larger to consume energy, and strongly limit application of the coherent detection technology in optical-fiber network.Especially, it is contemplated that the complexity of frequency excursion algorithm can be increased by being likely to result under laser about 2GHz frequency drift, direct detection under the decline of receiving sensitivity, coherent detection, and coherent receiver frequency deviation estimation be main energy consumption module.In addition, coherent detection is higher to the linewidth requirements of laser, upgrading especially with network transmission capacity is higher by the requirement to line width, it is necessary to using the modulation format of spectral efficient.Therefore, most of experiments are all to use outside cavity gas laser（ECL）Narrow linewidth output is obtained, still, corresponding cost is also higher.Therefore, the relevant optical-fiber network of frequency stabilization can effectively reduce energy consumption, network complexity, and improving performance is the necessary requirement applied to optical-fiber network.
The content of the invention
The technical problems to be solved by the invention are, a kind of light source for causing each passage in optical-fiber network is provided all accurately to be locked in defined frequency, and with certain OSNR, the light source management method of the WDM frequency grid standards of relevant optical-fiber network can be supported, simplifies complexity and the power consumption of coherent optical heterodyne communicatio.
The present invention is the light source management method for the WDM frequency grid standards for supporting relevant optical-fiber network to solve the technical scheme that above-mentioned technical problem is sampled, including：
Frequency comb maker, which is produced, has the accurate frequency comb of spacing；
Frequency comb is sent at each optical network node by frequency comb maker；Or, after the demultiplexed device of frequency comb, each spectrum line after demultiplexing is sent to map network node；
Each network node extracts corresponding single spectrum line from frequency comb, or, directly obtain single spectrum line after demultiplexed device；The single spectrum line of frequency comb is used as the light carrier of local transmission, the local oscillator light of reception or the injection light as local laser.
Frequency comb is made up of the accurate spectrum line of certain amount spacing, and every spectrum line comes from same light source, and coherence is good.The rate-adaptive pacemaker stability of frequency comb is very high, and frequency interval is accurate, without frequency deviation.Frequency comb maker produces many accurate spectrum lines of spacing in the present invention, and every spectrum line is considered as the light that a continuous light laser is sent.The spectrum line of standard frequency is sent to each network node by way of frequency comb so that the frequency of light source is accurately locked in assigned frequency in network, by there is no the laser of free-running in network.The frequency comb of generation is sent at each optical network node, can be as light carrier, local oscillator light, or the light sent as main laser carries out optical injection-locked, realizes frequency and PGC demodulation to semiconductor laser at optical network node.
In optical-fiber network, all light sources are all generated by the way of frequency comb or are standardized management by optical injection-locked, it is ensured that frequency stability.Due to every light comb tooth in frequency comb（Each spectrum line in frequency comb）It is relevant, the light comb tooth number of generation is adjustable and frequency interval is adjustable so that signal bandwidth is dynamically adjustable in transmission, is conducive to strengthening the flexibility of network.All light sources, such as signal optical source and local oscillator light source have all carried out frequency standardization by frequency comb and managed, it is concerned with each other between each broach in frequency comb, therefore, when carrying out digital coherent demodulation using digital coherent receiver at each network node, the complexity of offset estimation can be greatly simplified, energy consumption, computational complexity is significantly reduced, in this manner it is possible to effectively utilize coherent receiver receiving sensitivity height and the high advantage of the availability of frequency spectrum.
The WDM frequency grids standardization of relevant optical-fiber network is supported using frequency comb, mainly has the application of two aspects, is on the one hand that directly can provide light source for each optical network node；On the other hand optical injection-locked can be carried out as injection light and line frequency and PGC demodulation is entered to the light of existing semiconductor laser.The first application, by frequency comb directly as light source, because frequency comb frequency stability is high, without frequency deviation, interval is adjustable, therefore, it can be used to realize that WDM frequency grids are standardized, while strengthening network dynamic.However, this method needs to transform existing optical-fiber network, extra laser is not needed at optical network node, although cost can be reduced, but the cost of transformation is also at a relatively high.Second of application can need not then transform existing network framework, enter the locking of line frequency and phase to existing semiconductor laser by frequency comb, make its accurate lock due in the frequency grid standard of future WDM networks, the support and upgrading to existing network are realized comprehensively.
The generation that the light source management method of the WDM frequency grid standards of the relevant optical-fiber network of support of the invention includes normalized frequency light source is delivered in whole optical-fiber network with lossless.The frequency comb of generation is in network transmission process, with the increase of Optical Fiber Transmission distance, the problem of bringing therewith is the decline of luminous power, and the power at frequency comb arrival network node may be caused too low or traditional image intensifer is used in transmitting procedure, because the presence of noise is annihilated.In order that frequency comb is not annihilated in transmitting procedure, reach has certain OSNR, it is necessary to which the frequency comb to the frequency standard of generation carries out lossless light amplification at optical network node.Further, lossless amplification is carried out to the spectrum line after the frequency comb or demultiplexing in network transmission process.Lossless amplification can specifically be carried out by way of erbium-doped fiber amplifier, reflective semiconductor amplifier or optical injection-locked.
The beneficial effects of the invention are as follows all light sources are all generated by the way of frequency comb or carry out frequency standard management by optical injection-locked in optical-fiber network, it is ensured that frequency stability.Because every frequency comb is relevant, and frequency interval is adjustable so that signal bandwidth is dynamically adjustable in transmission, is conducive to strengthening the flexibility of network.All light sources, such as signal optical source and local oscillator light source have all carried out frequency standardization by frequency comb and managed, it is concerned with each other between frequency comb, therefore, when carrying out digital coherent demodulation using digital coherent receiver at each network node, the complexity of offset estimation can be greatly simplified, energy consumption, computational complexity is significantly reduced, in this manner it is possible to effectively utilize coherent receiver receiving sensitivity height and the high advantage of the availability of frequency spectrum.
Brief description of the drawings
Fig. 1 for frequency comb mode under realize optical networks carrier wave distribution schematic diagram；
Fig. 2 is realizes the lossless enlarged diagram of standard light frequency by optical injection-locked in the present invention；
Fig. 3 is WDM frequency grid standard delivery methods schematic diagram of the frequency comb as light source；
Fig. 4 is that frequency comb is used for the WDM frequency grid standard delivery methods schematic diagrames of optical injection-locked；
Fig. 5 is the exemplary plot of the invention in WDM fiber transmission network application；
The exemplary plot that Fig. 6 applies for the present invention at WDM optical network nodes.
Embodiment
The spectrum line of standard frequency is sent to each network node by the way of frequency comb, as shown in Figure 1 so that the frequency of light source is accurately locked in assigned frequency in network, there is no the laser of free-running.WDM is concerned with optical-fiber network, and the light source of multiple different frequencies is used for signal transmission.Correspondingly, frequency comb maker can produce many accurate spectrum lines of spacing, and every spectrum line is considered as the light that a continuous light laser is sent, and pass through demultiplexing（DEMUX）After be sent at heterogeneous networks node, or frequency comb is directly sent to each network node, extracting corresponding spectrum line by each network node is used as light source.Each spectrum line is sent at each optical network node in the frequency comb of generation, can be as light carrier, local oscillator light, or the light sent as main laser carries out optical injection-locked, realizes frequency and PGC demodulation to semiconductor laser at optical network node.
When frequency comb is reached at each network node, there may be substantial amounts of optical frequency line, accordingly, it would be desirable to extract corresponding single lasing light emitter from frequency comb.Therefore, at each network node, it is necessary to one can extract the module of single lasing light emitter from frequency comb, extract corresponding spectrum line and meet application at heterogeneous networks node.
The generation of frequency comb, can be by mode-locked laser or to continuous-wave laser (Continuous-wave, CW the different modes such as forceful electric power optical modulator) are carried out to realize, to produce frequency stabilization, be spaced accurate spectrum line, signal light carrier, local oscillator light source etc. are provided for optical-fiber network.Quantity, frequency interval of frequency comb etc. are all adjustable.
The extraction of single lasing light emitter in frequency comb, at optical network node, corresponding spectrum line to be extracted as light carrier or as injection light progress optical injection-locked according to business demand.The extraction of single laser, in the case where frequency comb frequency interval is big, the method that usual more than GHz can be filtered using light is realized.During the frequency interval very little of frequency comb, Fabry Perot chamber can be passed through（Fabry–Pérot cavity）Change the frequency interval of frequency comb, the frequency comb at hundred MHz frequency intervals is such as changed over to the frequency comb of GHz frequency intervals, so as in the case of realizing frequency comb frequency interval very little, the single spectrum line of frequency needed for accurately extracting, effectively solves accurately to extract the requirement of single lasing light emitter at optical network node from frequency comb.
Frequency comb to the frequency standard of generation carries out lossless amplification, is mainly used in compensating the decay in optical link, such as fibre loss, optical branching device, connection are first-class, and the method that can be used is by erbium-doped fiber amplifier（EDFA）Or reflective semiconductor amplifier（RSOA）Method Deng image intensifer realizes light amplification, and whether this method accordingly can also amplify to noise, cause received signal quality to decline, depending on the influence of noise of optical amplifier in the range of system tolerant.Therefore, can also be by the method for optical injection-locked, realize the lossless amplification to standard light frequency, as shown in Figure 2, the output light of frequency comb maker is injected into the laser at corresponding optical network node, under certain condition, the laser at optical network node just can set up stable oscillation stationary vibration at injection light frequency, its free-running pattern is then suppressed, so as to obtain stable output.Optical injection-locked technology can obtain high-quality, high-power laser output.
Optical frequency standarad transmission network is high due to frequency comb frequency stability, without frequency deviation, can greatly simplify the complexity of optical-fiber network medium wavelength locking, improve the precision of wavelength locking so that existing optical-fiber network more standardizes, rationalized.Signal optical source and local oscillator light source are homologous, are conducive to simplifying the complexity of coherent detection, cost, improve the performance of coherent detection.In addition, if be to transmit frequency comb with a frequency standard private subnets network, can on the basis of this private subnets network transmitting portions extraneous information, such as the control protocol for supporting OBS.At present, frequency comb maker can be produced within more than 30, or even more light comb teeth, power fluctuation 3dB, and more rich frequency spectrum resource is provided for optical-fiber network.Be spaced between light comb tooth it is adjustable, be more beneficial for adapt to dynamic optical network framework.
Many equally spaced light comb teeth are produced by frequency comb maker.The frequency comb of high frequency stability is to realize the basis to optical network standards, standardization.Frequency comb maker can be produced by mode-locked laser or to modes such as continuous-wave laser forceful electric power light modulations, after Power Control, the power fluctuation with very little.Every frequency comb comes from same light source, and coherence is good, and output frequency stability is very high, is highly suitable for the planningization management in optical networks source.
The transmission of the WDM frequency grid standards of relevant optical-fiber network is realized using frequency comb, a kind of method is that frequency comb is sent directly into each optical network unit all directly to be provided by frequency comb there is provided all light sources in signal optical source or local oscillator light, i.e. optical-fiber network, as shown in Figure 3；Another method is to regard frequency comb as light that main laser is sent, enters line frequency and PGC demodulation to the light of existing semiconductor laser by optical injection-locked as injection light, as shown in Figure 4.
In Fig. 3, frequency comb maker is used to continuous-wave laser（CW）The mode for carrying out forceful electric power light modulation is realized.Using Fiber Bragg Grating FBG（FBG）Carry out light filtering and select required single laser.In view of erbium-doped fiber amplifier（EDFA）Volume is big, the light near 1550nm can only be amplified, and noise is exaggerated simultaneously, is not suitable for carrying out light amplification.Reflective semiconductor amplifier（RSOA) saturation luminous power and small-signal gain are all larger, and low cost, noise coefficient is relatively small, and 3dB gains spectrum width is up to 40~45nm, it is therefore possible to use RSOA is used for light amplification.
The frequency comb that substantial amounts of, frequency interval is stable, power fluctuation is small is produced by frequency comb maker.Here it is possible to generate the frequency comb of more than 30 by the way of to continuous-wave laser forceful electric power light modulation, power fluctuation is within 1dB, and the frequency comb spectrogram of generation is as shown in inset of fig. 3.Frequency interval can be determined by the RF signal sources in frequency comb maker, by changing the frequency of RF signal sources, dynamic adjustment frequency comb frequency interval.The generation of frequency comb can also be produced using methods such as mode-locked lasers, change the frequency interval of frequency comb by Fabry Perot chamber.FBG is used to propose single lasing light emitter from frequency comb, and light amplification is carried out to corresponding lasing light emitter, so that being sent to corresponding optical network unit is used to provide signal optical source or carries out coherent detection as local oscillator light source.
In Fig. 4, regard the light that frequency comb is produced as light that main laser is sent, line frequency and PGC demodulation are entered to semiconductor laser in existing network by way of optical injection-locked, realize WDM frequency grid standardized managements.The frequency comb that frequency comb maker is produced is transmitted in a network after optical branching device light splitting, is reached after a certain optical network unit, after being filtered through light, the single spectrum line of frequency needed for extracting.It is equally possible that the single spectrum line after frequency comb is demultiplexed is sent directly at optical network unit, extra single lasing light emitter extraction module now, at each NE is no longer needed.Regard frequency comb as light that main laser sends to existing semiconductor laser and carry out optical injection-locked, realize the frequency and PGC demodulation of noise spectra of semiconductor lasers.The advantage of this method is that can enter line frequency and PGC demodulation to existing semiconductor laser in network by frequency comb in the case where not changing existing network infrastructure, and frequency comb frequency accuracy is high, stability is strong, realizes the standardization of WDM frequency grids.Therefore, no matter using frequency comb as light source or injection light, the transmission of the WDM frequency grid standards of relevant optical-fiber network can be realized.
It is as shown in Figure 5 that the management method of the WDM frequency grid standards of this relevant optical-fiber network is applied particularly to WDM fiber transmission network.Application exemplary plot such as Fig. 5 in WDM optical transport networks（a）It is shown.Frequency standard module is by frequency comb maker, demultiplexer, optical branching device composition, such as Fig. 5（b）It is shown.After frequency comb is demultiplexed, it is divided into two beams through optical branching device, is separately sent to transmitting terminal and receiving terminal, coherent detection can be carried out directly as signal optical source and local oscillator light source, or injection locking is carried out to existing laser so that the light source in WDM networks is all strictly locked in defined frequency.OADM is given in the exemplary plot network that the management method of the WDM frequency grid standards of relevant optical-fiber network shown in Fig. 6 is applied at WDM optical network nodes, figure（OADM）The exemplary plot of middle application.Frequency comb module provides local oscillator light for lower terminal is used for coherent detection, and signal optical source is provided for upper terminal.Due to frequency comb frequency stabilization, without frequency deviation, therefore, be conducive to lifting lower terminal coherent detection performance, while the signal optical source of standard frequency is provided for upper terminal, so as to realize multiplexing.
It can be seen that, application of the transmission method of the WDM frequency grid standards of relevant optical-fiber network in WDM networks is widely, and bringing the benefit of many so that the coherent detection of low cost and low complex degree is possibly realized in network more regulation and standardization, receiver.The management method of the WDM frequency grid standards of relevant optical-fiber network can provide single lasing light emitter for network node, can also be directly to transmission frequency comb at optical network node, the extraction of single lasing light emitter is carried out at each optical network node, so, it is same at each optical network node that there is abundant frequency spectrum resource, for OADM etc..Meanwhile, frequency comb frequency spectrum resource enriches, and frequency interval is accurate, and can change frequency comb frequency interval by methods such as optics, change RF signal source frequencies, so so that the communication between across a network is possibly realized.
Claims (5)
1. support the light source management method of the WDM frequency grid standards of relevant optical-fiber network, it is characterised in that including：
Frequency comb maker, which is produced, has the accurate frequency comb of spacing；
Frequency comb is sent at each optical network node by frequency comb maker；Or, after the demultiplexed device of frequency comb, each spectrum line after demultiplexing is sent to map network node；
Each network node extracts corresponding single spectrum line from frequency comb, or, directly obtain single spectrum line after demultiplexed device；The single spectrum line of frequency comb is used as the light carrier of local transmission, the local oscillator light of reception or the injection light as local laser.
2. the light source management method of the WDM frequency grid standards of relevant optical-fiber network is supported as claimed in claim 1, it is characterised in that frequency comb maker produces frequency comb using mode-locked laser or by forceful electric power light modulating method.
3. the light source management method of the WDM frequency grid standards of relevant optical-fiber network is supported as claimed in claim 1, it is characterised in that lossless light amplification is carried out to the spectrum line after the frequency comb or demultiplexing in network transmission process.
4. the light source management method of the WDM frequency grid standards of relevant optical-fiber network is supported as claimed in claim 1, it is characterised in that each network node extracts corresponding single spectrum line using optical filter or optical injection-locked from frequency comb.
5. the light source management method of the WDM frequency grid standards of relevant optical-fiber network is supported as claimed in claim 4, it is characterized in that, light amplification is carried out using erbium-doped fiber amplifier, reflective semiconductor amplifier in the case of signal to noise ratio condition is preferable, lossless light amplification can be realized by the way of optical injection-locked in the case where signal to noise ratio condition is poor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410017809.5A CN103780311A (en) | 2014-01-15 | 2014-01-15 | Light-source management method supporting WDM grid frequency standard of coherent light network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410017809.5A CN103780311A (en) | 2014-01-15 | 2014-01-15 | Light-source management method supporting WDM grid frequency standard of coherent light network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103780311A true CN103780311A (en) | 2014-05-07 |
Family
ID=50572203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410017809.5A Pending CN103780311A (en) | 2014-01-15 | 2014-01-15 | Light-source management method supporting WDM grid frequency standard of coherent light network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103780311A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450305A (en) * | 2014-09-23 | 2016-03-30 | 贺利实公司 | Communications device with optical injection locking source and related methods |
| CN106712852A (en) * | 2017-03-01 | 2017-05-24 | 广东科学技术职业学院 | Current injection gain auto adjusting multicast photon radio frequency transmitter |
| CN108988940A (en) * | 2018-08-17 | 2018-12-11 | 中国电子科技集团公司第三十八研究所 | A kind of high-speed digital transmission system suitable for space active digital array |
| CN108981768A (en) * | 2018-09-05 | 2018-12-11 | 哈尔滨工业大学 | Single-ended fast distributed Brillouin Optical domain reflectometer based on optics chirp chain |
| CN111049582A (en) * | 2019-12-17 | 2020-04-21 | 北京无线电计量测试研究所 | Microwave signal real-time synchronization device and method based on microwave photon technology |
| WO2022037563A1 (en) * | 2020-08-21 | 2022-02-24 | 华为技术有限公司 | Light source, optical transmission method, and optical injection locking system |
| CN114337836A (en) * | 2021-11-30 | 2022-04-12 | 电子科技大学 | MZM-based optical frequency comb generation system and application thereof in WDM |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158285A (en) * | 2011-04-18 | 2011-08-17 | 武汉邮电科学研究院 | Method and device for producing paths of coherent light carriers |
| CN102223340A (en) * | 2011-06-20 | 2011-10-19 | 电子科技大学 | Terabit transmission rate coherent light orthogonal frequency division multiplexing (OFDM) system based on optical comb |
| CN102546078A (en) * | 2011-12-31 | 2012-07-04 | 中兴通讯股份有限公司 | Ultra-dense wavelength division multiplexing system and method |
-
2014
- 2014-01-15 CN CN201410017809.5A patent/CN103780311A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158285A (en) * | 2011-04-18 | 2011-08-17 | 武汉邮电科学研究院 | Method and device for producing paths of coherent light carriers |
| CN102223340A (en) * | 2011-06-20 | 2011-10-19 | 电子科技大学 | Terabit transmission rate coherent light orthogonal frequency division multiplexing (OFDM) system based on optical comb |
| CN102546078A (en) * | 2011-12-31 | 2012-07-04 | 中兴通讯股份有限公司 | Ultra-dense wavelength division multiplexing system and method |
Non-Patent Citations (1)
| Title |
|---|
| 张洪波: "《基于光FFT的8*112Gbit/s全光OFDM光纤传输系统》", 《光电子 激光》, vol. 24, no. 3, 31 March 2013 (2013-03-31) * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450305A (en) * | 2014-09-23 | 2016-03-30 | 贺利实公司 | Communications device with optical injection locking source and related methods |
| CN105450305B (en) * | 2014-09-23 | 2019-12-24 | L3贺利实科技公司 | Communication device with light injection locking source and related methods |
| CN106712852A (en) * | 2017-03-01 | 2017-05-24 | 广东科学技术职业学院 | Current injection gain auto adjusting multicast photon radio frequency transmitter |
| CN106712852B (en) * | 2017-03-01 | 2023-04-25 | 广东科学技术职业学院 | Current injection gain self-adjustment multicast photon radio frequency transmitter |
| CN108988940A (en) * | 2018-08-17 | 2018-12-11 | 中国电子科技集团公司第三十八研究所 | A kind of high-speed digital transmission system suitable for space active digital array |
| CN108988940B (en) * | 2018-08-17 | 2020-07-10 | 中国电子科技集团公司第三十八研究所 | High-speed digital transmission system suitable for space active digital array |
| CN108981768A (en) * | 2018-09-05 | 2018-12-11 | 哈尔滨工业大学 | Single-ended fast distributed Brillouin Optical domain reflectometer based on optics chirp chain |
| CN111049582A (en) * | 2019-12-17 | 2020-04-21 | 北京无线电计量测试研究所 | Microwave signal real-time synchronization device and method based on microwave photon technology |
| CN111049582B (en) * | 2019-12-17 | 2021-12-14 | 北京无线电计量测试研究所 | Microwave signal real-time synchronization device and method based on microwave photon technology |
| WO2022037563A1 (en) * | 2020-08-21 | 2022-02-24 | 华为技术有限公司 | Light source, optical transmission method, and optical injection locking system |
| CN114337836A (en) * | 2021-11-30 | 2022-04-12 | 电子科技大学 | MZM-based optical frequency comb generation system and application thereof in WDM |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103780311A (en) | Light-source management method supporting WDM grid frequency standard of coherent light network | |
| KR100875922B1 (en) | Downlink optical transmitter and method using wavelength independent light source in WDM passive optical subscriber network, and optical line termination system using the same | |
| KR100921797B1 (en) | Wavelength Division Multiplexing - Passive Optical Network system | |
| Rohde et al. | Next generation optical access: 1 Gbit/s for everyone | |
| US9252840B2 (en) | Optical signal processing apparatus, transmission apparatus, and optical signal processing method | |
| US11451318B2 (en) | Optical line terminal and optical fiber access system with increased flexibility | |
| US10897310B2 (en) | Optical line terminal and method for transmitting digital information | |
| TW201407980A (en) | Optical transmitter | |
| US20200401013A1 (en) | Multiple kerr-frequency-comb generation using different lines from a remote kerr comb | |
| Mohamed et al. | Options and challenges in next-generation optical access networks (NG-OANs) | |
| Luo et al. | Next generation passive optical network offering 40Gb/s or more bandwidth | |
| CN104409956B (en) | More microwave local oscillation source generating devices based on injection locking quantum dot mode-locked laser | |
| US7936994B2 (en) | Broadband light source using fabry perot laser diodes | |
| RU2407169C1 (en) | Device and method for optical line terminal (olt) and optical network unit (onu) in wavelength-independent wavelength division multiplex passive optical networks | |
| Spolitis et al. | Optimal design of spectrally sliced ASE seeded WDM-PON system | |
| JP2017062473A (en) | Harmonic generation and phase sensitive amplification using Bragg reflection waveguide | |
| Vall-llosera et al. | COCONUT cost, power consumption and migration analysis: A route towards NG-PON3 | |
| CN107664792B (en) | Optical signal generator, optical line terminal and method for generating optical signal | |
| Berrettini et al. | Colorless WDM-PON architecture for Rayleigh backscattering and path-loss degradation mitigation | |
| Aldaya et al. | Simultaneous generation of wavelength division multiplexing PON and RoF signals using a hybrid mode-locked laser | |
| Gebrewold | Reflective semiconductor optical amplifiers (RSOAs) as colorless sources in access networks | |
| Debrégeas et al. | Components for high speed 5G access | |
| JP2010010986A (en) | Optical transmission system using four-wave mixing | |
| KR100990264B1 (en) | Light source apparatus and optical communication system including ring resonator | |
| US11855694B1 (en) | Systems and methods for full field transception |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140507 |
|
| RJ01 | Rejection of invention patent application after publication |