CN107154822B - Suppression device for multi-stage SOA nonlinear effect - Google Patents
Suppression device for multi-stage SOA nonlinear effect Download PDFInfo
- Publication number
- CN107154822B CN107154822B CN201710466533.2A CN201710466533A CN107154822B CN 107154822 B CN107154822 B CN 107154822B CN 201710466533 A CN201710466533 A CN 201710466533A CN 107154822 B CN107154822 B CN 107154822B
- Authority
- CN
- China
- Prior art keywords
- output
- soa
- input
- filter
- stage
- 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.)
- Active
Links
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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2543—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to fibre non-linearities, e.g. Kerr effect
-
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
-
- 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
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Nonlinear Science (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to a nonlinear effect suppression device, belongs to the field of optical communication, and particularly relates to a multistage SOA nonlinear effect suppression device. Including following the light path and setting gradually: the device comprises an input coupler, an input filter, an input isolator, a semiconductor optical amplifier SOA, an output isolator, an output filter and an output coupler. The invention can realize the multi-stage cascade application based on the SOA, and can better inhibit the nonlinear influence of the front-stage SOA on the rear-stage SOA, thereby realizing the ultra-long distance transmission.
Description
Technical Field
The invention relates to a suppression device for a multilevel SOA nonlinear effect, belongs to the field of optical communication, and particularly relates to a suppression device for a multilevel SOA nonlinear effect.
background
As traffic demands continue to increase, bandwidth usage increases dramatically, and ultra-high bandwidth ethernet services 100GE are rapidly increasing. Meanwhile, with resource sharing of multiple users, long-distance transmission and multipoint sharing of 100GE high-speed ethernet are one of trends of 100GE ethernet services.
At present, the optical power of the 100GE ethernet signal transmitted by the CFP or CFP2 module is about 6dBm, and the sensitivity of the 100GE ethernet signal received by the CFP or CFP2 module is about 0dBm, so the cross-loss of high-speed ethernet service transmission can only be realized by 6dB, which is about 20 km. But current metropolitan networks typically range from about 80-120 km. Therefore, the requirement of practical application cannot be met by adopting direct interconnection. Since the wavelength range adopted by the 100GE high-speed service light is 1300nm, the traditional EDFA and RFA cannot amplify the wavelength range, the 1300nm wavelength band can be amplified by the semiconductor optical amplifier-based technology, but after the multi-stage cascade amplification, the ASE noise of the front-stage SOA has large influence on the saturated output optical power of the rear-stage SOA, and the good application cannot be realized.
Disclosure of Invention
The invention mainly solves the problem of nonlinear effect generated by SOA cascade connection during long-distance transmission of 100GE Ethernet signals, and provides a device for inhibiting the nonlinear effect of a multistage SOA.
The technical problem of the invention is mainly solved by the following technical scheme:
A suppression device for the nonlinear effect of a multi-stage SOA comprises an input coupler 1, an input filter 2, an input isolator 3, a semiconductor optical amplifier SOA4, an output isolator 5, an output filter 6 and an output coupler 7 which are sequentially arranged along an optical path; the split end of the input coupler 1 is connected with the input detection PIN8, and the split end of the output coupler enters the output detection PIN 9.
Preferably, in the device for suppressing the nonlinear effect of the multi-stage SOA, the splitting ratio of the splitting ends of the input coupler and the output coupler is 1% to 5%.
Preferably, in the apparatus for suppressing the nonlinear effect of the multi-stage SOA, the input filter is a comb filter.
Preferably, in the apparatus for suppressing the nonlinear effect of the multi-stage SOA, the output filter is a band-pass filter.
Preferably, in the device for suppressing the nonlinear effect of the multi-stage SOA, the input isolator and the output isolator adopt bipolar isolators, and the isolation value is greater than 45 dB.
Preferably, in the apparatus for suppressing the nonlinear effect of the multi-stage SOA, the insertion loss of the service signal light passing through the input filter and the output filter is less than 0.5 dB.
Preferably, in the device for suppressing the nonlinear effect of the multi-stage SOA, the insertion loss of the service signal light passing through the bipolar isolator is less than 0.5 dB.
Therefore, the invention has the following advantages: the multi-stage cascade application based on the SOA can be realized, the nonlinear influence of the front-stage SOA on the rear-stage SOA can be well inhibited, and the ultra-long distance transmission is realized.
Drawings
FIG. 1 is a diagram of a suppression device for multi-level SOA nonlinear effects;
Fig. 2 is a diagram of a conventional cascade amplification system for realizing long-distance transmission;
FIG. 3 is a diagram of a cascade amplification system employing the apparatus of the present invention;
Fig. 4 is a schematic diagram comparing the effect of the present invention with the prior art.
In the figure, 1, an input coupler; 2. an input filter; 3. an input isolator; 4. a semiconductor optical amplifier SOA; 5. an output isolator; 6. an output filter; 7. an output coupler; 8. inputting a detection PIN; 9. outputting a detection PIN; 10. an Ethernet service transmitter; 11. a first transmission link; 12. a first stage SOA optical amplifier; 13. a second transmission link; 14. a second stage SOA optical amplifier; 15. a third transmission link; 16. a third stage SOA optical amplifier; 17. a fourth transmission link; 18. an Ethernet service receiver; 9. a first-stage cascaded SOA optical amplifier; 20. a second-stage cascaded SOA optical amplifier; 21. a third-stage cascaded SOA optical amplifier; 1a, an input end of an input coupler; 1b, inputting the output end of the coupler; 1c, a light splitting end of the input coupler; 2a, an input end of an input filter; 2b, inputting the output end of the filter; 3a, inputting the input end of the isolator; 3b, inputting the output end of the isolator; 4a, an SOA input end of the semiconductor optical amplifier; 4b, an SOA output end of the semiconductor optical amplifier; 5a, an input end of an output isolator; 5b, an output end of the output isolator; 6a, an input end of an output filter; 6b, an output end of the output filter; 7a, an input of the output coupler; 7b, an output end of the output coupler; 7c, the splitting end of the output coupler.
Detailed Description
the technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
example (b):
Fig. 1 shows a diagram of a suppression device for multi-stage SOA nonlinear effects, which includes, arranged along an optical path in sequence: the device comprises an input coupler (1), an input filter (2), an input isolator (3), a semiconductor optical amplifier SOA (4), an output isolator (5), an output filter (6) and an output coupler (7). The light splitting end of the input coupler is connected with an input detection PIN (8), and the output end of the input coupler is connected with the input end of the input filter; the output end of the input filter is connected with the input end of the input isolator; the output end of the input isolator is connected with the input end of the SOA; the output end of the SOA is connected with the input end of the output isolator; the output end of the output isolator is connected with the input end of the output filter; the output end of the output filter is connected with the input end of the output coupler; the split end of the output coupler enters the output detection PIN (9).
In a conventional optical amplifier cascade system (such as EDFA and RFA amplifier cascade system), the optical amplifier has an isolator but no filter, so that when the system is used in the SOA class system field, the isolator is usually thought to be used, but the filter is not easily thought to be used, which is the initiative of the embodiment.
In a conventional cascade system, a filter is generally used in a system receiver to reduce out-of-band noise entering the receiver and affecting the receiving performance. The optical path structure in which the input and output terminals of the SOA optical amplifier in the line use filters is not conceivable.
The isolators are independently arranged at the output end and the output end of the SOA optical amplifier, so that ASE noise opposite to service light can be effectively isolated, and the saturation output optical power of the SOA can be effectively improved. The adoption of the isolator optical path structure to improve the saturation output optical power of the SOA is the first initiative of the embodiment.
Filters are independently arranged at the input end and the output end of the SOA optical amplifier, out-of-band ASE noise can be effectively filtered, and the saturation output optical power of the SOA can be effectively improved. The idea of using the filter optical path structure to improve the saturation output optical power of the SOA is an unconventional practice and is not easy to think.
The isolator and the filter are respectively arranged at the input end and the output end of the SOA optical amplifier, so that the saturation output optical power of the SOA can be greatly improved, and the output optical power of each stage of SOA can be ensured to have a larger value. The technical scheme is obviously superior to the effect of improving the saturated output optical power by independently adopting an isolator or a filter.
Fig. 2 shows a diagram of a conventional cascade amplification system for realizing long-distance transmission. The Ethernet service transmitter (10) outputs Ethernet service signal light, and the Ethernet service signal light sequentially passes through a first-stage transmission link (11), a first-stage SOA optical amplifier (12), a second-stage transmission link (13), a second-stage SOA optical amplifier (14), a third-stage transmission link (15), a third-stage SOA optical amplifier (16) and a fourth-stage transmission link (17) and finally enters an Ethernet service receiver (18). The service optical performance of the receiver is poor, and error codes are easy to occur.
Fig. 3 shows a diagram of a cascade amplification system employing the apparatus of the present invention. The Ethernet service transmitter (10) outputs Ethernet service signal light, and the Ethernet service signal light sequentially passes through the first-stage transmission link (11), the first-stage cascade SOA optical amplifier (19), the second-stage transmission link (13), the second-stage cascade SOA optical amplifier (20), the third-stage transmission link (15), the third-stage cascade SOA optical amplifier (21) and the fourth-stage transmission link (17) and finally enters the Ethernet service receiver (18). The semiconductor optical amplifier of the scheme adopts the optical path structure of fig. 1, and can better inhibit the nonlinear effect, thereby realizing long-distance transmission.
The principle of the embodiment for suppressing the nonlinearity of the SOA cascade system will be described in detail below.
In a conventional cascade system of optical amplifiers (such as EDFA and RFA amplifier cascade systems), the optical power output by the optical amplifier has certain requirements (limited by the nonlinearity of the optical fiber), and therefore, as long as the output optical power Pout of each stage of the optical amplifier meets the requirements (i.e., the optical amplifier itself is not limited by the nonlinearity effect), the nonlinear effect of the entire cascade system certainly does not occur.
For the system application of the SOA cascade, the nonlinearity has two aspects, on one hand, the limitation of the output optical power Pout of each amplifier stage is realized; another is the limitation of the nonlinear effects of each optical amplifier itself. When the amplifier is applied in a system-level cascade mode, the output optical power Pout of the amplifier of each stage meets the index requirement. Meanwhile, the limitation of the nonlinear effect of each optical amplifier should be required, and an index of the optical amplifier, namely the saturated output optical power, must be larger than the limit value of the output optical power Pout. Once the output optical power is greater than the saturation output optical power value, the self-nonlinear effect of the optical amplifier occurs, and the system may generate bit errors.
saturated output optical power Psat of the optical amplifier:
Psat is proportional to the cross-sectional area a and the output coupling efficiency u; inversely proportional to the carrier lifetime T, the limiting factor T and the differential gain factor dg/dn. By adopting the optical path structures of the isolator and the filter at the input end and the output end of the SOA, the forward out-of-band ASE noise at the input end and the reverse out-of-band ASE noise at the output end can be well inhibited, so that the effective carrier density n is improved, the differential gain factor dg/dn can be reduced, and the effective saturated output optical power is finally improved. And the SOA of each stage is ensured to have larger effective output optical power which is not influenced by nonlinearity.
As shown in fig. 4. Under the condition that an input end and an output end of the SOA do not adopt an isolator and a filter, the saturation output optical power of each stage of SOA is reduced very fast, and in order to ensure that the system transmits without error, the output optical power of the following SOA is required to be lower than that of the stage of SOA, so that the transmission distance is limited. After the input end and the output end of the SOA adopt the isolator and the filter, the saturation output optical power of each stage of SOA is reduced, so that the output of the subsequent stage of SOA keeps higher optical power, and long-distance transmission can be realized.
the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. The device for suppressing the nonlinear effect of the multi-stage SOA is characterized by comprising an input coupler (1), an input filter (2), an input isolator (3), a semiconductor optical amplifier SOA (4), an output isolator (5), an output filter (6) and an output coupler (7) which are sequentially arranged along an optical path; the light splitting end of the input coupler (1) is connected with an input detection PIN (8), and the light splitting end of the output coupler enters an output detection PIN (9); the Ethernet service signal light is output by an Ethernet service transmitter (10) in a cascade amplification system where the suppression device is located, sequentially passes through a first-stage transmission link (11), a first-stage cascade SOA optical amplifier (19), a second-stage transmission link (13) and a second-stage cascade SOA optical amplifier (20), and then enters an Ethernet receiver;
The SOA comprises an input end, an output end and an output end, wherein an optical path structure of an isolator and a filter is adopted at the input end and the output end of the SOA and is used for inhibiting forward out-of-band ASE noise at the input end and reverse out-of-band ASE noise at the output end so as to improve the effective carrier density n.
2. The device for suppressing nonlinear effects of a multistage SOA as claimed in claim 1, wherein the splitting ratio of the splitting ends of the input coupler and the output coupler is 1% to 5%.
3. The apparatus of claim 1, wherein the input filter is a comb filter.
4. The apparatus for suppressing nonlinear effects in a multistage SOA as claimed in claim 1, wherein the output filter is a band pass filter.
5. The device for suppressing the nonlinear effect of a multistage SOA as claimed in claim 1, wherein the input isolator and the output isolator adopt bipolar isolators, and the isolation value is greater than 45 dB.
6. the apparatus of claim 1, wherein the insertion loss of the service signal light passing through the input filter and the output filter is less than 0.5 dB.
7. The apparatus of claim 1, wherein the insertion loss of the service signal light through the bipolar isolator is less than 0.5 dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710466533.2A CN107154822B (en) | 2017-06-20 | 2017-06-20 | Suppression device for multi-stage SOA nonlinear effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710466533.2A CN107154822B (en) | 2017-06-20 | 2017-06-20 | Suppression device for multi-stage SOA nonlinear effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107154822A CN107154822A (en) | 2017-09-12 |
| CN107154822B true CN107154822B (en) | 2019-12-10 |
Family
ID=59796730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710466533.2A Active CN107154822B (en) | 2017-06-20 | 2017-06-20 | Suppression device for multi-stage SOA nonlinear effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107154822B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990813B (en) * | 2019-03-19 | 2021-09-07 | 北京航天时代光电科技有限公司 | Fiber grating wavelength demodulating equipment based on broadband tunable light source |
| CN110456589A (en) * | 2019-09-12 | 2019-11-15 | 无锡市德科立光电子技术有限公司 | A kind of light channel structure of semiconductor light fiber amplifier |
| CN113036591B (en) * | 2021-03-04 | 2022-04-01 | 无锡市德科立光电子技术股份有限公司 | Spectrum shaping method for ultra-long distance optical communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063731A (en) * | 2006-04-30 | 2007-10-31 | 深圳大学 | Distributed feedback inhibition semiconductor optical amplifier |
| CN101997612A (en) * | 2009-08-10 | 2011-03-30 | 华为技术有限公司 | Optical amplification device and optical repeater |
| CN106226972A (en) * | 2016-08-31 | 2016-12-14 | 武汉光迅科技股份有限公司 | A kind of semiconductor optical amplifier operation control method and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070258722A1 (en) * | 2006-05-08 | 2007-11-08 | Jin Yu | Optical receiver |
| CN101546886A (en) * | 2009-02-03 | 2009-09-30 | 江西师范大学 | A 8-shaped multi-wavelength optical fibre laser |
| JP2013197200A (en) * | 2012-03-16 | 2013-09-30 | Sumitomo Electric Device Innovations Inc | Photoreceiver control method and communication control method |
-
2017
- 2017-06-20 CN CN201710466533.2A patent/CN107154822B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063731A (en) * | 2006-04-30 | 2007-10-31 | 深圳大学 | Distributed feedback inhibition semiconductor optical amplifier |
| CN101997612A (en) * | 2009-08-10 | 2011-03-30 | 华为技术有限公司 | Optical amplification device and optical repeater |
| CN106226972A (en) * | 2016-08-31 | 2016-12-14 | 武汉光迅科技股份有限公司 | A kind of semiconductor optical amplifier operation control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107154822A (en) | 2017-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6577439B2 (en) | Optical amplifier | |
| CN111698033B (en) | Hybrid optical fiber amplifier, optical signal amplification method, and optical communication system | |
| CN107154822B (en) | Suppression device for multi-stage SOA nonlinear effect | |
| US10476587B2 (en) | System and method for enhancing reliability in a transport network | |
| US11245242B2 (en) | L-band optical fiber amplifier with pumping balance | |
| CN112953640B (en) | Cascade remote pump amplification system, remote gain unit and signal light amplification method | |
| CN109510665A (en) | A kind of adjustable delay combination optical transmission system of ultra wide band | |
| CN101494499A (en) | Erbium-doped fiber amplifier of fiber-optical cable television network | |
| US6621622B2 (en) | Optical amplifier and optical amplifier arrangement with reduced cross phase modulation | |
| CN108535933A (en) | A kind of all-optical logic gate based on Coupled Chaotic semiconductor laser | |
| US6952308B2 (en) | Multi-stage bidirectional optical amplifier | |
| CN112366501A (en) | Erbium-doped optical fiber amplifier with wide gain adjustable range | |
| CN109327261B (en) | Light path structure of optical repeater | |
| CN112887029A (en) | Optical amplifier, optical signal processing method, and storage medium | |
| CN203661069U (en) | A gain spectrum flattening Raman optical fiber amplifier based on tellurite-based optical fibers | |
| CN203691408U (en) | Low-noise optical amplifier | |
| US8989585B2 (en) | Free space optical communications link node, network and method of transmitting traffic | |
| US6504647B1 (en) | Optical fiber amplifier, a method of amplifying optical signals, optical communications system | |
| CN107171729B (en) | Relay-free transmission system with composite common pump source | |
| Kannan et al. | Unrepeatered bidirectional transmission system over a single fiber using optical fiber amplifiers | |
| CN221283194U (en) | Erbium-doped fiber amplifier supporting LP-band | |
| WO2023217131A1 (en) | Optical amplifier, optical amplification method, and fiber-optic communication system | |
| CN114243437B (en) | PON system based on centralized Raman fiber amplifier and optical amplification method | |
| CN103716093A (en) | Gain spectrum flat Raman fiber amplifier based on tellurium-based optical fibers | |
| Zhao et al. | Chromatic dispersion compensation using full optical-field maximum likelihood sequence estimation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |