CN110113104A - A kind of method and device generating adjustable microwave signal based on single-mode dual-core optical fiber - Google Patents
A kind of method and device generating adjustable microwave signal based on single-mode dual-core optical fiber Download PDFInfo
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- CN110113104A CN110113104A CN201810100177.7A CN201810100177A CN110113104A CN 110113104 A CN110113104 A CN 110113104A CN 201810100177 A CN201810100177 A CN 201810100177A CN 110113104 A CN110113104 A CN 110113104A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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Abstract
The invention discloses a kind of method and devices that adjustable microwave signal is generated based on single-mode dual-core optical fiber, device includes narrow linewidth laser (1), first fiber coupler (2), optical circulator (3), bidirectional optical amplifier (4), fan-in are fanned out to device (5), single-mode dual-core optical fiber (6), temperature control equipment (7), the second fiber coupler (8), photodetector (9).The laser that narrow linewidth laser exports is divided into two bundles, it is a branch of to be used as Brillouin's pump light, another Shu Zuowei local oscillator light, Brillouin's pump light enters the first fibre core of single-mode dual-core optical fiber along optical path, and single order stokes light is generated wherein, single order stokes light enters the second fibre core of single-mode dual-core optical fiber along optical path, and second order of Stokes light is generated wherein, second order of Stokes light and local oscillator light are in photodetector generation beat frequency, the temperature control equipment of single-mode dual-core optical fiber is adjusted, adjustable microwave signal can be exported with beat frequency.
Description
Technical field
The present invention relates to multi-core optical fiber technology and microwave photon technology, specially a kind of generated using single-mode dual-core optical fiber can
Adjust the method and device of microwave signal.
Background technique
Microwave is a kind of important wireless transmission medium, in microwave communication, satellite communication, radar system, radio astronomy, micro-
Wave remote sensing and optical fiber radio communication etc. are all widely used in fields.The continuous expansion of application demand and with optical fiber technology and
The development of microwave technology, so that optical fiber photon technology gradually merges with microwave technology and develops a kind of new microwave photon technology
And become technical research hot spot.
To adapt to demand of the wireless light wave transmissions to high-speed data microwave carrier signals source, obtained there has been proposed various
The scheme that high-frequency microwave signal optics generates.The scheme of high-frequency microwave signal is generated using optical fiber stimulated Brillouin scattering, such as
CN101247181B generates the series connection of unit using multiple single order Stokes, can obtain multistage Brillouin's frequency microwave letter
Number generation.CN201210341950 is cascaded using multiple Brillouin shift units or annular Brillouin laser chamber, generates multifrequency
Band high-frequency microwave signal.The above-mentioned scheme that high-frequency microwave signal is generated using optical fiber stimulated Brillouin scattering effect, in multistage cloth
Deep gain media, is cascaded by the way of comparatively laborious, and system structure is complicated, and it is also inconvenient to adjust.
Summary of the invention
The present invention dexterously uses this special optical fiber of single mode homogeneity twin-core fiber as Brillouin scattering medium, using light
The second order of Stokes light of generation and local oscillator light are carried out beat frequency and obtain microwave signal by infradyne manner.Microwave proposed by the present invention
Signal generating method provides a kind of simple, compact, the at low cost all -fiber knot of structure with device for future microwave photonic system
Structure microwave source optics generates scheme.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of method and device that adjustable microwave signal is generated based on single-mode dual-core optical fiber proposed according to the present invention comprising narrow
Line width laser (1), the first fiber coupler (2), optical circulator (3), bidirectional optical amplifier (4), fan-in are fanned out to device (5),
Single-mode dual-core optical fiber (6), temperature control equipment (7), the second fiber coupler (8), photodetector (9).
The connection relationship of microwave signal generation device of the present invention is the laser output mouth and first of narrow linewidth laser (1)
The common end (21) of fiber coupler is connected, a port (22) of the first fiber coupler and the first end of optical circulator (3)
Mouth (31) is connected, and the another port (23) of the first fiber coupler is connected with a port (83) of the second fiber coupler, light
The second port (32) of circulator is connected with the input port of bidirectional optical amplifier (4), the output port of bidirectional optical amplifier with
The first single mode optical fiber (51) that fan-in is fanned out to the end A of device (5) is connected, and optical circulator third port (33) and fan-in are fanned out to device
(5) second single mode optical fiber (52) at the end A is connected, fan-in be fanned out to two fiber core with single-mold at the end device B respectively with twin-core fiber
Two fiber core with single-mold (61) are connected with (62), the 4th port (34) of circulator and a port (82) of the second fiber coupler
It is connected, the second fiber coupler common end (81) is connected to photodetector (9).
A kind of the step of method and device generating adjustable microwave signal based on single-mode dual-core optical fiber, generation adjustable microwave signal
Be: the output of narrow linewidth laser (1) is connected with the common end (21) of the first fiber coupler (2), the narrow linewidth after beam splitting
Laser is used as Brillouin's pump light and local oscillator light, Brillouin's pump from the port (22) of the first fiber coupler and (23) output respectively
Pu light enters image intensifer (3) through optical circulator first port (31) and amplifies, and is fanned out to device (5) one by fan-in after amplification
One single mode optical fiber (51) at end (A) is connected to the corresponding fiber core with single-mold in the end B (53), is then injected into single-mode dual-core optical fiber (6)
A fibre core (61) in, when Brillouin's pumping light power is amplified to sufficiently large, excited Brillouin will occur in fibre core 61
Scattering generates single order Storrs gram light；Single order stokes light, backwards to transmitting, is fanned out in the end device B along fibre core 61 by fan-in
After single mode single 53 is connected to the single mode optical fiber 51 in the end A, the second of optical circulator is first reached again after bidirectional optical amplifier is put
Port (32) enters the fiber core with single-mold at the end B through third port (33) by the single mode optical fiber (52) that fan-in is fanned out to the end device A again
(54) it after, is injected into another fibre core (62) of single-mode dual-core optical fiber, when the power of single order stoke light is enough,
Stimulated Brillouin scattering will occur in fibre core 62, generate second order of Stokes light；Second order of Stokes light along fibre core 62 backwards
Transmission, from optical circulator after the single mode optical fiber 52 that the fiber core with single-mold 54 in the end B that fan-in is fanned out to device is connected in the end A
4th port (34) is exported to a port (82) of the second fiber coupler (8), another port of the second fiber coupler
(83) the local oscillator light of a port (23) output of the first fiber coupler is accessed；Local oscillator light and second order of Stokes light are by the
Two fiber couplers close beam and export through public port (81), and on photodetector (9) beat frequency occurs for the conjunction beam of output, finally
It is the microwave signal of twice of Brillouin's frequency to frequency, adjusts the temperature control equipment (7) of control single-mode dual-core optical fiber, photoelectricity is visited
The microwave signal for surveying device output can be continuously adjusted.
It is optical fiber connector of the general single mode fiber to single-mode dual-core optical fiber, one end, the i.e. end A that the fan-in, which is fanned out to device,
It can connect two general single mode fibers, the other end, that is, end B, there are two fiber core with single-mold, can be respectively connected to single-mode dual-core light
Two fine fibre cores.Fan-in is fanned out to the core cross sections distribution and the core cross sections of core diameter size and twin-core fiber at the twin-core end of device
Distribution and the matching of core diameter size are consistent.
Two fibre cores of the single-mode dual-core optical fiber are homogeneity general single mode fiber core, and the two Brillouin shift value phase
Together, Brillouin shift temperature coefficient is identical.
Fig. 1 is a kind of apparatus structure schematic diagram that adjustable microwave signal is generated based on single-mode dual-core optical fiber.
Beneficial effects of the present invention and innovation: dexterously using one section of single-mode dual-core optical fiber as single order and second order by
Swash brillouin gain medium, obtain second order of Stokes light and local oscillator photo-beat frequency, twice of Brillouin is realized by all optical fibre structure
The optics of frequency microwave signal generates, and the tuning of microwave signal is realized by adjusting the temperature control equipment of single-mode dual-core optical fiber.
Installation cost of the present invention is low, and structure is simple, easy to accomplish, is convenient for the system integration.
Detailed description of the invention
Appended drawing reference in figure is explained are as follows: 1- narrow linewidth laser, the first fiber coupler of 2-, 3- optical circulator, 4- are bis-
To image intensifer, 5- fan-in is fanned out to device, 6- single-mode dual-core optical fiber, 7- temperature control equipment, the second fiber coupler of 8-, 9- light
Electric explorer, the first fiber coupler of 21- common end, 22- the first fiber coupler first port, the first fiber coupler of 23-
Second port, the first port of 31- optical circulator, the second port of 32- optical circulator, the third port of 33- optical circulator,
The 4th port of 34- optical circulator, 51- fan-in are fanned out to a single mode optical fiber at the end device A, and 52- fan-in is fanned out to the another of the end device A
Root single mode optical fiber, 53- fan-in are fanned out to a fiber core with single-mold at the end device B, and 54- fan-in is fanned out to another single mode fibre at the end device B
Core, a fibre core of 61- single-mode dual-core optical fiber, another fibre core of 62- single-mode dual-core optical fiber, the second fiber coupler of 81- are public
End altogether, 82- the second fiber coupler first port, the second port of the second fiber coupler of 83-.
Specific embodiment
The index path of device is connected as shown in Figure 1；
Specific steps are as follows: by common end (21) phase of the output of narrow linewidth laser (1) and the first fiber coupler (2)
Even, the narrow-linewidth laser after beam splitting is used as Brillouin from the port (22) of the first fiber coupler and (23) output respectively and pumps
Light and local oscillator light, Brillouin's pump light enter image intensifer (3) through optical circulator first port (31) and amplify, pass through after amplification
Cross fan-in and be fanned out to the single mode optical fiber (51) of device (5) one end (A) and be connected to the corresponding fiber core with single-mold in the end B (53), then by
It injects in a fibre core (61) of single-mode dual-core optical fiber (6), it, will be in fibre core when Brillouin's pumping light power is amplified to sufficiently large
Stimulated Brillouin scattering occurs in 61 and generates single order Storrs gram light；Single order stokes light, backwards to transmitting, passes through along fibre core 61
After the single mode single 53 that fan-in is fanned out in the end device B is connected to the single mode optical fiber 51 in the end A, first after bidirectional optical amplifier is put again
The second port (32) for reaching optical circulator, the single mode optical fiber (52) at the end device A is fanned out to through third port (33) by fan-in again
It into after the fiber core with single-mold (54) at the end B, is injected into another fibre core (62) of single-mode dual-core optical fiber, when this support of single order
When the power of gram light is enough, stimulated Brillouin scattering will occur in fibre core 62, generate second order of Stokes light；Second order stoke
For this light along fibre core 62 backwards to transmitting, the fiber core with single-mold 54 being fanned out in the end B of device by fan-in is connected to the single mode optical fiber in the end A
It is exported from the 4th port (34) of optical circulator to a port (82) of the second fiber coupler (8), the second optical fiber coupling after 52
The local oscillator light of a port (23) output of the first fiber coupler is accessed in another port (83) of clutch；Local oscillator light and second order
Stokes light closes beam by the second fiber coupler and is connected to photodetector by the second fiber coupler common end (81)
(9), beat frequency occurs on photodetector for two-beam, obtains the microwave signal that frequency is twice of Brillouin shift value, adjusts control
The microwave signal of the temperature control equipment (7) of single-mode dual-core optical fiber processed, photodetector output can be continuously adjusted, by photodetection
Device is connected to frequency spectrograph, can observe the frequency characteristic for generating adjustable microwave signal.
The narrow linewidth laser is C-band narrow linewidth semiconductor laser, line width 100kHz.
The bidirectional optical amplifier is high power light amplifier.
The optical circulator is that can bear powerful optical circulator.
The course of work of the invention is described in detail above, to those skilled in the art, foundation
Thought provided by the invention, in place of may having the change of unsubstantiality in the mode of specific implementation, as changed image intensifer
Position in type and optical path, the fibre core number for changing optical fiber and to single-mode dual-core optical fiber Brillouin frequency displacement adjusting method etc., this
Class change also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of method and device for generating adjustable microwave signal based on single-mode dual-core optical fiber, it is characterised in that the microwave signal produces
Raw device includes narrow linewidth laser (1), the first fiber coupler (2), optical circulator (3), bidirectional optical amplifier (4), fan
Enter to be fanned out to device (5), single-mode dual-core optical fiber (6), temperature control equipment (7), the second fiber coupler (8), photodetector
(9)。
2. a kind of method and device for generating adjustable microwave signal based on single-mode dual-core optical fiber, it is characterised in that the microwave signal produces
Generation method are as follows: the output of narrow linewidth laser (1) is connected with the common end (21) of the first fiber coupler (2), after beam splitting from
First port (22) and second port (23) output are used separately as Brillouin's pump light and local oscillator light, and Brillouin's pump light is through the ring of light
Shape device (3) first port (31), second port (32) enter bidirectional optical amplifier (4) afterwards and carry out power amplification, then pass through fan
The first single mode optical fiber (51) for entering to be fanned out to the end A of device (5) is finally infused into corresponding first fiber core with single-mold (53) in the end B
Enter in the first fibre core (61) of single-mode dual-core optical fiber (6), when Brillouin's pumping light power is more than Brillouin threshold or more, the
Stimulated Brillouin scattering occurs in one fibre core, generates single order stokes light；Single order stokes light is along the first fibre core backwards to biography
It is defeated, the second of optical circulator is reached after from the first fiber core with single-mold that fan-in is fanned out in the end device B to the first single mode optical fiber in the end A
Then port inputs bidirectional optical amplifier and carries out power amplification, the single order stokes light of amplification is through the second end of optical circulator
Mouthful and third port second single mode optical fiber (52) at the end device A is fanned out into after corresponding second fiber core with single-mold in the end B by fan-in, quilt
It is injected into the second fibre core (62) of single-mode dual-core optical fiber, and stimulated Brillouin scattering occurs in the second fibre core and generates this support of second order
Gram light；Second order of Stokes light transmits backwards along the second fibre core 62, the second single mode single 54 being fanned out in the end device B by fan-in
It is exported after to the second single mode optical fiber 52 in the end A from the 4th end (34) of optical circulator, then passes through the second optical fiber with local oscillator light
Coupler (8) carries out conjunction beam, and the light after closing beam carries out beat frequency at photodetector (9) and obtains high-frequency microwave signal, adjusts single
The continuously adjustable of output microwave signal may be implemented in the temperature control equipment (7) of mould twin-core fiber.
3. a kind of method and device for generating adjustable microwave signal based on single-mode dual-core optical fiber, it is characterised in that the microwave signal produces
It is single-mode dual-core optical fiber used in generation method and device, single-mode dual-core fiber core is in homogeneous material and the cloth of two fibre cores
Deep frequency shift value is consistent.
4. a kind of method and device for generating adjustable microwave signal based on single-mode dual-core optical fiber, it is characterised in that the microwave signal is complete
It is single-mode dual-core optical fiber structure that fan-in used in light production method and device, which is fanned out to device, and the end A that fan-in is fanned out to device is two
Root single mode optical fiber, the fibre core that fan-in is fanned out in the both ends B of device are fiber core with single-mold, the fibre core at the end B respectively with single-mode dual-core light
Fine fibre core matches.
5. a kind of method and device for generating adjustable microwave signal based on single-mode dual-core optical fiber, it is characterised in that the microwave signal produces
Single-mode optics core fibre brillouin frequency displacement regulating device is used in generation method and device, is such as changed fiber optic temperature, be may be implemented adjustable
The output of humorous microwave signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810100177.7A CN110113104B (en) | 2018-02-01 | 2018-02-01 | Device for generating adjustable microwave signal based on single-mode double-core optical fiber |
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| CN201810100177.7A CN110113104B (en) | 2018-02-01 | 2018-02-01 | Device for generating adjustable microwave signal based on single-mode double-core optical fiber |
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| CN110113104A true CN110113104A (en) | 2019-08-09 |
| CN110113104B CN110113104B (en) | 2021-07-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048969A (en) * | 2019-12-30 | 2020-04-21 | 电子科技大学 | Frequency doubling photoelectric oscillator based on stimulated Brillouin scattering effect |
| CN112797971A (en) * | 2020-12-11 | 2021-05-14 | 浙江大学 | Differential fiber-optic gyroscope based on temperature drift suppression characteristic of double-core fiber |
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| CN112797971A (en) * | 2020-12-11 | 2021-05-14 | 浙江大学 | Differential fiber-optic gyroscope based on temperature drift suppression characteristic of double-core fiber |
| CN112797971B (en) * | 2020-12-11 | 2022-05-27 | 浙江大学 | Differential fiber optic gyroscope based on characteristic of inhibiting temperature drift of double-core fiber |
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| CN110113104B (en) | 2021-07-02 |
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Effective date of registration: 20221230 Address after: 366199 second floor, building 3, 345 Futian Road, Junxi Town, Datian County, Sanming City, Fujian Province Patentee after: FUJIAN GUI COMM-TECH CO.,LTD. Address before: No.1, Jinji Road, Guilin City, Guangxi Zhuang Autonomous Region Patentee before: GUILIN University OF ELECTRONIC TECHNOLOGY |