CN105006739A - Brillouin scattering dynamic grating generation device and method based on capillary tube - Google Patents

Brillouin scattering dynamic grating generation device and method based on capillary tube Download PDF

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CN105006739A
CN105006739A CN 201510420967 CN201510420967A CN105006739A CN 105006739 A CN105006739 A CN 105006739A CN 201510420967 CN201510420967 CN 201510420967 CN 201510420967 A CN201510420967 A CN 201510420967A CN 105006739 A CN105006739 A CN 105006739A
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capillary
grating
dynamic
brillouin
laser
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CN 201510420967
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CN105006739B (en )
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朱恩亮
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盐城工学院
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Abstract

The invention discloses a Brillouin scattering dynamic grating generation device and a method based on a capillary tube. Laser is generated by a laser, two channels of beam signals are divided via a coupler from the laser, one beam generates back Brillouin scattering in a non-linear optical fiber, frequency shifting of a microwave signal source is performed via the other beam, the frequency difference of the two beams of optical path signals is the optical fiber Brillouin frequency shift, and Brillouin dynamic gratings are excited in the non-linear optical fiber; and the non-linear optical fiber is the capillary tube whose inner part is filled with refraction inner cores. According to the Brillouin scattering dynamic grating generation device and the method based on the capillary tube, the inner part of the capillary tube is filled with certain media to manufacture the non-linear optical fiber, the characteristic of the Brillouin dynamic gratings is adjusted via the control of the wavelength and power of a main laser and the frequency of the microwave signal source, dynamic gratings with the tunable grating characteristic are obtained, the electromagnetic interference is greatly reduced, and the device is advantaged by small size, high precision, low cost, and simple structure.

Description

一种基于毛细管的布里渊散射动态光栅产生装置及方法 An apparatus and method for dynamically generated based on Brillouin scattering grating capillary

技术领域 FIELD

[0001] 本发明涉及一种光栅产生装置及方法,具体涉及一种布里渊散射动态光栅产生装置及方法。 [0001] The present invention relates to apparatus and method for generating a raster, particularly, to a dynamic grating Brillouin scattering generating apparatus and method.

背景技术 Background technique

[0002] 光谱信号测量是光学测量和检测过程中最常用的测量手段,广泛应用于光通信、国防、航空航天、环保及材料等领域。 [0002] spectrum signal measurement is an optical measurement and detection of the most commonly used means of measurement, it is widely used in the field of optical telecommunications, defense, aerospace, environmental protection and materials. 在光谱信号测量中必须利用光纤光栅进行信号的选取,在测量的参数中,测量分辨率是光谱测量的最主要的技术指标。 Must be selected using a fiber grating spectrum signal in a measurement signal, the parameter measurement, the measurement resolution is the most important spectral measurement specifications. 由于受到光栅刻痕密度和光束孔径等参数的限制,使得基于传统光栅的光谱仪分辨率最高仅为几个Pm ;相比传统光栅光谱仪,扫描法布里-珀罗干涉仪虽能提供较高光谱分辨率,但它的波长测量范围和光谱分辨率是一对矛盾参数,无法在宽波长范围情况下获得较高的光谱分辨率。 Grating parameters due to restrictions density score and the beam aperture and the like, such that based on the conventional grating spectrograph resolution is only a few Pm is highest; compared to the conventional grating spectrometer, scanning Fabry - Perot interferometer, although providing higher spectral resolution, but its wavelength measurement range and spectral resolution is a contradiction parameters, can not achieve high spectral resolution wide wavelength range of conditions. 近年来,传统光谱仪的分辨率已经逐渐不能满足新技术的发展需求,成为新兴领域发展的一大瓶颈。 In recent years, the traditional resolution of the spectrometer has been increasingly unable to meet the development needs of new technology, it has become a major bottleneck in the development of new fields. 新涌现出来的应用需求对现有光谱仪的分辨率提出了挑战,因此探索新型的光谱分析机理,发展超高分辨光谱测量技术就成了一种必然趋势和目前迫切需要解决的问题。 The new emerging application requirements for existing resolution spectrometer challenges, therefore explore new mechanisms of spectral analysis, development ultra-high resolution spectroscopy technique has become an inevitable trend and there is an urgent need to solve.

[0003] 近年来,光纤中的布里渊动态光栅因具有全光产生、参数灵活可控的优点,已被广泛研究应用于全光信号处理、光纤传感、微波光子学、光学存储和光纤特性表征等,引起研究人员的高度重视。 [0003] In recent years, the optical fiber by Brillouin dynamic grating produced with full light, flexible and controllable parameters advantages, have been widely applied to the study of all-optical signal processing, optical sensing, microwave photonics, optical fibers and optical storage characterization, etc., aroused great interest among researchers. 董永康等研究人员提出的发明专利基于布里渊动态光栅的光谱分析装置及其分析方法,申请号201310231671.4,利用普通单模光纤产生布里渊动态光栅进行光谱分析;董永康等研究人员提出的发明专利基于受激布里渊散射动态光栅的微波光子滤波器及其滤波方法,申请号201310233987.7,利用保偏光纤产生布里渊动态光栅进行微波光子滤波设计。 Dongyong Kang other researchers have proposed patents and spectroscopic analysis apparatus Brillouin dynamic grating-based, Application No. 201310231671.4, using an ordinary single-mode fiber to produce a Brillouin dynamic grating spectral analysis; Dongyong Kang et researchers proposed Patent invention is based on microwave photon filter and filtering method stimulated Brillouin scattering dynamic grating, application No. 201310233987.7, polarization maintaining fiber using Brillouin dynamically generated microwave photonic grating filter design. 目前,他们都是利用普通单模光纤或者保偏光纤产生布里渊动态光栅,这些布里渊动态光栅的研究与开发都是集中在固定频率栗浦光产生固定光栅,因此,其反射波长也是固定的,限制了在高分辨率光谱分析技术中的应用。 Currently, they are using ordinary single mode fiber or polarization maintaining fiber generating Brillouin dynamic grating, which gratings Brillouin dynamic research and development are focused at a fixed frequency pump light generating Li fixed grating, so that the reflection wavelength is fixed , limits the application of high-resolution spectroscopy. 近年来,在激光技术、电子技术及新型光电探测元件发展的推动下,光谱分辨率和动态范围都提高了几个数量级,因此,在利用普通单模光纤或者保偏产生的布里渊动态光栅很难满足这些新的挑战。 In recent years, laser technology, electronic technology and promote the development of new photoelectric detection elements, the spectral resolution and dynamic range have increased several orders of magnitude, thus Brillouin dynamic grating using a general single mode fiber or polarization maintaining generated difficult to meet these new challenges.

发明内容 SUMMARY

[0004] 发明目的:本发明的目的在于针对现有技术的不足,提供一种基于毛细管的布里渊散射动态光栅产生装置及方法,不仅能够产生高质量的布里渊动态光栅,而且能够获得高精度可调谐的动态光栅栅距等参数。 [0004] The object of the invention: object of the present invention is the deficiency of the prior art, to provide an apparatus and method for dynamically generated based on Brillouin scattering grating capillary, not only to produce high-quality Brillouin dynamic grating, and can be obtained precision dynamically tunable grating pitch parameters.

[0005] 技术方案:本发明提供了一种基于毛细管的布里渊散射动态光栅产生装置,包括两条光路,一条光路为依次连接的激光器、親合器、放大器、第一偏振控制器和非线性光纤,另一条从所述耦合器出发依次连接第二偏振控制器、调制器、偏振合束器最后回到非线性光纤,还包括同步控制器,所述同步控制器与激光器相连的同时通过微波信号源连接所述调制器;所述非线性光纤是以毛细管为载体的光纤,所述毛细管内部填充有折射内芯。 [0005] Technical Solution: The present invention provides an apparatus for generating a dynamic grating Brillouin scattering based on the capillary, comprising two optical paths, a laser light path is connected in turn, affinity, an amplifier, and a first non polarization controller Meanwhile linear fiber and the other from the coupler in turn connected to the second polarization controller, a modulator, a polarization beam combiner and finally back to the nonlinear optical fiber, further comprising a synchronization controller is connected, the synchronization controller through the laser a microwave source is connected to the modulator; capillary said nonlinear optical fiber is an optical fiber as the carrier, the interior of the capillary tube is filled with a refractive core.

[0006] 由于布里渊动态光栅本质上是由相干声波场激发的折射率光栅,一般是栗浦光I和栗浦光2,其频率差等于光纤布里渊频移且以相同的偏振态(X偏振)从光纤两端注入光纤,通过受激布里渊散射效应激发出相干声波场,形成布里渊动态光栅。 [0006] Since the refractive index of the grating excitation of a coherent acoustic field on the Brillouin dynamic grating nature, typically Li pump light I and Li pump light 2 with a frequency difference equal to the Brillouin frequency shift and with the same polarization state (X polarization ) injected from both ends of the optical fibers, the coherent sound wave field excited by stimulated Brillouin scattering, Brillouin dynamic grating is formed. 本发明的两条光路正是用于产生两路栗浦光,并在非线性光线中生成稳定且可调谐的布里渊动态光栅。 Two optical paths according to the present invention is used to generate two pump light Li, and generates stable and tunable grating in the nonlinear dynamic Brillouin light rays.

[0007] 进一步,所述毛细管介质为石英毛细管,可以增强毛细管的非线性特性,产生较强的布里渊散射效应。 [0007] Further, the capillary medium is a quartz capillary, the capillary may be enhanced nonlinear characteristic, produce strong Brillouin scattering effect.

[0008] 进一步,所述折射内芯为四氯化碳、二硫化碳及石墨烯中的一种或几种,可以通过改变介质中的种类及比例控制混合液的折射率,从而实现液芯光纤的单模传输。 [0008] Further, the inner core is a refractive one or more of carbon tetrachloride, carbon disulfide, and graphene, and the proportion of medium types can be controlled by changing the refractive index of the liquid mixture, the liquid core optical fiber in order to achieve single-mode transmission.

[0009] 进一步,所述毛细管的内径范围为2〜10 μ m。 [0009] Further, the inner diameter range of the capillary is 2~10 μ m.

[0010] 进一步,还包括与偏振合束器连接的探测激光器,探测信号光以y偏振态注入光纤,就可以被布里渊动态光栅反射形成反射信号。 [0010] Further, the probe further comprising a polarization combiner connected laser beam, light detection signal y polarization fiber injection, can be formed in the Brillouin dynamic grating reflector reflected signal.

[0011] 一种基于毛细管的布里渊散射动态光栅产生方法,激光器产生激光经耦合器分出两路光束信号,其中一路经放大器放大后进入第一偏振控制器中,从第一偏振控制器输出的光束注入非线性光纤中,在非线性光纤中产生背向布里渊散射;从耦合器分出的另一路光束信号经第二偏振控制器进入调制器,被调制后的输出光束经偏振合束器进入非线性光纤中,微波信号源对调制器中的光束进行移频,使得两束光路信号的频率相差光纤布里渊频移大小,同步控制器输出的同步信号分别给激光器和调制器,保证两者信号同步,在非线性光纤中激发布里渊动态光栅;所述非线性光纤是由预制体拉制而成的毛细管,通过飞秒微加工技术在毛细管其内部填充折射内芯,两端用单模光纤熔接起来。 [0011] A method of producing a grating-based dynamic capillary Brillouin scattering method, a laser generating a laser beam through the coupler two separated signals, wherein all the way through amplifier enters the first polarization controller, the polarization controller from the first beam output of injection nonlinear fiber, Brillouin scattering is generated in the back-nonlinear fiber; enters the modulator from the coupler further separated signal light beams through the second polarization controller, the output beam is modulated polarized combiner into the nonlinear optical fiber, microwave signal source to the modulator frequency shift in the beam, so that the frequency signals of the two light beams differ Brillouin frequency shift size, the synchronous controller outputs synchronization signals to the laser and modulator , a synchronization signal to ensure that both stimulate Brillouin dynamic grating in the nonlinear optical fiber; the nonlinear optical fiber preform is drawn by a capillary tube formed by the femtosecond micromachining technology is packed inside the capillary core refractive , ends up with a single mode fiber fused.

[0012] 优选的,所述激光器为可调谐单频激光器,所述放大器为功率可调谐的掺饵光纤放大器。 [0012] Preferably, the laser is a single frequency tunable laser, the erbium-doped fiber amplifier as a power amplifier tunable.

[0013] 进一步,所述布里渊动态光栅的栅距通过调节激光器的波长、功率以及微波信号源的频率来实现。 [0013] Further, the Brillouin dynamic pitch of the grating wavelength is achieved by frequency, microwave power, and adjusting the laser source.

[0014] 有益效果:本发明提出的一种基于毛细管的布里渊散射动态光栅产生装置及方法,在毛细管内部填充一定的介质制成非线性光纤,通过控制主激光器的波长、功率和微波信号源的频率来调节布里渊动态光栅的特性;具体的,布里渊动态光栅的公式Λ = λ/(2η),其中Λ是布里渊动态光栅的栅距,λ是栗浦光波长,η为介质折射率,通过调节栗浦光波长λ就可以改变光栅的栅距Λ,从而改变光栅的反射波长,实现光谱的测量;根据布里渊频移公式νΒ= 2ην/λ,其中V 8是布里渊频移,η为介质折射率,V为介质中的声速,λ为栗浦光波长,可以看出,光纤的布里渊频移νΒ与栗浦光波长λ成反比;因此,本发明不仅能够产生布里渊动态光栅,而且能够获得可调谐光栅特性的动态光栅,同时大大降低了电磁干扰,且具有体积小、精度高、成本低廉和结构简单的优 [0014] The beneficial effects: One proposed apparatus and method of the present invention, Brillouin scattering is generated based on the dynamic grating capillary, filled with certain nonlinear optical medium is formed inside the capillary, by controlling the wavelength of the master laser, and the power of the microwave signal source to adjust the frequency characteristic of the Brillouin dynamic grating; specifically, the Brillouin dynamic grating equation Λ = λ / (2η), where Lambda is the Brillouin dynamic pitch of the grating, [lambda] is the wavelength of light chestnut pump, [eta] is refractive index of medium, by adjusting the pump light wavelength [lambda] Li can change the pitch λ of the grating, thereby changing the reflection wavelength of the grating, to achieve a measured spectrum; Brillouin shift formula νΒ = 2ην / λ, where V 8 Brillouin frequency shift, [eta] is the refractive index of medium, V is the velocity of sound in the medium, [lambda] is the wavelength of light chestnut pump, it can be seen, the Brillouin frequency shift νΒ Li pump light wavelength [lambda] and inversely; Accordingly, the present invention is not only capable of producing a Brillouin dynamic grating, and you can obtain the dynamic characteristics of the grating tunable gratings, while significantly reducing electromagnetic interference, and has a small size, high accuracy, low cost and simple structure optimization .

附图说明 BRIEF DESCRIPTION

[0015] 图1为本发明装置的结构示意框图; [0015] The structure of the present invention, FIG. 1 a schematic block diagram of the apparatus;

[0016] 图2为本发明的布里渊动态光栅的激发和探测示意图。 Schematic excitation and detection Brillouin dynamic grating [0016] FIG. 2 of the present invention.

具体实施方式 Detailed ways

[0017] 下面对本发明技术方案进行详细说明,但是本发明的保护范围不局限于所述实施例。 [0017] Next, the technical solution of the present invention in detail, but the scope of the present invention is not limited to the embodiments.

[0018] 实施例: [0018] Example:

[0019] 实施例1:一种基于毛细管布里渊散射动态光栅产生的装置,如图1所示,包括两条光路,一条光路为依次连接的窄线宽可调谐激光器201、耦合器202、掺饵光纤放大器203、第一偏振控制器204和非线性光纤205,另一条从耦合器202出发依次连接第二偏振控制器208、photoline电光调制器209、偏振合束器210回到非线性光纤205。 [0019] Example 1: a capillary device based Brillouin scattering generated dynamically grating shown in Figure 1, comprising two optical paths, one optical path is in turn connected to a narrow linewidth tunable laser 201, a coupler 202, erbium-doped fiber amplifier 203, a first nonlinear optical fiber polarization controllers 204 and 205, 202 from one another are sequentially connected to the second coupler polarization controller 208, photoline electro-optic modulator 209, a polarization beam back to the nonlinear fiber 210 205. 同步控制器206 一端连接窄线宽可调谐激光器201,另一端通过微波信号源207连接photoline电光调制器209。 Synchronization controller 206 has one end connected narrow linewidth tunable laser 201, and the other end connected to an electro-optic modulator 209 photoline microwave signal source 207. 探测激光器211与偏振合束器210相连。 Detection laser 211 and the polarization beam combiner 210 is connected.

[0020] 具体的,本实施例中的非线性光纤205是由精密石英毛细管由预制体拉制而成,其石英砂的纯度约为99.999%,毛细管的外径为120 μ m,内径10 μ m,长度为10m,通过飞秒微加工技术在毛细管其内部填充折射内芯,两端用单模光纤熔接起来,形成结构稳固的高非线性低双折射液芯光纤,其中,折射内芯为四氯化碳。 [0020] Specifically, examples of the nonlinear fiber 205 of the present embodiment is composed of precision drawn quartz capillary formed by the preform, the purity was about 99.999% quartz sand, the capillary outer diameter of 120 μ m, an inner diameter of 10 μ m, a length of 10m, femtosecond micromachining techniques refractive packed inside the capillary inner core, both ends of single mode fiber fused to form a solid structure of highly nonlinear low birefringence liquid core optical fiber, wherein the inner core is a refractive carbon tetrachloride.

[0021] 上述装置的光栅产生方法为,窄线宽可调谐激光器201设置输出波长为1550nm,功率为5dBm,其输出的光经耦合器202分出两路信号,其中50 %的光从一个端口输出进入掺令耳光纤放大器203的输入端,最大输出功率30dBm,设置输出为25dBm,被掺t耳光纤放大器203放大后的信号经第一偏振控制器204进入到非线性光纤205中,在非线性光纤205中产生背向布里渊散射信号;经耦合器202分出的另一路50%的输出的信号经第二偏振控制器208进入到photoline电光调制器209,被调制的信号经偏振合束器210进入非线性光纤205中产生布里渊动态光栅。 Grating [0021] The generation method for the apparatus, narrow linewidth tunable laser 201 is provided as an output wavelength of 1550 nm, 5dBm of power, the output of the optical coupler 202 through the two separated signals, wherein 50% of the light from one port doped into the ear so that the output of the input of fiber amplifier 203, the maximum output power of 30dBm, 25dBm is provided to the output, it is t-doped fiber amplifier 203 behind the ear of the amplified signal via a first polarization controller 204 into the nonlinear optical fiber 205 in the non- linear optical fiber 205 back produced Brillouin scattering signal; a second polarization controller signal output from the other 50% of the way through the coupler 202 is separated into photoline 208 electro-optical modulator 209, polarization modulated combined signal nonlinear fiber 210 enters beam splitter 205 generates Brillouin dynamic grating. 由于布里渊动态光栅本质上是由相干声波场激发的折射率光栅,一般是栗浦光I和栗浦光2,其频率差等于布里渊频移以相同的偏振态(X偏振)从光纤两端注入光纤,通过受激布里渊散射效应激发出相干声波场,形成布里渊动态光栅,探测信号光以I偏振态注入光纤,就可以被布里渊动态光栅反射形成反射信号。 Since the refractive index grating is excited by a coherent acoustic field on the Brillouin grating dynamic nature, typically Li Li pump light and the pump light I 2 which is equal to the frequency difference between the Brillouin frequency shift in the same polarization state (X polarization) from the ends of the fiber injection fiber, excited by a coherent acoustic field stimulated Brillouin scattering, Brillouin dynamic grating is formed, the light detection signal I to the polarization state of the optical fiber injection, it may be reflected dynamic grating reflector formed Brillouin signal. 如图2所示,本实施例中的栗浦光I信号是由可调谐激光器201经耦合器202分出的进入掺饵光纤放大器203中的信号,栗浦光2信号是由可调谐激光器201经耦合器202分出进入第二偏振控制器208,再经电光调制器209移频后的信号,由于非线性光纤205在1550nm栗浦信号的布里渊频移为10.91GHz,所以首先设置微波信号源207的频率为10.91GHz,并做一定的微调,使得从栗浦光2的信号频率小于栗浦光I信号的频率10.91GHz,微波信号源207产生的微波信号驱动电光调制器209,同步控制器206产生的控制信号驱动可调谐激光器201和微波信号源207,并将同步控制器206设置为内同步,这样在非线性光纤205中产生布里渊动态光栅。 2, the present embodiment chestnut pump optical I signals embodiment is a tunable laser 201 is entered 202 separated coupler doped signal fiber amplifier 203 of the bait, Li pump light 2 signal is generated by a tunable laser 201 via a coupler 202 It was separated into a second polarization controller 208, and then the electro-optic modulator 209 frequency-shifted signal, since the nonlinear optical fiber 205 Pu Li 1550nm Brillouin frequency shift signal is 10.91GHz, so the first microwave signal source 207 is provided frequency of 10.91GHz, and to do some fine tuning, such that the frequency is less than Li pump light I signal from Li pump optical signal frequency 2 is 10.91GHz, the control signal is a microwave signal for driving the electro-optic modulator microwave signal source 207 generates 209, the synchronization controller 206 generates a driving 201 tunable laser source 207 and the microwave signal, and synchronizes to the synchronization controller 206, which generates Brillouin dynamic grating in the nonlinear optical fiber 205. 通过调节可调谐激光器201的栗浦波长和微波信号源207的频率,可以获得可调谐栅距的动态光栅,相比于目前已有固定栅距的动态光栅技术,该发明可以获得可调谐栅距的动态光栅。 By adjusting the frequency of the tunable laser 201 and the wavelength of the microwave signal Pu Li source 207 can be obtained dynamically tunable grating pitch, and there are fixed compared to the grating pitch of dynamic technology, the invention can be obtained tunable pitch dynamic grating. 如果利用探测激光器211发出的信号光经偏振合束器210进入非线性光纤205中进行扫描,就可以始终获得高效激发的布里渊动态光栅。 If the light is scanned through a polarization beam enters the nonlinear optical fiber 205, 210 by the signal of the probe laser 211, you can always obtain a Brillouin dynamic grating efficient excitation.

[0022] 实施例2:与实施例1装置相同,不同之处在于:本实施例的非线性光纤205的载体毛细管的外径为110 μ m,内径6 μ m,长度为8m,通过飞秒微加工技术在毛细管其内部填充体积50:50的四氯化碳和二硫化碳的混合液体。 [0022] Example 2: The same apparatus as in Example 1, except that: the nonlinear optical carrier 205 according to the present embodiment of the capillary outer diameter of 110 μ m, an inner diameter of 6 μ m, a length of 8m, femtosecond micromachining the mixed liquid inside the capillary fill volume of carbon tetrachloride and carbon disulfide 50:50. 非线性光纤205在1550nm栗浦信号的布里渊频移为11.21GHz,所以首先设置微波信号源207的频率为11.21GHz,并做一定的微调,使得栗浦光2比栗浦光I的信号频率小11.21GHz,这样可以同样获得可调谐栅距的动态光栅。 In the nonlinear optical fiber 205 Pu Li 1550nm Brillouin frequency shift signal is 11.21GHz, so the first set frequency of the microwave signal source 207 is 11.21GHz, and to do some fine tuning, such that the optical pump signal frequencies Oguri pump light I 2 ratio of Li 11.21GHz , so that the same can be obtained dynamically tunable grating pitch.

[0023] 实施例3:与实施例1装置相同,不同之处在于:本实施例的非线性光纤205的载体毛细管的外径为95 μ m,内径2 μ m,长度为5m,通过飞秒微加工技术在毛细管其内部填充体积石墨烯。 [0023] Example 3: The same apparatus as in Example 1, except that: the nonlinear optical carrier 205 according to the present embodiment of the capillary outer diameter of 95 μ m, an inner diameter of 2 μ m, a length of 5m, femtosecond micromachining the capillary fill volume graphene therein. 非线性光纤205在1550nm栗浦信号的布里渊频移为12.08GHz,所以首先设置微波信号源207的频率为12.08GHz,并做一定的微调,使得栗浦光2比栗浦光I的信号频率小12.08GHz,这样可以同样获得可调谐栅距的动态光栅。 In the nonlinear optical fiber 205 Pu Li 1550nm Brillouin frequency shift signal is 12.08GHz, so the first set frequency of the microwave signal source 207 is 12.08GHz, and to do some fine tuning, such that the optical pump signal frequencies Oguri pump light I 2 ratio of Li 12.08GHz , so that the same can be obtained dynamically tunable grating pitch.

Claims (10)

  1. 1.一种基于毛细管的布里渊散射动态光栅产生装置,其特征在于:包括两条光路,一条光路为依次连接的激光器、耦合器、放大器、第一偏振控制器和非线性光纤,另一条从所述耦合器出发依次连接第二偏振控制器、调制器、偏振合束器最后回到非线性光纤,还包括同步控制器,所述同步控制器与激光器相连的同时通过微波信号源连接所述调制器;所述非线性光纤是以毛细管为载体的光纤,所述毛细管内部填充有折射内芯。 A generating apparatus based on Brillouin scattering grating dynamic capillary, characterized by: comprising two optical paths, an optical path of the laser, a coupler, an amplifier, and a first nonlinear optical fiber polarization controllers are sequentially connected, the other starting sequentially connected to the second polarization controller, a modulator, a polarization beam combiner and finally back to the nonlinear optical fiber, further comprising a synchronization controller, while the synchronization controller coupled to the laser source connected to the microwave signal from the coupler said modulator; capillary said nonlinear optical fiber is an optical fiber as the carrier, the interior of the capillary tube is filled with a refractive core.
  2. 2.根据权利要求1所述的基于毛细管的布里渊散射动态光栅产生装置,其特征在于:所述毛细管为石英毛细管。 2. Generate according to claim 1, based on Brillouin scattering grating dynamic capillary apparatus, wherein: the capillary is a quartz capillary.
  3. 3.根据权利要求1所述的基于毛细管的布里渊散射动态光栅产生装置,其特征在于:所述折射内芯为四氯化碳、二硫化碳及石墨烯中的一种或几种。 The generating means based on the dynamic grating capillary Brillouin scattering according to claim 1, characterized in that wherein: the refractive core is one or more of carbon tetrachloride, carbon disulfide, and graphene.
  4. 4.根据权利要求1或2所述的基于毛细管的布里渊散射动态光栅产生装置,其特征在于:所述毛细管的内径范围为2〜10 μ m。 4. Generate according to claim 1 or claim 2 is based on a dynamic grating capillary Brillouin scattering device, wherein: an inner diameter range of the capillary is 2~10 μ m.
  5. 5.根据权利要求1所述的基于毛细管的布里渊散射动态光栅产生装置,其特征在于:还包括与偏振合束器连接的探测激光器。 The generating means based on the dynamic grating capillary Brillouin scattering according to claim 1, characterized in that claim: further comprising detecting the laser is connected to the polarization beam combiner.
  6. 6.一种基于毛细管的布里渊散射动态光栅产生方法,其特征在于:激光器产生激光经親合器分出两路光束信号,其中一路经放大器放大后进入第一偏振控制器中,从第一偏振控制器输出的光束注入非线性光纤中,在非线性光纤中产生背向布里渊散射;从耦合器分出的另一路光束信号经第二偏振控制器进入调制器,被调制后的输出光束经偏振合束器进入非线性光纤中,微波信号源对调制器中的光束进行移频,使得两束光路信号的频率相差光纤布里渊频移大小,同步控制器输出的同步信号分别给激光器和调制器,保证两者信号同步,在非线性光纤中激发布里渊动态光栅;所述非线性光纤是由预制体拉制而成的毛细管,通过飞秒微加工技术在毛细管其内部填充折射内芯,两端用单模光纤熔接起来。 A dynamically generated based on Brillouin scattering grating capillary method, comprising: a laser generating a laser device by affinity two separated signal beam, wherein all the way through amplifier enters the first polarization controller, from a polarization controller output light beam is injected in the nonlinear optical fiber, Brillouin scattering is generated in the back-nonlinear fiber; the other signal path of the beam entering the coupler is separated from the modulator through the second polarization controller, after being modulated output beam through a polarization beam enters the nonlinear optical fiber, microwave signal source to the modulator frequency shift in the beam, so that the frequency signals of the two light beams differ Brillouin frequency shift magnitude, the synchronization signals output from the synchronization controller to the laser and the modulator, to ensure that both signal synchronization, stimulate Brillouin dynamic grating in the nonlinear optical fiber; the nonlinear optical fiber preform is drawn by a capillary tube formed by the femtosecond micromachining techniques inside the capillary refractive filled inner core, both ends of single mode fiber fused together.
  7. 7.根据权利要求6所述的基于毛细管的布里渊散射动态光栅产生方法,其特征在于:所述毛细管为石英毛细管。 The generating method based on the Brillouin scattering grating dynamic capillary claim 6, characterized in that wherein: the capillary is a quartz capillary.
  8. 8.根据权利要求6所述的基于毛细管的布里渊散射动态光栅产生方法,其特征在于:所述折射内芯为四氯化碳、二硫化碳及石墨烯中的一种或者几种的混合物。 Generating method according to claim 6, based on the Brillouin scattering dynamic capillary grating, wherein: said inner core as a refractive tetrachloride, carbon disulfide, and graphene, or a mixture of several.
  9. 9.根据权利要求6所述的基于毛细管的布里渊散射动态光栅产生方法,其特征在于:所述激光器为可调谐单频激光器,所述放大器为功率可调谐的掺饵光纤放大器。 Generating method according to claim 6, based on the Brillouin scattering dynamic capillary grating, wherein: the laser is a single frequency tunable laser, the erbium-doped fiber amplifier as a power amplifier tunable.
  10. 10.根据权利要求6所述的基于毛细管的布里渊散射动态光栅产生方法,其特征在于:所述布里渊动态光栅的栅距通过调节激光器的波长、功率以及微波信号源的频率来实现。 10. dynamically generated based on Brillouin scattering grating capillary method of claim 6, wherein: said Brillouin dynamic pitch of the grating wavelength is achieved by frequency, microwave power, and adjusting the laser signal source .
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