CN109244801A - Tunable optical electrical oscillator and method based on random Brillouin optical fiber laser - Google Patents
Tunable optical electrical oscillator and method based on random Brillouin optical fiber laser Download PDFInfo
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- CN109244801A CN109244801A CN201811195238.9A CN201811195238A CN109244801A CN 109244801 A CN109244801 A CN 109244801A CN 201811195238 A CN201811195238 A CN 201811195238A CN 109244801 A CN109244801 A CN 109244801A
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- 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
- H01S1/00—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range
- H01S1/02—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range solid
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Abstract
Present disclose provides a kind of tunable super-narrow line width optical-electronic oscillator based on random Brillouin optical fiber laser, it include: the first tunable laser (1), second tunable laser (2), coupler (3), beam splitter (4), intensity modulator (5), erbium-doped fiber amplifier (6), first circulator (7), highly nonlinear optical fiber (8), the two the first circulators (9), single mode optical fiber (10), photodetector (11), power splitter (12) and phase-locked loop systems (13), form an immediate feedback system, so that the two beam laser that two tunable laser issue have the phase difference of fixing-stable.Utilize the modulating characteristic of intensity modulator, the nonlinear characteristic of highly nonlinear optical fiber, the feedback characteristics of single mode optical fiber, the wavelength fast tunable characteristic of tunable laser, and performance occurs for the microwave of optical-electronic oscillator, generates regulable center frequency, and stablizes the extremely narrow microwave signal of line width.
Description
Technical field
This disclosure relates to Microwave photonics technical field more particularly to it is a kind of based on random Brillouin optical fiber laser can
Tune super-narrow line width optical-electronic oscillator and method.
Background technique
The microwave source of high quality has a very wide range of applications in many fields, such as in communications industry, phased-array radar
System, long-range spaced antenna etc..Wherein, the method that Microwave photonics generate microwave signal has with roomy, phase
The advantages such as noise is low, one of method for directly generating microwave signal is light heterodyne method, with the frequency needed with us
The problems such as two beam laser beat frequencies generation microwave signal of difference, the line width and frequency drift of this two beam laser of method, all can be direct
Reflect in the microwave signal of generation, another method, generates microwave signal with optical-electronic oscillator, optical-electronic oscillator can be with
The signal for generating high frequency, high q-factor, the high-quality of Low phase noise is a kind of ideal signal generation apparatus.One kind is based on random
The method that Brillouin optical fiber laser generates microwave signal is proposed that the method can produce the extremely narrow microwave letter of line width by people before this
Number (three dB bandwidth be less than 10Hz), but the unstability based on stimulated Brillouin scattering, the microwave signal of generation equally have
Extremely unstable feature hardly results in specific application.
In order to realize it is extremely narrow stablize tunable microwave source, the invention proposes one kind be based on random Brillouin fiber optic laser
The tunable super-narrow line width optical-electronic oscillator of device, by introducing random Brillouin fiber optic laser in traditional optical-electronic oscillator
Device generates the adjustable microwave signal that line width is extremely narrow and stability is good.
Summary of the invention
(1) technical problems to be solved
The tunable super-narrow line width optical-electronic oscillator that present disclose provides a kind of based on random Brillouin optical fiber laser and
Method, at least partly to solve technical problem set forth above.
(2) technical solution
According to one aspect of the disclosure, a kind of tunable ultra-narrow line based on random Brillouin optical fiber laser is provided
Wide optical-electronic oscillator, comprising: the first tunable laser, the second tunable laser, coupler, beam splitter, intensity modulator,
Erbium-doped fiber amplifier, the first circulator, highly nonlinear optical fiber, the two the first circulator, single mode optical fiber, photodetector, function
Device and phase-locked loop systems is divided to constitute an immediate feedback system, so that the two beam laser that two tunable laser issue have
The phase difference of fixing-stable；
Wherein, the first tunable laser is connected to coupler first input end, the output end of the second tunable laser
It is connected to the second input terminal of coupler, coupler output is connected to beam splitter input terminal, and the first output end of beam splitter is connected to
Phase-locked loop systems input terminal, phase-locked loop systems output end are connected to the second tunable laser；The connection of beam splitter second output terminal
To intensity modulator input terminal, intensity modulator output end is connected to erbium-doped fiber amplifier input terminal, erbium-doped fiber amplifier
Output end is connected to the first circulator input terminal, and the first output end of first annular device is connected to the input of the second circulator first
End, second output terminal is connected to highly nonlinear optical fiber first end, and highly nonlinear optical fiber second end is connected to the second circulator
Second input terminal, the output end of the second circulator connect single mode optical fiber first end, and single mode optical fiber second end connects photodetector
Input terminal, photodetector output end connect the input terminal of power splitter, and the first output end of power splitter is connected to frequency spectrograph, and second
Output end is connected to intensity modulator, to form an optoelectronic oscillation loop.
In some embodiments, by adjusting the wavelength difference of the first tunable laser and the second tunable laser, light
Electrical oscillator system can generate the microwave signal that line width is extremely narrow and stability is good.
In some embodiments, the first tunable laser, the second tunable laser, coupler, beam splitter, intensity tune
Device processed, erbium-doped fiber amplifier, first annular device, the second circulator, high non-linearity light, single mode optical fiber, photodetector it
Between by optical fiber connect, between beam splitter and phase-locked loop systems by optical fiber connection；Photodetector, power splitter, intensity modulated
By cable connection between device, pass through cable connection between phase-locked loop systems and tunable laser.
In some embodiments, the first tunable laser, the second tunable laser, coupler, are mixed intensity modulator
Doped fiber amplifier, first annular device, the second circulator, highly nonlinear optical fiber, single mode optical fiber constitute a random Brillouin
The central wavelength of optical fiber laser, the laser is determined by the central wavelength of the first tunable laser, the second tunable laser
It is fixed, the extremely narrow laser of line width can be issued.
In some embodiments, the first tunable laser, the second tunable laser are that wavelength can quick continuous tuning
Semiconductor laser.
In some embodiments, highly nonlinear optical fiber is the high-Q microwave energy-storage travelling wave tube with optical nonlinearity, the length is
Hundreds of meters to tens of kms.
In some embodiments, single mode optical fiber is low-loss feedback element, and the length is thousands of rice to tens of kms.
In some embodiments, the Dispersion managed of optical-electronic oscillator loop is to zero, to make the signal of different frequency in ring
Delay having the same in road.
In some embodiments, phase-locked loop systems ensure the first tunable laser, the second tunable laser hair for controlling
Optical signal out has stable phase difference.
Another aspect of the present disclosure provides it is a kind of using described based on random Brillouin optical fiber laser
The method of tunable super-narrow line width optical-electronic oscillator, comprising: the first tunable laser, the second tunable laser issue two beams
There is the laser of specific frequency difference to be coupled as all the way by coupler, and after being divided into two by beam splitter, wherein all the way
It enters in phase-locked loop systems and immediate feedback is into tunable laser, so that the first tunable laser, second tunable
There is fixed phase difference between the laser that laser issues, in addition then enters all the way in intensity modulator by the micro- of beat frequency generation
Wave signal modulation generates the positive single order sideband that two difference on the frequencies are equal to two beam laser frequency differences；By modulated two-beam carrier wave
It enters in erbium-doped fiber amplifier after being amplified to the threshold value higher than stimulated Brillouin scattering, Gao Fei is entered by circulator
In linear optical fiber, and Brillouin scattering occurs in highly nonlinear optical fiber, and inspires two stokes waves and return to circulator；
And two stokes waves are entered in circulator by circulator, then are entered in single mode optical fiber and occurred reversely by circulator
Rayleigh scattering, single mode optical fiber are entered the light of reversed Rayleigh scattering in highly nonlinear optical fiber by circulator as feedback optical fiber
Distributed feedback is provided, is amplified to form narrow-linewidth laser by gain, the two beam narrow-linewidth lasers narrowed enter photoelectricity
Beat frequency generates the target microwave signal of narrow linewidth in detector, is output to frequency spectrum by power splitter rear portion target microwave signal
It is observed in instrument, another part is fed back as starting of oscillation signal into intensity modulator, to form optical-electronic oscillator structure.
(3) beneficial effect
It can be seen from the above technical proposal that tunable super-narrow line width of the disclosure based on random Brillouin optical fiber laser
Optical-electronic oscillator and method at least have the advantages that one of them:
(1) modulating characteristic of intensity modulator is utilized, the feedback of the nonlinear characteristic of highly nonlinear optical fiber, single mode optical fiber is special
Property, performance occurs for the microwave of the wavelength fast tunable characteristic of tunable laser and optical-electronic oscillator, and generating centre frequency can
It adjusts, and stablizes the extremely narrow microwave signal of line width；
(2) since system does not need light, the filter on electricity, microwave signal frequency caused by optical-electronic oscillator loop by
The difference on the frequency between two laser that tunable laser issues determines, therefore the wavelength by adjusting two tunable laser
Difference, it can be achieved that microwave signal wide-band tuning.
Detailed description of the invention
Fig. 1 is tunable super-narrow line width optical-electronic oscillator of the embodiment of the present disclosure based on random Brillouin optical fiber laser
Structural schematic diagram.
Fig. 2 is tunable super-narrow line width optical-electronic oscillator of the embodiment of the present disclosure based on random Brillouin optical fiber laser
Optic spectrum line figure.
[embodiment of the present disclosure main element symbol description in attached drawing]
1, the first tunable laser；2, the second tunable laser
3, coupler；4, beam splitter
5, intensity modulator 6, erbium-doped fiber amplifier
7, the first circulator 8, highly nonlinear optical fiber
9,10 single mode optical fiber of the second circulator
11, photodetector 12, power splitter
13, phase-locked loop systems.
Specific embodiment
The tunable super-narrow line width optical-electronic oscillator that present disclose provides a kind of based on random Brillouin optical fiber laser and
Method.Using the modulating characteristic of intensity modulator, the nonlinear characteristic of highly nonlinear optical fiber, the feedback characteristics of single mode optical fiber can
Performance occurs for the wavelength fast tunable characteristic of tuned laser and the microwave of optical-electronic oscillator, generates regulable center frequency, and
Stablize the extremely narrow microwave signal of line width.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
Disclosure some embodiments will be done referring to appended attached drawing in rear and more comprehensively describe to property, some of but not complete
The embodiment in portion will be shown.In fact, the various embodiments of the disclosure can be realized by many different forms, without that should be solved
It is interpreted as being limited to embodiments set forth herein；Relatively, these embodiments are provided so that the disclosure meets applicable legal requirement.
In an exemplary embodiment of the disclosure, provide a kind of based on the adjustable of random Brillouin optical fiber laser
Humorous super-narrow line width optical-electronic oscillator.Fig. 1 is tunable ultra-narrow line of the embodiment of the present disclosure based on random Brillouin optical fiber laser
The structural schematic diagram of wide optical-electronic oscillator.As shown in Figure 1, the tunable ultra-narrow line based on random Brillouin optical fiber laser
Wide optical-electronic oscillator includes: the first tunable laser 1, the second tunable laser 2, coupler 3, beam splitter 4, intensity modulated
Device 5, erbium-doped fiber amplifier 6, the first circulator 7, highly nonlinear optical fiber 8, the two the first circulators 9, single mode optical fiber 10, photoelectricity
Detector 11, power splitter 12 and phase-locked loop systems 13 constitute an immediate feedback system, can make two tunable lasers
The two beam laser that device issues have the phase difference of fixing-stable.By adjusting the wavelength difference of two tunable laser, photoelectricity vibration
Swinging device system can produce that line width is extremely narrow and the preferable microwave signal of stability.
Wherein, the first tunable laser 1 is connected to the output of 3 first input end of coupler, the second tunable laser 2
End is connected to 3 second input terminal of coupler, and 3 output end of coupler is connected to 4 input terminal of beam splitter, 4 first output end of beam splitter
It is connected to 13 input terminal of phase-locked loop systems, 13 output end of phase-locked loop systems is connected to the second tunable laser 2；Beam splitter 4
Two output ends are connected to 5 input terminal of intensity modulator, and 5 output end of intensity modulator is connected to 6 input terminal of erbium-doped fiber amplifier,
6 output end of erbium-doped fiber amplifier is connected to 7 input terminal of the first circulator, and the first output end of first annular device 7 is connected to
9 first input end of second ring device, second output terminal are connected to 8 first end of highly nonlinear optical fiber, and highly nonlinear optical fiber 8 second
End is connected to 9 second input terminal of the second circulator, and the output end of the second circulator 9 connects 10 first end of single mode optical fiber, single-mode optics
Fine second end connects 11 input terminal of photodetector, and 11 output end of photodetector connects the input terminal of power splitter 12, power splitter
12 the first output end is connected to frequency spectrograph, and second output terminal is connected to intensity modulator, to form an oscillating loop.
Wherein, the first tunable laser 1, the coupler 3,1 of the second tunable laser 2,1 beam splitter 4,1 are strong
Spend 5,1 erbium-doped fiber amplifier 6 of modulator, first annular device 7, the single mode of high non-linearity light 8,1 of the second circulator 9,1
It is connected between 10,1 photodetector 11 of optical fiber by optical fiber, is connected between beam splitter 4 and phase-locked loop systems 13 by optical fiber.
Pass through cable connection, 1 phase-locked loop systems 13 and 1 between 1 intensity modulator 5 of power splitter 12,1 of photodetector 11,1
Pass through cable connection between a tunable laser 2.
First tunable laser 1, the second tunable laser 2, coupler 3, intensity modulator 5, Erbium-doped fiber amplifier
Device 6, first annular device 7, the second circulator 9, highly nonlinear optical fiber 8, single mode optical fiber 10 together constitute a random Brillouin
Optical fiber laser, the central wavelength of the laser is by the first tunable laser 1, the central wavelength of the second tunable laser 2
It determines, the extremely narrow laser of line width can be issued.
Specifically, the first tunable laser 1, second tunable laser 2 are that wavelength quickly continuous tuning can partly be led
Body laser.
Highly nonlinear optical fiber 8 is the high-Q microwave energy-storage travelling wave tube with optical nonlinearity, and the length is hundreds of meters to tens of thousand
Rice differs.
Single mode optical fiber 10 is that have low-loss feedback element, and the length is thousands of rice to tens of kms etc..
Further, the dispersion of optical-electronic oscillator loop should be controlled to zero, to make the signal of different frequency in the loop
Delay having the same.
Phase-locked loop systems 13 are used to control the optical signal tool for ensuring that the first tunable laser 1, the second tunable laser 2 issue
There is stable phase difference.
When system works, the first tunable laser 1, the second tunable laser 2 two beams of sending have specific frequency
The laser of difference is coupled as all the way by coupler 3, and spectrum such as (a) in Fig. 2 is shown at this time, and is divided into two it by beam splitter 4
Afterwards, wherein entering in phase-locked loop systems 13 all the way and immediate feedback is into tunable laser 2, so that the first tunable laser
There is fixed phase difference between the laser that device 1, the second tunable laser 2 issue, in addition then enters intensity modulator 5 all the way
The middle microwave signal generated by beat frequency is modulated, and is generated two difference on the frequencies and is equal to the positive single order sideband of two beam laser frequency differences (herein
The range of discussion is small signal modulation, therefore ignores other high-order sidebands)；By modulated two-beam carrier wave, in Fig. 2
(b) it shown in, enters in erbium-doped fiber amplifier after being amplified to the threshold value higher than stimulated Brillouin scattering, passes through circulator 7
It enters in highly nonlinear optical fiber 8, and Brillouin scattering occurs in highly nonlinear optical fiber 8, and inspire two Stokes
Wave returns to circulator 7, in spectrogram such as Fig. 2 at this time shown in (c)；And two stokes waves enter ring by circulator 7
It in shape device 9, then is entered in single mode optical fiber 10 by circulator 9 and reversed Rayleigh scattering occurs, single mode optical fiber 10 is used as feedback light
The light of reversed Rayleigh scattering is entered in highly nonlinear optical fiber 8 by circulator 9 and provides distributed feedback by fibre, by gain
Amplification forms narrow-linewidth laser, and the two beam narrow-linewidth lasers narrowed enter beat frequency in photodetector 11 and generate narrow linewidth
Target microwave signal is output in frequency spectrograph by 12 rear portion target microwave signal of power splitter and is observed, another part
As starting of oscillation signal feedback into intensity modulator 5, to form optical-electronic oscillator structure, the optical-electronic oscillator structure of formation is real
Now microwave signal is constantly narrowed, because there is the double shield of phase-locked loop systems and optical-electronic oscillator structure, so that generate
Microwave signal has better stability；And the pole narrow-linewidth laser that random Brillouin optical fiber laser generates, then ensure that can
To generate the microwave signal of pole narrow linewidth.
Since system does not need light, the filter on electricity, microwave signal frequency caused by optical-electronic oscillator loop is by can
The difference on the frequency between two laser that tuned laser issues determines, therefore can realize the wide-band tuning of microwave signal.Furthermore by
In Fig. 2 (d) it is found that spectrum as shown in the figure can also beat frequency generate other clutters, but first, those light optical powers are smaller, produce
Raw clutter power is smaller, second, being can be with when the Random Laser power that random Brillouin optical fiber laser generates is sufficiently large
There is inhibiting effect to other microwave signals generated, so will not influence the signal quality of generation.
In addition, the above-mentioned definition to each element and method be not limited in the various specific structures mentioned in embodiment,
Shape or mode, those skilled in the art can replace with simply being known to its structure, such as: can add in systems
Enter electric amplifier to amplify signal；Any other form can be used and can be with the phase-locked loop systems etc. of locking phase.Also, institute
Attached attached drawing is to simplify and used as illustrating.Number of devices, shape and size shown in the drawings can according to actual conditions and
It modifies, and the configuration of device is likely more complexity.
So far, attached drawing is had been combined the embodiment of the present disclosure is described in detail.It should be noted that in attached drawing or saying
In bright book text, the implementation for not being painted or describing is form known to a person of ordinary skill in the art in technical field, and
It is not described in detail.In addition, the above-mentioned definition to each element and method be not limited in mentioning in embodiment it is various specific
Structure, shape or mode, those of ordinary skill in the art simply can be changed or be replaced to it.
It should also be noted that, the direction term mentioned in embodiment, for example, "upper", "lower", "front", "rear", " left side ",
" right side " etc. is only the direction with reference to attached drawing, not is used to limit the protection scope of the disclosure.Through attached drawing, identical element by
Same or similar appended drawing reference indicates.When may cause understanding of this disclosure and cause to obscure, conventional structure will be omitted
Or construction.
And the shape and size of each component do not reflect actual size and ratio in figure, and only illustrate the embodiment of the present disclosure
Content.In addition, in the claims, any reference symbol between parentheses should not be configured to the limit to claim
System.
It unless there are known entitled phase otherwise anticipates, the numerical parameter in this specification and appended claims is approximation, energy
Enough bases pass through the resulting required characteristic changing of content of this disclosure.Specifically, all be used in specification and claim
The middle content for indicating composition, the number of reaction condition etc., it is thus understood that repaired by the term of " about " in all situations
Decorations.Under normal circumstances, the meaning expressed refers to include by specific quantity ± 10% variation in some embodiments, some
± 5% variation in embodiment, ± 1% variation in some embodiments, in some embodiments ± 0.5% variation.
Furthermore word "comprising" does not exclude the presence of element or step not listed in the claims.It is located in front of the element
Word "a" or "an" does not exclude the presence of multiple such elements.
The word of ordinal number such as " first ", " second ", " third " etc. used in specification and claim, with modification
Corresponding element, itself is not meant to that the element has any ordinal number, does not also represent the suitable of a certain element and another element
Sequence in sequence or manufacturing method, the use of those ordinal numbers are only used to enable an element and another tool with certain name
Clear differentiation can be made by having the element of identical name.
In addition, unless specifically described or the step of must sequentially occur, there is no restriction in the above institute for the sequence of above-mentioned steps
Column, and can change or rearrange according to required design.And above-described embodiment can be based on the considerations of design and reliability, that
This mix and match is used using or with other embodiments mix and match, i.e., the technical characteristic in different embodiments can be freely combined
Form more embodiments.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.Also, in the unit claims listing several devices, several in these devices can be by same hard
Part item embodies.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each open aspect,
Above in the description of the exemplary embodiment of the disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
The disclosure of shield requires features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as the separate embodiments of the disclosure.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of tunable super-narrow line width optical-electronic oscillator based on random Brillouin optical fiber laser, comprising: first is tunable
Laser (1), the second tunable laser (2), coupler (3), beam splitter (4), intensity modulator (5), Erbium-doped fiber amplifier
Device (6), the first circulator (7), highly nonlinear optical fiber (8), the two the first circulators (9), single mode optical fiber (10), photodetector
(11), power splitter (12) and phase-locked loop systems (13) constitute an immediate feedback system, so that two tunable laser hairs
Two beam laser out have the phase difference of fixing-stable；
Wherein, the first tunable laser (1) is connected to coupler (3) first input end, the second tunable laser (2) it is defeated
Outlet is connected to (3) second input terminal of coupler, and coupler (3) output end is connected to beam splitter (4) input terminal, beam splitter 4
One output end is connected to phase-locked loop systems (13) input terminal, and phase-locked loop systems (13) output end is connected to the second tunable laser
(2)；Beam splitter (4) second output terminal is connected to intensity modulator (5) input terminal, and intensity modulator (5) output end, which is connected to, to be mixed
Doped fiber amplifier (6) input terminal, erbium-doped fiber amplifier (6) output end are connected to the first circulator (7) input terminal, the first ring
First output end of shape device (7) is connected to the second circulator (9) first input end, and second output terminal is connected to highly nonlinear optical fiber
(8) first end, and highly nonlinear optical fiber (8) second end is connected to (9) second input terminal of the second circulator, the second circulator
(9) output end connects single mode optical fiber (10) first end, and single mode optical fiber second end connects photodetector (11) input terminal, photoelectricity
Detector (11) output end connects the input terminal of power splitter (12), and the first output end of power splitter (12) is connected to frequency spectrograph, the
Two output ends are connected to intensity modulator, to form an optoelectronic oscillation loop.
2. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein by adjusting the first tunable laser
The wavelength difference of device (1) and the second tunable laser (2), optical-electronic oscillator system can generate that line width is extremely narrow and stability is good
Microwave signal.
3. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein the first tunable laser (1),
Two tunable laser (2), coupler (3), beam splitter (4), intensity modulator (5), erbium-doped fiber amplifier (6), the first ring
Shape device (7), the second circulator (9), high non-linearity light (8), single mode optical fiber (10), photodetector pass through optical fiber between (11)
Connection, is connect between beam splitter (4) and phase-locked loop systems (13) by optical fiber；Photodetector (11), power splitter (12), intensity
By cable connection between modulator (5), pass through cable connection between phase-locked loop systems (13) and tunable laser (2).
4. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein the first tunable laser (1),
Two tunable laser (2), coupler (3), intensity modulator (5), erbium-doped fiber amplifier (6), first annular device (7),
Second ring device (9), highly nonlinear optical fiber (8), single mode optical fiber (10) constitute a random Brillouin optical fiber laser, the laser
The central wavelength of device is determined by the central wavelength of the first tunable laser (1), the second tunable laser (2), can be issued
The extremely narrow laser of line width.
5. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein the first tunable laser (1),
Two tunable laser (2) be wavelength can quickly continuous tuning semiconductor laser.
6. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein highly nonlinear optical fiber (8) is that have
The high-Q microwave energy-storage travelling wave tube of optical nonlinearity, the length is hundreds of meters to tens of kms.
7. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein single mode optical fiber (10) is that low-loss is anti-
Element is presented, the length is thousands of rice to tens of kms.
8. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein the dispersion control of optical-electronic oscillator loop
It makes to zero, to make the signal delay having the same in the loop of different frequency.
9. tunable super-narrow line width optical-electronic oscillator according to claim 1, wherein phase-locked loop systems (13) are for controlling
The optical signal for ensuring that the first tunable laser (1), the second tunable laser (2) issue has stable phase difference.
10. a kind of using the tunable super-narrow line width photoelectricity based on random Brillouin optical fiber laser as described in claim 1
The method of oscillator, comprising: the first tunable laser (1), the second tunable laser (2) two beams of sending have specific frequency
After the laser of rate difference is coupled as all the way by coupler (3), and process beam splitter (4) is divided into two, wherein entering all the way
In phase-locked loop systems (13) and immediate feedback is in tunable laser (2) so that the first tunable laser (1), second can
There is fixed phase difference between the laser that tuned laser (2) issues, in addition then enters in intensity modulator (5) and clapped all the way
The microwave signal modulation that frequency generates, generates the positive single order sideband that two difference on the frequencies are equal to two beam laser frequency differences；It is modulated
Two-beam carrier wave enters in erbium-doped fiber amplifier be amplified to the threshold value higher than stimulated Brillouin scattering after, pass through circulator
(7) enter in highly nonlinear optical fiber (8), and Brillouin scattering occur in the highly nonlinear optical fiber (8), and inspire two this
Lentor wave returns to circulator (7)；And two stokes waves are entered in circulator (9) by circulator (7), then pass through ring
Shape device (9), which enters, occurs reversed Rayleigh scattering in single mode optical fiber (10), single mode optical fiber (10) will be reversed auspicious as feedback optical fiber
The light of benefit scattering is entered in highly nonlinear optical fiber (8) by circulator (9) provides distributed feedback, amplifies shape by gain
At narrow-linewidth laser, the two beam narrow-linewidth lasers narrowed enter the target that beat frequency in photodetector (11) generates narrow linewidth
Microwave signal is output in frequency spectrograph by power splitter (12) rear portion target microwave signal and is observed, and another part is made
It is starting of oscillation signal feedback in intensity modulator (5), to form optical-electronic oscillator structure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111628408A (en) * | 2020-05-19 | 2020-09-04 | 电子科技大学 | Frequency stabilization system of semiconductor laser |
| CN111934782A (en) * | 2020-07-10 | 2020-11-13 | 电子科技大学 | Photoelectric oscillator based on double light sources and adjustable optical filter |
| CN117833001A (en) * | 2024-03-01 | 2024-04-05 | 中北大学 | Tunable narrow linewidth self-excited Brillouin fiber laser |
| CN117833001B (en) * | 2024-03-01 | 2024-05-10 | 中北大学 | Tunable narrow linewidth self-excited Brillouin fiber laser |
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| CN102751644A (en) * | 2012-07-31 | 2012-10-24 | 西南交通大学 | Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect |
| CN106785812A (en) * | 2017-02-20 | 2017-05-31 | 盐城工学院 | Optical-electronic oscillator and adjusting method based on stimulated Brillouin scattering enlarge-effect |
| US20180138978A1 (en) * | 2013-05-01 | 2018-05-17 | U.S. Army Research Laboratory Attn: Rdrl-Loc-I | Opto-electronic oscillator with stimulated brillouin scattering feedbac, |
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| CN102751644A (en) * | 2012-07-31 | 2012-10-24 | 西南交通大学 | Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect |
| US20180138978A1 (en) * | 2013-05-01 | 2018-05-17 | U.S. Army Research Laboratory Attn: Rdrl-Loc-I | Opto-electronic oscillator with stimulated brillouin scattering feedbac, |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111628408A (en) * | 2020-05-19 | 2020-09-04 | 电子科技大学 | Frequency stabilization system of semiconductor laser |
| CN111934782A (en) * | 2020-07-10 | 2020-11-13 | 电子科技大学 | Photoelectric oscillator based on double light sources and adjustable optical filter |
| CN117833001A (en) * | 2024-03-01 | 2024-04-05 | 中北大学 | Tunable narrow linewidth self-excited Brillouin fiber laser |
| CN117833001B (en) * | 2024-03-01 | 2024-05-10 | 中北大学 | Tunable narrow linewidth self-excited Brillouin fiber laser |
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