CN108377168A - A kind of optical sender - Google Patents
A kind of optical sender Download PDFInfo
- Publication number
- CN108377168A CN108377168A CN201810003029.3A CN201810003029A CN108377168A CN 108377168 A CN108377168 A CN 108377168A CN 201810003029 A CN201810003029 A CN 201810003029A CN 108377168 A CN108377168 A CN 108377168A
- Authority
- CN
- China
- Prior art keywords
- circuit
- splitter
- order distortion
- distributed feedback
- feedback laser
- 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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Classifications
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5059—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input
- H04B10/50593—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input to control the modulating signal amplitude including amplitude distortion
-
- 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
- H04B10/50—Transmitters
- H04B10/58—Compensation for non-linear transmitter output
- H04B10/588—Compensation for non-linear transmitter output in external modulation systems
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of optical senders, belong to photoelectric field, optical sender provided by the invention includes adjusting attenuator circuit, the Distributed Feedback Laser for connecting light signal output end, predistortion circuit and control module for connecting the electricity of RF signal input end, the electricity adjusts attenuator circuit to pass sequentially through radio frequency amplifier, the first splitter, delay circuit, the second splitter connection Distributed Feedback Laser, the predistortion circuit connects the first splitter and the second splitter, and the control module connection electricity adjusts attenuator circuit, Distributed Feedback Laser and predistortion circuit.
Description
【Technical field】
The present invention relates to a kind of optical senders.
【Background technology】
Compared with using the 1550nm optical senders of external modulation pattern, the price of the straight mode optical senders of 1550nm is opposite
It is cheap very much；Compared with 1310nm optical senders, the straight mode optical senders of 1550nm can be by cascading 1550nm image intensifers
Drive more users；Due to having above 2 remarkable advantages, the straight mode optical senders of 1550nm will be in cable television operators
It is largely selected when building FTTH networks.
Because being influenced by fiber dispersion effects, when the optical signal of 1550nm wavelength transmits in optical cable, distortion will produce；
And this distortion can be constantly serious with the extension of distance.The optical signal caused by fiber dispersion effects is distorted, wired
Final presentation in the optical link of television system is that the nonlinear indicator (special C/CSO indexs) of optical link can serious deterioration.
In order to solve this problem, the modulation system for needing change optical signal under normal conditions, by simply directly modulating
Pattern is changed to the external modulation pattern using expensive LiNbO3 external modulators composition, and coordinates SBS suppression circuits, so as to energy
Improve the nonlinear indicator of long range optical link.But using the 1550nm optical senders of external modulation pattern as a result of
LiNbO3 external modulators, and SBS suppression circuits are increased, cause price of complete machine expensive, it can not be by the big rule of cable television operators
Mould is disposed.
Since the optical modulations of the straight mode optical senders of 1550nm are direct amplitude-modulating modulation；So, by laser chirp
Effect causes second-order distortion to be inevitable, and finally also results in the serious deterioration of the C/CSO of optical link.Traditional solution party
Case is that 1310nm optical senders is selected to substitute the straight mode optical senders of 1550nm.1310nm optical senders not only Output optical power
It is low, and 1310nm wavelength is the zero dispersion window of G652 optical fiber.
【Invention content】
The technical problem to be solved by the present invention is to provide a kind of optical senders, improve optical link nonlinear indicator.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of optical sender includes adjusting attenuator circuit, for connecting optical signal for connecting the electricity of RF signal input end
Distributed Feedback Laser, predistortion circuit and the control module of output end, the electricity adjust attenuator circuit to pass sequentially through radio frequency amplifier, the
One splitter, delay circuit, the second splitter connect Distributed Feedback Laser, and the predistortion circuit connects the first splitter and second
Splitter, the control module connection electricity adjust attenuator circuit, Distributed Feedback Laser and predistortion circuit.
Further, the predistortion circuit includes the first second-order distortion compensation circuit and the second second-order distortion compensation electricity
Road, third splitter and the 4th splitter, the first splitter by third splitter connect the first second-order distortion compensation circuit and
Second second-order distortion compensation circuit, the first second-order distortion compensation circuit and the second second-order distortion compensation circuit pass through the 4th point
Road device connects the second splitter, and the first second-order distortion compensation circuit connects the control with the second second-order distortion compensation circuit
Module.
Further, the control module includes microcomputer control circuit, connects the panel button of microcomputer control circuit,
The microcomputer control circuit connection electricity adjusts attenuator circuit, Distributed Feedback Laser and predistortion circuit.
Further, it is connected with LCD display on the microcomputer control circuit.
Further, it is connected with network management interface on the microcomputer control circuit.
Beneficial effects of the present invention：
By the chirp of laser cause second-order distortion and by fiber dispersion effects cause second-order distortion will influence by
The link non-linear index of the On Structure of High Speed Sonar Signal of the straight mode optical sender compositions of 1550nm.In order to improve by
The nonlinear indicator of the optical link of the straight mode optical sender compositions of 1550nm extends the transmission range of optical signal, light hair of the present invention
The novel pre-distortion technology for penetrating machine, the second-order distortion for reducing the straight mode optical senders of 1550nm, being finally reached improves light chain
The purpose of road nonlinear indicator.And compared with using external modulation technology, the straight mode light emittings of 1550nm are solved using the present invention
The non-linear predistortion problem of machine, it is not only of low cost, but also energy conservation and environmental protection.
These features and advantages of the present invention will the detailed exposure in following specific implementation mode, attached drawing.
【Description of the drawings】
Following further describes the present invention with reference to the drawings：
Fig. 1 is the structural diagram of the present invention.
【Specific implementation mode】
The technical solution of the embodiment of the present invention is explained and illustrated with reference to the attached drawing of the embodiment of the present invention, but under
It is only the preferred embodiment of the present invention to state embodiment, and not all.Based on the implementation example in the implementation mode, people in the art
Member's obtained other embodiments without making creative work, belong to protection scope of the present invention.
With reference to figure 1, a kind of optical sender, include adjusting attenuator circuit 1 for connecting the electricity of RF signal input end, being used for
Distributed Feedback Laser 7, predistortion circuit 8 and the control module of light signal output end are connected, electricity adjusts attenuator circuit 1 to pass sequentially through radio frequency
Amplifier 2, the first splitter 3, delay circuit 4, the second splitter 5 connect Distributed Feedback Laser 7, and predistortion circuit 8 connects first point
Road device 3 and the second splitter 5, control module connection electricity adjust attenuator circuit 1, Distributed Feedback Laser 7 and predistortion circuit 8.Wherein electricity is adjusted
Attenuator circuit 1 is used to adjust the level value of the radiofrequency signal of input " radio frequency amplification " circuit, and radio frequency amplifier 2 is for amplifying radio frequency
Signal, to ensure that the radiofrequency signal for being loaded into " Distributed Feedback Laser 7 " reaches optimum value, predistortion circuit 8 is for compensating second-order distortion
Index.If the radiofrequency signal for being loaded into " Distributed Feedback Laser 7 " is too low, the carrier-to-noise ratio index of complete machine can be influenced；If be loaded into
The radiofrequency signal of " Distributed Feedback Laser 7 " is too high, and " Distributed Feedback Laser 7 " can be caused to generate clipping distortion.Control module is each for controlling
The working status parameter of equipment.The circuit can be according to the working status parameter pre-seted, the fortune of real-time and precise control device
Row state, and when equipment breaks down, realize auto-alarming.
Predistortion circuit 8 includes the first second-order distortion compensation circuit 81 and the second second-order distortion compensation circuit in the present invention
82, third splitter 83 and the 4th splitter 84, the first splitter 3 connect the first second-order distortion by third splitter 83 and compensate
Circuit 81 and the second second-order distortion compensation circuit 82, the first second-order distortion compensation circuit 81 and the second second-order distortion compensation circuit 82
The second splitter 5, the first second-order distortion compensation circuit 81 and the compensation of the second second-order distortion are connected by the 4th splitter 84
Circuit 82 connects the control module.First second-order distortion compensation circuit 81 causes two for compensating by the chirp of laser
Rank is distorted index, and the second second-order distortion compensation circuit 82 causes second-order distortion index for compensating by fiber dispersion effects.Control
Module is accurately controlled compensation rate according to the data of acquisition；And live tune can be carried out according to actual fibre circuit topological structure
System.
Include microcomputer control circuit 91 using control module, connect the panel button 93 of microcomputer control circuit 91, it is micro-
Computer-controlled circuit 91 connects electricity and adjusts attenuator circuit 1, Distributed Feedback Laser 7 and predistortion circuit 8.Microcomputer control circuit 91 is used for
Data acquisition and processing (DAP), working status parameter of the panel button 93 for scene adjustment and setting equipment.
LCD display 92 is connected on microcomputer control circuit 91.LCD display 92 is used for the work of real-time display equipment
Make state parameter.
Network management interface 94 is connected on microcomputer control circuit 91, remote network management of the network management interface 94 for equipment monitors.
By above-described embodiment, the purpose of the present invention is completely and effectively reached.One of ordinary skilled in the art
It should be understood that the present invention including but not limited to attached drawing and the above content described in specific implementation mode.It is any without departing from the present invention
The modification of function and structure principle be intended to be included in the range of claims.
Claims (5)
1. a kind of optical sender, it is characterised in that：Include adjusting attenuator circuit, for connecting for connecting the electricity of RF signal input end
Distributed Feedback Laser, predistortion circuit and the control module of light signal output end are connect, the electricity tune attenuator circuit passes sequentially through radio frequency and puts
Big device, the first splitter, delay circuit, the second splitter connect Distributed Feedback Laser, and the predistortion circuit connects the first splitter
With the second splitter, the control module connection electricity adjusts attenuator circuit, Distributed Feedback Laser and predistortion circuit.
2. optical sender as described in claim 1, it is characterised in that：The predistortion circuit is compensated including the first second-order distortion
Circuit and the second second-order distortion compensation circuit, third splitter and the 4th splitter, the first splitter are connected by third splitter
Connect the first second-order distortion compensation circuit and the second second-order distortion compensation circuit, the first second-order distortion compensation circuit and the two or two
Rank Distoriton compensating circuit connects the second splitter, the first second-order distortion compensation circuit and the second second order by the 4th splitter
Distoriton compensating circuit connects the control module.
3. optical sender as claimed in claim 1 or 2, it is characterised in that：The control module include microcomputer control circuit,
Connect the panel button of microcomputer control circuit, microcomputer control circuit connection electricity adjusts attenuator circuit, Distributed Feedback Laser and pre-
Distortion circuit.
4. optical sender as claimed in claim 3, it is characterised in that：LCD is connected on the microcomputer control circuit to show
Device.
5. optical sender as claimed in claim 3, it is characterised in that：Webmaster is connected on the microcomputer control circuit to connect
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810003029.3A CN108377168A (en) | 2018-01-02 | 2018-01-02 | A kind of optical sender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810003029.3A CN108377168A (en) | 2018-01-02 | 2018-01-02 | A kind of optical sender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108377168A true CN108377168A (en) | 2018-08-07 |
Family
ID=63015469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810003029.3A Pending CN108377168A (en) | 2018-01-02 | 2018-01-02 | A kind of optical sender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108377168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978330A (en) * | 2022-05-12 | 2022-08-30 | 北京浦丹光电股份有限公司 | Feedforward post-compensation linearization radio frequency optical transmitter and improvement method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2768325Y (en) * | 2005-01-17 | 2006-03-29 | 林锦芳 | Pre-distortion optical transmitter |
| CN201294328Y (en) * | 2008-11-11 | 2009-08-19 | 无锡雷华网络技术有限公司 | Predistortion correction circuit for laser |
| CN101986577A (en) * | 2010-09-15 | 2011-03-16 | 江苏烨鑫电子有限公司 | Optical fiber transmitter |
| CN203071942U (en) * | 2013-01-11 | 2013-07-17 | 四川九州电子科技股份有限公司 | Light transmitter and pre-distortion circuit thereof |
| CN203801012U (en) * | 2014-03-31 | 2014-08-27 | 杭州西子光电网络有限公司 | Photoemissive transmitter for cable television system |
| CN204316506U (en) * | 2015-01-28 | 2015-05-06 | 宁波环球广电科技有限公司 | Optical sender Distoriton compensating circuit |
| WO2016060750A1 (en) * | 2014-10-13 | 2016-04-21 | Nec Laboratories America, Inc. | Joint transmitter and receiver map algorithm for enhancing filtering tolerance in a bandwidth-limited system |
-
2018
- 2018-01-02 CN CN201810003029.3A patent/CN108377168A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2768325Y (en) * | 2005-01-17 | 2006-03-29 | 林锦芳 | Pre-distortion optical transmitter |
| CN201294328Y (en) * | 2008-11-11 | 2009-08-19 | 无锡雷华网络技术有限公司 | Predistortion correction circuit for laser |
| CN101986577A (en) * | 2010-09-15 | 2011-03-16 | 江苏烨鑫电子有限公司 | Optical fiber transmitter |
| CN203071942U (en) * | 2013-01-11 | 2013-07-17 | 四川九州电子科技股份有限公司 | Light transmitter and pre-distortion circuit thereof |
| CN203801012U (en) * | 2014-03-31 | 2014-08-27 | 杭州西子光电网络有限公司 | Photoemissive transmitter for cable television system |
| WO2016060750A1 (en) * | 2014-10-13 | 2016-04-21 | Nec Laboratories America, Inc. | Joint transmitter and receiver map algorithm for enhancing filtering tolerance in a bandwidth-limited system |
| CN204316506U (en) * | 2015-01-28 | 2015-05-06 | 宁波环球广电科技有限公司 | Optical sender Distoriton compensating circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978330A (en) * | 2022-05-12 | 2022-08-30 | 北京浦丹光电股份有限公司 | Feedforward post-compensation linearization radio frequency optical transmitter and improvement method thereof |
| CN114978330B (en) * | 2022-05-12 | 2024-01-23 | 北京浦丹光电股份有限公司 | Feedforward post-compensation linearization radio frequency optical transmitter and improvement method thereof |
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Application publication date: 20180807 |