CN201656238U - Device for generating microwave signal by using multi-wavelength Brillouin laser - Google Patents
Device for generating microwave signal by using multi-wavelength Brillouin laser Download PDFInfo
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- CN201656238U CN201656238U CN2009202953779U CN200920295377U CN201656238U CN 201656238 U CN201656238 U CN 201656238U CN 2009202953779 U CN2009202953779 U CN 2009202953779U CN 200920295377 U CN200920295377 U CN 200920295377U CN 201656238 U CN201656238 U CN 201656238U
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- 239000000835 fiber Substances 0.000 claims abstract description 33
- 239000013307 optical fiber Substances 0.000 claims abstract description 31
- 238000001228 spectrum Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052691 Erbium Inorganic materials 0.000 abstract 2
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 abstract 2
- 238000004891 communication Methods 0.000 description 4
- 230000035559 beat frequency Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The utility model relates to a device for generating a microwave signal by using a multi-wavelength Brillouin laser. A conventional device is difficult to obtain high frequency. The device comprises an adjustable narrow-band light source, two isolators, three couplers, an erbium doped fibre amplifier, two optical fibre circulators, a Sagnac loop mirror, a fibre Bragg grating and a photoelectric detector, wherein the adjustable narrow-band light source is optically connected with one isolator; an output end of the isolator is optically connected with one coupler; the output end of the coupler is optically connected with the other two couplers respectively; and one light path is provided with the optical fibre circulator, the erbium doped fibre amplifier and the isolator. By changing the wavelength of pump light, the device can achieve a continuously adjustable multi-wavelength pass band; and because Brillouin gain fibre is long, the four-wave mixing effect can be effectively suppressed and the power spectrums of multi-wavelength signal channels with equal frequency interval are distributed flatly.
Description
Technical field
The utility model belongs to photoelectron and microwave photon is learned the field, has related to a kind of device that utilizes multi-wavelength Brillouin laser to produce microwave signal, is applicable to radio communication and radar communications system.
Background technology
Along with advancing by leaps and bounds of information technology, the high speed development of information industry, the aspects such as national defense construction of people's productive life, country grow with each passing day to the demand of information.Wherein, radio communication all is widely used in data service, voice, military project as the communication common tool.Adopt high-frequency microwave and millimeter-wave signal as carrier wave, power system capacity will significantly be promoted.Because the restriction of electronic bottleneck, microwave signal source is very big challenge to the development of 30～70GHz high band for the traditional microwave device, becomes an important channel that produces high-frequency microwave signal and utilize optical means to produce microwave signal.The optics of high-frequency microwave produces multiple scheme, as two pouring-in lockings, phase type locked laser, dual laser, luminous intensity or light phase modulation or the like.
Wherein, the stokes light and the pump light that utilize Brillouin laser to produce are one of basic skills by beat frequency generation microwave signal, and it can provide the narrow linewidth microwave signal source of about 10GHz.But because the stationarity of stimulated Brillouin effect channel spacing 10GHz, caused acquisition greater than the high-frequency microwave signal of the 10GHz difficulty that becomes.Therefore, take effective ways to obtain stable multi-wavelength Brillouin fiber laser, high-order stokes light and the pump light that produces carried out beat frequency, thereby the output frequency that improves microwave signal is crucial.
The multi-wavelength Brillouin fiber laser still satisfies the research focus of wavelength-division multiplex technique requirement, advantages such as this multi wave length illuminating source has stable output under the room temperature, live width is extremely narrow, wavelength pass band is adjustable, threshold value is low, power spectrum is smooth are the perfect light sources of ultra dense wavelength division multiple system.Under this background, become more urgent for the research of multi-wavelength Brillouin fiber laser.
Summary of the invention
The utility model provides a kind of device that utilizes multi-wavelength Brillouin laser to produce microwave signal at the deficiencies in the prior art.
The technical scheme that the utility model technical solution problem is adopted is:
The device that utilizes multi-wavelength Brillouin laser to produce microwave signal comprises adjustable narrow-band light source, first isolator, the one or three port coupler, the two or three port coupler, second isolator, erbium-doped fiber amplifier, first optical fiber circulator, monomode fiber, the Sagnac annular mirror, second optical fiber circulator, Fiber Bragg Grating FBG, four port coupler, photodetector, wherein adjustable narrow-band light source, first isolator, the two or three port coupler, second isolator, erbium-doped fiber amplifier, first optical fiber circulator, monomode fiber, the Sagnac annular mirror has constituted multi-wavelength Brillouin laser.
Adjustable narrow-band light source is connected with the input light of first isolator, the output of first isolator is connected with the port light of the single port end of the one or three port coupler, a port of the dual-port end of the one or three port coupler is connected with a port light of the dual-port end of the two or three port coupler, and another port of the dual-port end of the one or three port coupler is connected with a port light of four port coupler, one end;
The port of the single port end of the two or three port coupler is connected with 1 mouthful of light of first optical fiber circulator, 3 mouthfuls of first optical fiber circulator are connected with the input light of erbium-doped fiber amplifier, the output of erbium-doped fiber amplifier is connected with the input light of second isolator, and the second isolator output is connected with another port light of the dual-port end of the two or three port coupler;
2 mouthfuls of first optical fiber circulator are connected with an end light of monomode fiber, the other end of monomode fiber is connected with Sagnac annular mirror input light, Sagnac annular mirror output is connected with 1 mouthful of light of second optical fiber circulator, 2 mouthfuls of second optical fiber circulator are connected with Fiber Bragg Grating FBG light, 3 mouthfuls of another port light with four port coupler, one end of second optical fiber circulator are connected, and a port of the four port coupler other ends is connected with the input light of photodetector.
The beneficial effects of the utility model are: change the pump light wavelength and can make the multi-wavelength passband adjustable continuously; The brillouin gain fiber lengths is longer, can effectively suppress four-wave mixing effect, makes that the Power Spectrum Distribution of equifrequent multi-wavelength signals passage at interval is smooth; Simple in structure; Stable output under the room temperature; Brillouin gain in monomode fiber, provide live width narrower, have accurate frequency displacement, stokes light that phase place is relevant with pump light signals, its frequency interval has only 10.8GHz, and this provides good light source for realize high-frequency microwave signal output by heterodyne method.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of device that utilizes multi-wavelength Brillouin laser to produce microwave signal comprises adjustable narrow-band light source 1, first isolator 2, the one or three port coupler 3, the two or three port coupler 4, second isolator 5, erbium-doped fiber amplifier 6, first optical fiber circulator 7, monomode fiber 8, Sagnac annular mirror 9, second optical fiber circulator 10, Fiber Bragg Grating FBG 11, four port coupler 12, photodetector 13, wherein adjustable narrow-band light source 1, first isolator 2, the two or three port coupler 4, second isolator 5, erbium-doped fiber amplifier 6, first optical fiber circulator 7, monomode fiber 8, Sagnac annular mirror 9 has constituted multi-wavelength Brillouin laser.
Adjustable narrow-band light source 1 is connected with the input light of first isolator 2, the output of first isolator 2 is connected with a mouth light of the one or three port coupler 3, the b mouth of the one or three port coupler 3 is connected with the d mouth light of the two or three port coupler 4, and the c mouth of the one or three port coupler 3 is connected with the g mouth light of four port coupler 12;
The e mouth of the two or three port coupler 4 is connected with 1 mouthful of light of first optical fiber circulator 7,3 mouthfuls of first optical fiber circulator 7 are connected with the input light of erbium-doped fiber amplifier 6, the output of erbium-doped fiber amplifier 6 is connected with the input light of second isolator 5, and second isolator, 5 outputs are connected with the f mouth light of the two or three port coupler 4;
2 mouthfuls of first optical fiber circulator 7 are connected with an end light of monomode fiber 8, the other end of monomode fiber 8 is connected with Sagnac annular mirror 9 input light, Sagnac annular mirror 9 outputs are connected with 1 mouthful of light of second optical fiber circulator 10,2 mouthfuls of second optical fiber circulator 10 are connected with Fiber Bragg Grating FBG 11 light, 3 mouthfuls of second optical fiber circulator 10 are connected with the i mouth light of four port coupler 12, and the h mouth of four port coupler 12 is connected with the input light of photodetector 13.
This device course of work is: at first the pump spectrum light that sends of adjustable narrow-band light source is divided into two-way pump spectrum light after first isolator and the one or three port coupler; Road pump spectrum light is wherein exported multistage stokes light through the two or three port coupler, second isolator, erbium-doped fiber amplifier, first optical fiber circulator, monomode fiber and Sagnac annular mirror then, and multistage stokes light is exported single channel high-order stokes light after second optical fiber circulator, Fiber Bragg Grating FBG filtering; Last single channel high-order stokes light and another road pump spectrum light are port coupler place coupling output in 50: 50 four in power ratio, beat frequency obtains the high-frequency microwave signal of high spectrum purity behind the part arrival high-speed photodetector, be input to frequency spectrograph 14 and carry out spectral observation and analysis, another part arrives spectrometer 15 and carries out the observation of spectral domain signal simultaneously.
In the utility model, coupler, optical fiber circulator, isolator, amplifier, Fiber Bragg Grating FBG, photodetector, tunable light source, monomode fiber all can be selected various commercialization components and parts for use.
Claims (1)
1. device that utilizes multi-wavelength Brillouin laser to produce microwave signal, comprise adjustable narrow-band light source, first isolator, the one or three port coupler, the two or three port coupler, second isolator, erbium-doped fiber amplifier, first optical fiber circulator, monomode fiber, the Sagnac annular mirror, second optical fiber circulator, Fiber Bragg Grating FBG, four port coupler, photodetector, it is characterized in that: adjustable narrow-band light source is connected with the input light of first isolator, the output of first isolator is connected with the port light of the single port end of the one or three port coupler, a port of the dual-port end of the one or three port coupler is connected with a port light of the dual-port end of the two or three port coupler, and another port of the dual-port end of the one or three port coupler is connected with a port light of four port coupler, one end;
The port of the single port end of the two or three port coupler is connected with 1 mouthful of light of first optical fiber circulator, 3 mouthfuls of first optical fiber circulator are connected with the input light of erbium-doped fiber amplifier, the output of erbium-doped fiber amplifier is connected with the input light of second isolator, and the second isolator output is connected with another port light of the dual-port end of the two or three port coupler;
2 mouthfuls of first optical fiber circulator are connected with an end light of monomode fiber, the other end of monomode fiber is connected with Sagnac annular mirror input light, Sagnac annular mirror output is connected with 1 mouthful of light of second optical fiber circulator, 2 mouthfuls of second optical fiber circulator are connected with Fiber Bragg Grating FBG light, 3 mouthfuls of another port light with four port coupler, one end of second optical fiber circulator are connected, and a port of the four port coupler other ends is connected with the input light of photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202953779U CN201656238U (en) | 2009-12-29 | 2009-12-29 | Device for generating microwave signal by using multi-wavelength Brillouin laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202953779U CN201656238U (en) | 2009-12-29 | 2009-12-29 | Device for generating microwave signal by using multi-wavelength Brillouin laser |
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| Publication Number | Publication Date |
|---|---|
| CN201656238U true CN201656238U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202953779U Expired - Lifetime CN201656238U (en) | 2009-12-29 | 2009-12-29 | Device for generating microwave signal by using multi-wavelength Brillouin laser |
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| CN (1) | CN201656238U (en) |
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2009
- 2009-12-29 CN CN2009202953779U patent/CN201656238U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101124 Effective date of abandoning: 20091229 |