CN113820691A - High-precision optical delay phase regulation and control method with optical amplification - Google Patents
High-precision optical delay phase regulation and control method with optical amplification Download PDFInfo
- Publication number
- CN113820691A CN113820691A CN202110943103.1A CN202110943103A CN113820691A CN 113820691 A CN113820691 A CN 113820691A CN 202110943103 A CN202110943103 A CN 202110943103A CN 113820691 A CN113820691 A CN 113820691A
- Authority
- CN
- China
- Prior art keywords
- optical
- delay
- optical delay
- module
- temperature
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 137
- 230000003321 amplification Effects 0.000 title claims abstract description 26
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4818—Constructional features, e.g. arrangements of optical elements using optical fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10053—Phase control
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Lasers (AREA)
Abstract
The invention relates to a high-precision optical delay phase regulation method with optical amplification, which can obtain femtosecond high-precision optical delay, precise phase control and higher-power optical delay light output by controlling the temperature of an optical delay line and has the characteristics of miniaturization, integration, multifunctional integration and the like. The optical amplification module is used for amplifying the signal light; and the optical delay module is used for enabling the optical signal to obtain high-precision optical delay. According to the invention, through the integration of light amplification and light delay, the refractive index of an optical fiber is accurately regulated and controlled by adopting temperature detection and control, the femtosecond-magnitude light delay is obtained, and the phase is accurately controlled.
Description
Technical Field
The invention relates to a high-precision optical delay phase regulation and control method with optical amplification, relates to a phased array radar system, and belongs to the technical field of optical fiber laser transmission and amplification.
Background
An Optical Fiber Amplifier (OFA) is one of core devices of an optical communication system, and is mainly used in an optical Fiber communication line to realize signal amplification. Optical fiber delay lines (optical De l ay Li ne, ODL) are important applications of microwave photonic technology, and play an important role in the fields of radar systems, electronic countermeasure systems, and the like. The light-operated phased array radar applies an optical fiber transmission and amplification technology and a light real-time delay technology to the phased array, and the influence of transit time and aperture effect can be reduced by adopting a light real-time delay line on a sub-array, so that the problem of realizing broadband wide-angle scanning of the traditional phased array radar is solved. In the application of the traditional phase interferometer, signals received by different antennas are delayed by using an optical fiber delay line, so that the system can process each path of signal in a time-sharing manner, and the problems of large equipment quantity and complex system of the traditional phase interferometer can be effectively solved. Meanwhile, the optical fiber transmission and amplification link has the advantages of flexible distribution, light weight, small size, electromagnetic interference resistance and the like, and the optical fiber has large bandwidth and small attenuation and is convenient for the remote transmission of radar signals.
However, in order to extract the phase information of the signal accurately, the delay storage time needs to reach microsecond level, so the length of the optical fiber is required to be long, the loss is increased, and meanwhile, the phase of the signal light is easy to change under the influence of the environment, and further, an extra phase discrimination error which is very large and even exceeds one period is generated. Such errors change with the temperature change, and cannot be removed by correcting channel amplitude and phase errors, so a method for measuring the delay time of the optical fiber delay line in real time with high precision is required to obtain the precise delay time of the delay line at the moment, so as to correct the errors. In order to meet the requirement that the phase discrimination error of the traditional interferometer is lower than 30 degrees, the precision of the optical fiber delay time needs to reach more than picosecond level. For a system needing precise phase modulation, the length of the delay optical fiber is long, and the optical fiber amplifier and the optical delay line are integrated, so that the research for flexibly obtaining the optical delay with higher precision has very important value and significance.
SUMMARY OF THE PATENT FOR INVENTION
The invention provides a high-precision optical delay phase modulation method with optical amplification, the optical delay precision can reach femtosecond magnitude, and the phase modulation precision can reach 3.3 degrees. Not only is accurate phase modulation obtained, but also the problem that the process bottleneck can only achieve millimeter-level delay is fundamentally solved, and high-precision optical delay is obtained.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-precision optical delay phase regulation method with optical amplification comprises the following steps:
the optical amplification module is used for amplifying the signal light;
the optical delay module is used for enabling the optical signal to obtain optical delay; the optical delay module changes the refractive index of the optical fiber through temperature, and further changes the propagation speed of light in the optical fiber.
In a preferred embodiment: the optical amplification module comprises an optical fiber jumper, an optical isolator, an optical splitter, a photoelectric detector, a pumping laser, a wavelength division multiplexer, an erbium-doped optical fiber and a temperature detection and control module;
the wave input jumper is connected with the input optical splitter through the first isolator, and part of light enters the input detector through the optical splitter to monitor the input optical power; the 980 end of the wavelength division multiplexer is used for connecting a 980nm pump laser, and the 1550 end of the wavelength division multiplexer is connected with the signal end of the input optical splitter; the output end of the erbium-doped optical fiber is connected to the optical delay module 9 through the second isolator to regulate and control optical delay, and the signal light after delay regulation is output through the output optical splitter to perform output optical power detection and signal transmission and is finally output through the output jumper.
In a preferred embodiment: the optical delay module includes:
an optical delay line for obtaining an optical delay; the optical input end of the optical delay line is connected with the optical output end of the optical amplification module;
the temperature measuring and controlling module is used for detecting and controlling the temperature of the optical delay line; the temperature measurement and control module is in contact with the surface of the optical delay line, and the optical delay is adjusted and controlled by changing the refractive index of the optical fiber through measuring and controlling the temperature of the optical delay line.
In a preferred embodiment: the temperature measurement and control module includes:
the semiconductor refrigerator is used for controlling the temperature of the optical delay line;
thermistor for detecting temperature of optical delay line
Compared with the prior art, the invention has the beneficial effects that:
1. realizing high-precision optical delay: for a single-mode optical fiber, 1ps of optical delay corresponds to 0.2mm of optical path, the current process level is easy to realize the control of 5mm of optical delay precision, and the invention can realize fs-level optical delay control precision through temperature control design; meanwhile, the requirement of the batch consistency of the product optical delay on the process is reduced.
2. Accurate phase control is achieved: by adjusting the optical delay at fs level, the phase of the signal light (193THz) having the frequency of the C band can be accurately controlled within a variation range of about 3.3 °.
3. The optical delay module can continuously adjust optical delay, the delay adjustable range reaches 0-300 ps, and the optical delay module has the characteristics of small volume, low cost, high compatibility and the like.
4. An integrated optical fiber amplifier: the optical fiber amplifier is integrated in the high-precision optical delay module, so that the output optical power of the optical delay module is effectively improved, and the product has the characteristics of miniaturization, integration, multifunctional integration and the like.
Drawings
Fig. 1 is a schematic diagram of a preferred embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like, are used in a broad sense, and for example, "connected" may be a wall-mounted connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.
Referring to fig. 1, a high-precision optical delay phase modulation method with optical amplification according to the present invention includes: an optical amplification module and an optical delay module 9, the optical amplification module further comprising: the optical fiber amplifier comprises an input jumper 1, a first isolator 2, an input optical splitter 3, an input detector 4, a pump laser 5, a wavelength division multiplexer 6, an erbium-doped optical fiber 7, a second isolator 8, an output optical splitter 10, an output detector 11 and an output jumper 12.
The wave input jumper 1 is connected with an input optical splitter 3 through a first isolator 2, and part of light enters an input detector 4 through light splitting to monitor the input optical power. The 980 end of the wavelength division multiplexer 6 is used for connecting a 980nm pump laser 5, and the 1550 end is connected with the signal end of the input optical splitter 3. The output end of the erbium-doped fiber 7 is additionally provided with a second isolator 8 to filter redundant pump light, and then is connected with an optical delay module 9 to regulate and control optical delay, and the signal light after delay regulation is subjected to output optical power detection and signal transmission through an output optical splitter 10 and finally is output through the output jumper 12.
The specific explanation of the precise phase control by the high-precision optical delay module is as follows:
firstly, high-precision optical delay is obtained through an optical delay module: a section of optical fiber needing delay regulation and control is placed on the surface of the TEC, and the temperature is controlled by changing the current of the TEC (the precision can reach 0.1 ℃). The temperature change affects the refractive index of the fiber (temperature coefficient of refractive index of single-mode fiber is 0.8 x 10)-5/° c @1550nm), so changing the temperature can change the speed of propagation of light therethrough. As can be seen from the formula t ═ n × L)/c (where c is the speed of light in vacuum, L is the length of the retardation fiber, n is the refractive index of the fiber, and t is the optical retardation), the optical retardation is Δ t ═ Δ n × L)/c (Δ n is the amount of change in the refractive index of the fiber) for a constant length of the fiber. Accordingly, the optical retardation Δ t of 2.7 × l (fs) can reach femtosecond level when the temperature changes by 0.1 ℃. For example, when the length of the optical fiber is 1m and the temperature is changed by 1 ℃, the optical delay can reach 27 fs; when the length of the optical fiber is 1000m and the temperature is changed by 10 ℃, the optical delay can reach 270 ps. Therefore, the invention can provide an integrated high-precision continuous adjustable optical delay module with a delay range of 0-300 ps and a delay precision reaching fs magnitude.
Secondly, the phase is accurately controlled through high-precision optical time delay: in the fiber delay line, the relationship between the phase of the signal light and the delay time is t ═ Φ/2 π f (where t is the delay time of the fiber delay line, f is the frequency of the transmission signal, and Φ is the phase difference between the input and output signals). For 1m optical fiber, the temperature changes by 0.1 ℃, the delay time of the delay line is 2.7fs, and for an optical signal with the frequency of 193THz, the phase can be accurately controlled within 3.3 degrees, and nearly 10 times of the phase difference error is superior to the standard that the phase difference error of the traditional interferometer is lower than 30 degrees.
And for the longer-distance optical fiber delay line, the optical fiber amplifier is integrated in the high-precision optical delay module, so that the optical loss caused by time delay can be effectively made up, the output optical power of the optical delay module is improved, and the product has the characteristics of miniaturization, integration, multifunctional integration and the like.
In summary, the high-precision optical delay phase modulation method with optical amplification provided by the invention can accurately control the phase, obtain high-precision optical delay and high-power optical output. The method has important value not only for the phased array radar system, but also for other more optoelectronic systems.
The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and the actions infringe the protection scope of the present invention are included in the present invention.
Claims (4)
1. A high-precision optical delay phase modulation method with optical amplification is characterized by comprising the following steps:
the optical amplification module is used for amplifying the signal light;
the optical delay module is used for enabling the optical signal to obtain optical delay; the optical delay module changes the refractive index of the optical fiber through temperature, and further changes the propagation speed of light in the optical fiber.
2. The high-precision optical delay phase modulation method with optical amplification according to claim 1, wherein: the optical amplification module comprises an optical fiber jumper, an optical isolator, an optical splitter, a photoelectric detector, a pumping laser, a wavelength division multiplexer, an erbium-doped optical fiber and a temperature detection and control module;
the wave input jumper is connected with the input optical splitter through the first isolator, and part of light enters the input detector through the optical splitter to monitor the input optical power; the 980 end of the wavelength division multiplexer is used for connecting a 980nm pump laser, and the 1550 end of the wavelength division multiplexer is connected with the signal end of the input optical splitter; the output end of the erbium-doped optical fiber is connected to the optical delay module 9 through the second isolator to regulate and control optical delay, and the signal light after delay regulation is output through the output optical splitter to perform output optical power detection and signal transmission and is finally output through the output jumper.
3. The high-precision optical delay phase modulation method with optical amplification according to claim 1, wherein: the optical delay module includes:
an optical delay line for obtaining an optical delay; the optical input end of the optical delay line is connected with the optical output end of the optical amplification module;
the temperature measuring and controlling module is used for detecting and controlling the temperature of the optical delay line; the temperature measurement and control module is in contact with the surface of the optical delay line, and the optical delay is adjusted and controlled by changing the refractive index of the optical fiber through measuring and controlling the temperature of the optical delay line.
4. The high-precision optical delay phase modulation method with optical amplification according to claim 3, wherein: the temperature measurement and control module includes:
the semiconductor refrigerator is used for controlling the temperature of the optical delay line;
and the thermistor is used for detecting the temperature of the optical delay line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943103.1A CN113820691A (en) | 2021-08-17 | 2021-08-17 | High-precision optical delay phase regulation and control method with optical amplification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943103.1A CN113820691A (en) | 2021-08-17 | 2021-08-17 | High-precision optical delay phase regulation and control method with optical amplification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113820691A true CN113820691A (en) | 2021-12-21 |
Family
ID=78923035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110943103.1A Pending CN113820691A (en) | 2021-08-17 | 2021-08-17 | High-precision optical delay phase regulation and control method with optical amplification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113820691A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6476961B1 (en) * | 2001-04-26 | 2002-11-05 | Onetta, Inc. | Optical amplifier systems with transient control |
| CN101296037A (en) * | 2008-06-05 | 2008-10-29 | 上海交通大学 | Apparatus and method for light-operated controlling light delay line based on silicon based micro-ring |
| CN103900798A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Optical coherence domain polarization measurement device with optical distance scanning on-line correction function |
| CN204536592U (en) * | 2015-03-20 | 2015-08-05 | 孙磊 | One step-by-step movement temperature control type fibre delay line time delay |
| CN107966765A (en) * | 2017-12-21 | 2018-04-27 | 中国科学院上海光学精密机械研究所 | A wide range of continuously adjustable optical fiber delay line device |
| CN207691190U (en) * | 2017-12-22 | 2018-08-03 | 武汉孚晟科技有限公司 | A kind of fiber pulse amplifier based on pulse pump |
| CN210109535U (en) * | 2019-07-30 | 2020-02-21 | 贵州电网有限责任公司信息中心 | Low-power-consumption optical amplifier for miniaturized pump redundancy backup |
| CN211859141U (en) * | 2020-03-19 | 2020-11-03 | 廊坊市路环科技有限公司 | Ultra-narrow linewidth pulse modulation laser |
-
2021
- 2021-08-17 CN CN202110943103.1A patent/CN113820691A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6476961B1 (en) * | 2001-04-26 | 2002-11-05 | Onetta, Inc. | Optical amplifier systems with transient control |
| CN101296037A (en) * | 2008-06-05 | 2008-10-29 | 上海交通大学 | Apparatus and method for light-operated controlling light delay line based on silicon based micro-ring |
| CN103900798A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Optical coherence domain polarization measurement device with optical distance scanning on-line correction function |
| CN204536592U (en) * | 2015-03-20 | 2015-08-05 | 孙磊 | One step-by-step movement temperature control type fibre delay line time delay |
| CN107966765A (en) * | 2017-12-21 | 2018-04-27 | 中国科学院上海光学精密机械研究所 | A wide range of continuously adjustable optical fiber delay line device |
| CN207691190U (en) * | 2017-12-22 | 2018-08-03 | 武汉孚晟科技有限公司 | A kind of fiber pulse amplifier based on pulse pump |
| CN210109535U (en) * | 2019-07-30 | 2020-02-21 | 贵州电网有限责任公司信息中心 | Low-power-consumption optical amplifier for miniaturized pump redundancy backup |
| CN211859141U (en) * | 2020-03-19 | 2020-11-03 | 廊坊市路环科技有限公司 | Ultra-narrow linewidth pulse modulation laser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103501199B (en) | Phase place regulation device and method that radiofrequency signal stabilized fiber transmits mutually | |
| CN104242051B (en) | External cavity tunable laser and cavity mode locking method thereof | |
| CN102857300B (en) | The microwave fiber-optic link device of radar reference frequency signal long range propagation | |
| CN204089820U (en) | optical module performance parameter testing device | |
| CN105425033B (en) | Microwave photon frequency measuring system containing dual-ring coupling silicon-substrate photonic chip | |
| Liu et al. | Tuning optimization of ring resonator delays for integrated optical beam forming networks | |
| CN103490818B (en) | The compensator of propagation delay time and method during optical fiber time-frequency transmits | |
| CN102856778B (en) | Device and method capable of generating multi-bandwidth high-frequency tunable microwave signals | |
| CN108152582B (en) | Integrated optical waveguide microwave signal frequency measurement system and measurement method | |
| CN103929250A (en) | Optical fiber phase compensator and use method thereof | |
| CN107727365A (en) | A kind of system that optical waveguide loss is measured using reflectance spectrum fineness | |
| KR20140030868A (en) | Compact external cavity tunable laser apparatus | |
| Liu et al. | Low error and broadband microwave frequency measurement using a silicon Mach–Zehnder interferometer coupled ring array | |
| CN113820691A (en) | High-precision optical delay phase regulation and control method with optical amplification | |
| CN106200021A (en) | The tunable broadband of miniaturization steady phase fibre delay line | |
| CN204086537U (en) | A kind of photoswitch realizes the passive laser ranging system of optical fiber type of inside and outside optical path compensation | |
| CN212844018U (en) | Laser pulse autocorrelator | |
| CN110806573A (en) | Indoor distance measurement precision real-time measurement device for laser distance measuring machine | |
| CN103986056B (en) | A kind of based on the temperature controlled adjustable microwave signal generation device of TEC and method | |
| CN116482803A (en) | On-chip lithium metaniobate optical waveguide electric field sensor and measuring system thereof | |
| Ebenhag et al. | Fiber based one-way time transfer with enhanced accuracy | |
| CN209299268U (en) | A kind of integrated coherent receiver | |
| CN211670858U (en) | High-performance radio frequency optical transmission link structure | |
| CN204086538U (en) | A kind of dual laser realizes the passive type laser ranging system of optical path compensation | |
| Liu et al. | Silicon integrated low-loss 4-channel 5-bit optical true-time delay lines |
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 |