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Numéro de publicationCN105067114 A
Type de publicationDemande
Numéro de demandeCN 201510424163
Date de publication18 nov. 2015
Date de dépôt17 juil. 2015
Date de priorité17 juil. 2015
Numéro de publication201510424163.7, CN 105067114 A, CN 105067114A, CN 201510424163, CN-A-105067114, CN105067114 A, CN105067114A, CN201510424163, CN201510424163.7
Inventeurs张旭婷, 蔡志坚, 吴建宏
Déposant苏州大学
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes:  SIPO, Espacenet
Multi-wavelength external cavity laser emitter used for inhibiting Raman spectrometer fluorescence
CN 105067114 A
Résumé
The invention discloses a multi-wavelength external cavity laser emitter used for inhibiting Raman spectrometer fluorescence. The emitter employs a power supply switching circuit to connect with more than two laser diodes, and drive the laser diodes to independently connect and disconnect; each laser diode outputs a collimated light beam through a corresponding collimating lens; an angle delta is preset between adjacent collimated light beams. All the collimated light beams are all finally diffracted through a same raster, and then form output beams which are directly outputted from different diffraction angles, and diffraction beams which return to the interior of corresponding laser diodes along original paths to take part in resonant cavity inner mode competition; the output beams are finally gathered by a fiber coupling lens to a fiber combiner to perform wavelength output. The emitter employs a circuit to switch wavelength output, eliminates the unreliability and possible introduced errors of normal mechanical regulation, makes a tuning structure simpler and more stable, guarantees the high stability of an output wavelength, and the strong repeatability of wavelength output in real operation, and substantially improves tuning precision.
Revendications(5)  Langue du texte original : Chinois
1.一种用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其特征在于包括: 准直激光发射组,其包括二个以上的准直激光发射装置,每个准直激光发射装置均包含一激光二极管(I)和一准直透镜(2),且相邻两个准直激光发射装置发出的准直光束之间预设有夹角δ ; 光栅(3),其布置于前述各准直激光发射装置的准直光束出射路径上构成外腔,各准直光束经该光栅(3)衍射后以不同衍射角形成直接出射的输出光束,以及沿原路返回相应激光二极管(I)内部参与谐振腔内部模式竞争的衍射光束; 光纤合路输出装置,包括光纤親合透镜(4)和光纤合路器(5),所述光纤親合透镜(4)用于将经由前述光栅(3)出射的输出光束汇聚至光纤合路器(5)进行波长输出; 控制器¢),包含连接并驱动各激光二极管(I)独立通断的电源切换电路。 External cavity multi-wavelength laser emitting means 1. A method for inhibiting the fluorescence Raman spectroscopy, comprising: a collimated laser emitting group including two or more collimated laser emitting apparatus, each of the collimated laser emitting means contains a laser diode (I) and a collimator lens (2), and has an angle δ adjacent the collimated light beam between the two pre-collimating the emitted laser emitting apparatus; grating (3), which is arranged in the aforementioned each collimated laser emitting apparatus collimated beam constituting the outer chamber on the radio path, each collimated beam through the grating (3) after diffraction at different diffraction angles formed directly emitted output beam, and along the same route to return the corresponding laser diode (I ) to participate in the internal cavity of the internal model of competition diffracted beam; optical fiber combiner output devices, including fiber affinity lens (4) and optical combiner (5), the optical fiber affinity lens (4) for the preceding raster via (3) the output beam emitted convergence to optical fiber combiner (5) for wavelength output; control ¢), it contains the connection and driving each laser diode (I) independent on-off power switching circuit.
2.根据权利要求1所述的用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其特征在于所述光栅(3)为闪耀光栅,各准直光束经该光栅(3)衍射后均可形成直接出射的零级反射光,以及沿原路返回相应激光二极管(I)内部参与谐振腔内部模式竞争的一级衍射光。 The external cavity multi-wavelength laser emitting means for suppressing fluorescence Raman spectrometer according to claim 1, characterized in that said grating (3) is a blazed grating, each of the collimated light beam through the grating (3) after diffraction zero-order reflected light can be formed directly emitted, as well as along the same route to return the corresponding laser diode (I) to participate in the internal cavity of an internal model of competition diffracted light.
3.根据权利要求1或2所述的用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其特征在于所述夹角δ满足:0° < δ < 10°。 3. The external cavity multi-wavelength laser emitting means for inhibiting Raman fluorescence of a claim or 2, wherein said angle [delta] satisfies: 0 ° <δ <10 °.
4.根据权利要求1所述的用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其特征在于所述光纤耦合透镜(4)的数量与激光二极管(I)的数量一致,且每个光纤耦合透镜(4)均对应一路所述光栅(3)的输出光束。 4. The external cavity multi-wavelength laser emitting means for inhibiting Raman fluorescence of claim 1, wherein the number of said optical fiber coupler consistent with the number of lens (4) and a laser diode (I), and each optical fiber coupling lens (4) corresponds the way the grating (3) the output beam.
5.根据权利要求3所述的用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其特征在于所述夹角δ为Γ或2°。 5. The external cavity multi-wavelength laser emitting means for inhibiting Raman spectroscopy of fluorescence according to claim 3, wherein said angle δ is Γ or 2 °.
Description  Langue du texte original : Chinois
用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置 Multi-wavelength external cavity laser Raman spectrometer for fluorescence emission suppression device

技术领域 TECHNICAL FIELD

[0001] 本发明涉及一种外腔激光发射装置,更具体的说,涉及一种用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置。 [0001] The present invention relates to an external cavity laser emitting devices, and more particularly, relates to a multi-wavelength external cavity laser device for emitting fluorescence suppressed Raman spectroscopy.

背景技术 Background technique

[0002]目前,拉曼光谱仪在现场检测、毒品分析、农药检测等领域有着非常广泛的应用。 [0002] Currently, on-site detection of Raman spectroscopy, drug analysis, pesticide detection and other fields has a very wide range of applications. 然而,在对农药、毒品、爆炸物等进行检测的过程中,拉曼光谱受到强荧光干扰。 However, in the process of pesticides, drugs, explosives were detected in Raman spectroscopy by the strong fluorescence interference. 拉曼光强度远小于荧光强度以至于被荧光淹没从而无法检测到拉曼光谱。 Raman intensity is much smaller than the fluorescence intensity of fluorescence that is submerged and thus can not detect the Raman spectrum. 因此,为了能高效地检测拉曼光谱必须抑制荧光。 Therefore, in order to efficiently detect Raman fluorescence must be suppressed.

[0003] 现阶段,抑制荧光的方法有很多种,主要采用的是基线校正。 There are many [0003] At this stage, suppress fluorescence method is mainly used in baseline correction. 基线校正即通过特定的算法拟合出光谱图中的荧光背景并将其扣除。 Baseline correction algorithm that is fitted by a specific spectrum fluorescent background and is subtracted. 由于存在拟合误差,基线校正不适用于荧光背景比较复杂的情况,会存在一些人为失真。 Due to the fitting-case error, baseline correction does not apply to background fluorescence more complex, there will be some artificial distortion.

[0004] 相较而言,现有的便携式拉曼光谱仪采用的多波长移频激发法(SEDRS)能够适应在复杂的背景下有效抑制荧光。 [0004] In contrast, the conventional portable multi-wavelength Raman spectrometer using excitation frequency shift method (SEDRS) able to adapt in a complex background effectively suppress fluorescence. 其依据的原理是:由于荧光波长不会随着激发光波长改变而改变,拉曼光谱峰却会发生明显的位移。 Which is based on the principle: As the fluorescence wavelength of the excitation light wavelength does not change with the change, but it will obviously Raman peak shift occurs. 因此,用两个波长相差微小(一长一短)的光分别激发样品获得两组带有荧光背景的拉曼光谱(同一图中),如图1所示;再将两组带有荧光背景的拉曼光谱进行差分即可消除荧光,得到具有“一正一负”的差值拉曼光谱,如图2所示。 Thus, the tiny difference between the two wavelengths (one long, one short) of light are excited sample obtained with two Raman fluorescence background (the same figure), shown in Figure 1; then the two groups with a fluorescent background Raman spectra of differential fluorescence can be eliminated to give a "positive and negative" difference Raman spectrum, as shown in Fig. 最后,利用相关算法复原拉曼光谱。 Finally, the use of Raman spectroscopy restoration correlation algorithm.

[0005] 多波长移频激发法的关键在于产生多波长拉曼激发光源。 [0005] Multi-wavelength excitation frequency shift key method is to generate a multi-wavelength Raman excitation light source. 以双波长拉曼激发光源为例,目前此类光源主要采用可调谐外腔半导体激光器,其利用光栅作为反馈元件,通过转动光栅实现波长调谐。 In dual-wavelength Raman excitation light source, for example, it is currently the main source of such tunable external cavity semiconductor laser, which utilizes grating as a feedback element to achieve the wavelength tuning by rotating the grating. 如图3所示为目前常见的可调谐外腔半导体激光器示意图,其中激光二极管I输出的光经过准直透镜2入射至光栅3上,一级衍射光反射回激光二极管I中参与模式竞争实现单纵模输出;绕预定支点旋转光栅3—定角度δ,使得入射光的衍射角从图中Θ I变为Θ 2,根据光栅衍射公式“2d.sin Θ = m.λ ”,可知相应的输出波长λ也发生了变化。 Figure 3 shows the current common tunable external cavity semiconductor laser schematic, wherein the output of the laser diode I light through the collimator lens 2 is incident to the grating 3, first-order diffracted light reflected back into the laser diode I participate in the competition to achieve a single mode longitudinal mode output; rotating grating around a predetermined fulcrum 3- given angle δ, so that the diffraction angle of the incident light from the figure becomes Θ I Θ 2, according to the diffraction grating formula "2d.sin Θ = m.λ", we can see the corresponding output wavelength λ also changed.

[0006] 改变一级衍射光波长即可实现波长调节。 [0006] changing a wavelength of light diffracted wavelength tuning can be realized. 由于存在机械移动部件(光栅3的转动机构),该方案具有调谐结构复杂,稳定性差,输出波长重复性弱、多波长切换精度低,调节繁琐等缺点。 Because of mechanical moving parts (rotating mechanism grating 3), the program has a complex structure tuning, stability is poor, weak output wavelength repeatability, low multi-wavelength switching precision, tedious adjustment and other shortcomings.

发明内容 SUMMARY

[0007] 本发明目的是:提供一种用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其基于移频激发原理,能够克服已知激光发射装置调谐结构复杂,稳定性差,输出波长重复性弱、多波长切换调节不便的缺点。 [0007] object of the present invention are: to provide an external cavity multi-wavelength Raman laser emitting means for suppressing fluorescence, excitation wavelength shift frequency based on the principle of laser emitting means to overcome the known complexity of tuning structures, poor stability, output repeatability weak, multi-wavelength switching regulator inconvenient shortcomings.

[0008] 本发明的技术方案是:一种用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置,其特征在于包括: [0008] aspect of the present invention is: A multi-wavelength external cavity laser emitting apparatus Raman spectrometer for fluorescence suppression, comprising:

[0009] 准直激光发射组,其包括二个以上的准直激光发射装置,每个准直激光发射装置均包含一激光二极管和一准直透镜,且相邻两个准直激光发射装置发出的准直光束之间预设有夹角δ ; [0009] The collimated laser emitting group including two or more collimated laser emitting apparatus, each of the collimated laser emission devices comprises a laser diode and a collimating lens, and two adjacent collimated laser emitting means emit preset between a collimated beam has an angle δ;

[0010] 光栅,其布置于前述各准直激光发射装置的准直光束出射路径上构成外腔,各准直光束经该光栅衍射后以不同衍射角形成直接出射的输出光束,以及沿原路返回相应激光二极管内部参与谐振腔内部模式竞争的衍射光束; [0010] grating, which is arranged in an External Cavity collimated beam exit path preceding collimated laser emitting apparatus, each collimated beam through the grating after diffraction at different diffraction angles formed directly emitted output beam, and along the same route returns the corresponding laser diode resonator internal mode of internal competition to participate in the diffracted beam;

[0011] 光纤合路输出装置,包括光纤親合透镜和光纤合路器,所述光纤親合透镜用于将经由前述光栅出射的输出光束汇聚至光纤合路器进行波长输出; [0011] fiber combiner output devices, including fiber affinity lens and optical combiner, the optical fiber affinity lens for convergence via said grating to exit the fiber output beam combiner output wavelength;

[0012] 控制器,包含连接并驱动各激光二极管独立通断的电源切换电路。 [0012] controller, comprising connecting and driving the laser diode on and off independently of the power switching circuit.

[0013] 进一步的,本发明中所述光栅优选为闪耀光栅,各准直光束经该光栅衍射后均可形成直接出射的零级反射光,以及沿原路返回相应激光二极管内部参与谐振腔内部模式竞争的一级衍射光。 [0013] Further, the present invention is preferably in the grating blazed gratings, each collimated beam by the diffraction grating can be formed after the zero-order reflected light directly emitted, as well as along the same route to return the corresponding laser diode inside the interior cavity resonator participation mode competition first-order diffracted light.

[0014] 进一步的,本发明中所述夹角δ满足:0。 [0014] Further, the present invention, the angle δ satisfies: 0. < δ <10。 <Δ <10. .

[0015] 更进一步的,本发明中所述夹角δ为1°或2°。 [0015] Further, in the present invention, the angle δ is 1 ° or 2 °.

[0016] 进一步的,本发明中所述光纤耦合透镜的数量与激光二极管的数量一致,且每个光纤親合透镜均对应一路所述光栅的输出光束。 [0016] Further, the present invention is consistent with the number of optical fiber coupling lens in the number of laser diode and each fiber affinity lens corresponds way the raster output beam.

[0017] 本发明中涉及的连接并驱动各激光二极管独立通断的电源切换电路是本领域技术人员均可实现的已知技术。 [0017] connection and driving the laser diode on and off independently of the present invention relates to a power switching circuit are known to those skilled in technology can achieve.

[0018] 本发明的工作原理如下: [0018] The present invention works as follows:

[0019] 激光二极管和前端的准直透镜确保准直光束的产生。 [0019] The collimator lens and the laser diode to ensure that the front end of the collimated light beam generated. 相对于光栅而言,各激光二极管均是按预设的角度和入射方位排布,每相邻两个激光二极管经准直透镜射出的准直光束之间均存在夹角I而夹角S的存在保证了各准直光束经光栅衍射后具有不同的衍射角Θ。 With respect to the grating, the laser diode are all preset incident angle and azimuth arrangement, I exist in the angle between each two adjacent laser diodes emitted by the collimator lens and the angle of the collimated beam of S ensure the existence of each collimated beam after diffraction gratings having different diffraction angles Θ. 根据光栅衍射公式“2d.sin Θ =m.λ ”,可知当各准直光束的衍射角Θ不同时,其输出波长也不同。 According to the diffraction grating formula "2d.sin Θ = m.λ", known as the diffraction angle Θ of each collimated beam is not the same, the output wavelength is different.

[0020] 本案中各激光二极管是预先固定的,对于不同波长输出的切换是依靠控制器内的电源切换电路来实现,通过电路的切换使得各激光二极管独立通断,完成各自的波长输出。 [0020] in the case of each laser diode is fixed in advance, to switch to a different wavelength output is to rely on the power controller in the switching circuit is achieved by switching circuit so that each laser diode on and off independently, complete their wavelength output. 当然本案只是拉曼光谱仪的前端激光发射装置,各激光二极管经光栅衍射产生的波长不等的输出光束由光纤合路器收集后,分别激发样品以获得(由拉曼光谱仪内部的感应器检测)多组荧光背景的拉曼光谱,再通过处理器差分运算最终合成出荧光抑制良好的复原拉曼光谱。 Of course, this case is just the tip laser emitting apparatus Raman spectrometer, the wavelength of each laser diode produced by the diffraction grating varying output beam after the fiber is collected by a road, respectively, to excite the sample to obtain (by the Raman spectroscopy to detect internal sensor) a plurality of sets of background fluorescence Raman spectrum, and then finally synthesized by the difference operation processor fluorescence suppressed Raman spectroscopy and recoverable.

[0021] 本发明通过合理调节两个准直激光发射装置(激光二极管和准直透镜)的布局角度和入射方位,即改变S角就能够实现最终输出波长的调谐。 [0021] The present invention properly regulate the two collimated laser emitting device (laser diode and collimator lens) layout and the incident angle of orientation, namely to change the angle S can achieve the ultimate output wavelength tuning.

[0022] 本发明的优点是: [0022] The advantages of the present invention are:

[0023] 本发明旨在提供一种无机械调节部件的结构更为稳固、输出波长更加稳定,且操作更加简单方便的用于拉曼光谱荧光抑制的多波长外腔激光发射装置。 [0023] The present invention aims to provide a non-mechanical structure modulating member more stable, more stable output wavelength and multi-wavelength operation of external cavity laser emitting apparatus is more easy for the Raman spectrum of the luminescent inhibition. 本发明相比现有的利用转动式光栅(机械调节部件)实现波长调谐的外腔半导体激光器而言,其具有如下优势: The present invention enables use compared to conventional rotary grating (mechanical regulating member) wavelength tunable external cavity semiconductor laser is concerned, it has the following advantages:

[0024] I)通过电源切换电路控制实现不同输出波长的切换,无机械调节部件即无需转动光栅,消除了机械调节的不可靠性和可能引入的误差,使得调谐结构更加简单稳固,保证了输出波长的高稳定性,实际操作时波长输出的重复性强,能够大大提高调谐精度; [0024] I) by the power switching circuit controls to achieve different output wavelength switching, no mechanical adjustment without turning the part that is grating, eliminating errors introduced by the unreliability and possible mechanical adjustment, making the structure more simple and stable tuning to ensure that the output high wavelength stability, the actual operation of the output wavelength repeatability, can greatly improve the tuning accuracy;

[0025] 2)通过电源切换电路控制实现不同输出波长的切换,可方便、快速切换波长,操作更加简单,能够节约工作时间,提高工作效率; [0025] 2) through the switching circuit controls the switching power supply to achieve different output wavelength can be easily, quickly switch wavelengths, the operation more simple, it can save time and improve efficiency;

[0026] 3)通过光栅外腔反馈实现单纵模输出,线宽< 0.2nm。 [0026] 3) through grating external cavity feedback to achieve single longitudinal mode output, line width <0.2nm.

[0027] 4)本发明使用同一块光栅给多个激光二极管做反馈,而不是一个光栅对应一个激光二极管,故反馈结构简单,能够节约制造成本。 [0027] 4) The present invention is used with a plurality of laser diodes for the grating as feedback rather than a raster corresponding to a laser diode, so that the feedback structure is simple, the manufacturing cost can be saved.

附图说明 BRIEF DESCRIPTION

[0028] 下面结合附图及实施例对本发明作进一步描述: [0028] below in conjunction with the accompanying drawings and the embodiment of the present invention is further described:

[0029]图1为两组波长的激发光未差分前的原始拉曼光谱示意图; [0029] FIG. 1 is a two excitation wavelength of light is not the difference before the original schematic Raman spectroscopy;

[0030](图中实线为短波长激发拉曼曲线,虚线为长波长激发拉曼曲线) [0030] (solid line short wavelength Raman excitation curve, the dotted line for the long-wavelength Raman excitation curve)

[0031] 图2为图1中两组波长的激发光经差分后获得的差分拉曼光谱图; [0031] FIG. 2 is a difference in the Raman spectra of two excitation wavelengths of light 1 obtained after differentially;

[0032] 图3为现有的可调谐外腔半导体激光器示意图; [0032] FIG. 3 is a conventional tunable external cavity semiconductor lasers schematic;

[0033] 图4为本发明的结构示意图: [0033] FIG. 4 a schematic view of the structure of the present invention:

[0034] 图中:1、激光二极管;2、准直透镜;3、光栅;4、光纤親合透镜;5、光纤合路器;6、 [0034] Fig: 1, a laser diode; 2, a collimator lens; 3, grating; 4, fiber affinity lens; 5, an optical fiber combiner; 6,

控制器。 Controller.

具体实施方式 detailed description

[0035] 实施例:结合图4所示为本发明用于拉曼光谱仪荧光抑制的多波长外腔激光发射装置的一种具体实施例,具体的说它是一种双波长外腔激光发射装置,由准直激光发射组、光栅、光纤合路输出装置和控制器共同组成。 [0035] Example: Combining present invention is shown in Figure 4 for a multi-wavelength external cavity laser emitting apparatus fluorescence suppressed Raman spectroscopy particular embodiment, specifically that it is a dual-wavelength external cavity laser emitting device by collimated laser transmitter group, gratings, optical combiner output device and a controller composed.

[0036] 本实施例中的准直激光发射组由二个准直激光发射装置组成,每个准直激光发射装置均由一激光二极管I和一设置在激光二极管I前端的准直透镜2构成,且相邻两个准直激光发射装置发出的准直光束之间预设有夹角δ,0° < δ <10°,通常设置为1°或 [0036] In this example of embodiment collimated laser emitted from the two groups collimated laser emitting apparatus, each collimated laser emitting a laser diode device by the I and a collimator lens disposed in front of the laser diode 2 constituting the I and two adjacent [delta] is preset angle between the collimated beam emitting device emitted collimated laser, 0 ° <δ <10 °, typically set to 1 ° or

2° ο 2 ° ο

[0037] 本实施例中所述光栅3采用的是反射式衍射的闪耀光栅,其布置于前述两个准直激光发射装置的准直光束出射路径上构成外腔,各准直光束经该光栅3衍射后以不同衍射角形成直接出射的零级反射光,以及沿原路返回相应激光二极管I内部参与谐振腔内部模式竞争的一级衍射光。 [0037] In this embodiment the grating 3 uses a reflective diffraction grating blazed arranged to constitute the outer chamber collimated beam exit path of the preceding two collimated laser emitting apparatus, each collimated beam through the grating 3 diffracted in different diffraction angles formed zero order reflected light directly emitted, as well as along the same route to return the corresponding laser diode I participate in the internal cavity of an internal model of competition diffracted light.

[0038] 本实施例中所述光纤合路输出装置由光纤耦合透镜4和光纤合路器5构成,所述光纤耦合透镜4用于将经由前述光栅3出射的零级反射光束汇聚至光纤合路器5 (Y型光纤)进行波长输出;所述光纤耦合透镜4的数量也为两个,每个光纤耦合透镜4均对应一路所述光栅3的零级反射光束。 [0038] In this embodiment of the optical fiber combiner output means by a fiber-coupled fiber combiner lens 4 and 5 constitute the optical fiber coupling lens 4 for gathering together via optical fiber to the preceding three grating zero order reflected light beam emitted Road is 5 (Y-type fiber) wavelength output; the number of the optical fiber coupler lens 4 for two, each fiber coupling lens 4 corresponds grating 3 along the zero order reflected beam.

[0039] 本实施例中所述控制器6内部设有连接并驱动各激光二极管I独立通断的电源切换电路。 [0039] The present embodiment, the controller 6 is connected with internal and driving each laser diode I independent on-off switching power supply circuit.

[0040] 本发明的工作原理如下: [0040] The present invention works as follows:

[0041] 激光二极管I和前端的准直透镜2确保准直光束的产生。 [0041] Laser diodes I and the front end of the collimator lens 2 to ensure that the collimated beam produced. 相对于光栅3而言,各激光二极管I均是按预设的角度和入射方位排布,本实施例中相邻两个激光二极管I经准直透镜2射出的准直光束之间存在夹角δ,而夹角δ的存在保证了各准直光束经光栅3衍射后具有不同的衍射角Θ,即图4中Θ#Ρ Θ 2,根据光栅衍射公式“2d.sin Θ =m.λ”,可知当各准直光束的衍射角Θ不同时,其输出波长λ也不同。 With respect to the grating 3, the respective laser diode I are by a preset angle and incident azimuth arrangement, two laser diodes Examples I through adjacent between the collimator lens 2 exiting collimated beam angle of the present embodiment exists δ, and the presence of the angle δ ensures each collimated beam after diffraction grating 3 having different diffraction angles Θ, in Figure 4 Θ # Ρ Θ 2, according to the diffraction grating formula "2d.sin Θ = m.λ" , we found that when the diffraction angle Θ of each collimated beam is not the same, the output wavelength λ is different.

[0042] 本案中各激光二极管I是预先固定的,对于不同波长输出的切换是依靠控制器6内的电源切换电路来实现,通过电路的切换使得各激光二极管I独立通断,完成各自的波长输出。 [0042] case each laser diode I is fixed in advance, to switch to a different wavelength output is to rely on the power controller 6 inside the switching circuit is achieved by switching circuit so that each laser diode off I independent, their respective wavelength output. 当然本案只是拉曼光谱仪的前端激光发射装置,各激光二极管I经光栅3衍射产生的波长不等的输出光束由光纤合路器5收集后,分别激发样品以获得(由拉曼光谱仪内部的感应器检测)两组荧光背景的拉曼光谱(可参见图1所示),最后通过处理器差分运算合成获得荧光抑制良好的拉曼光谱(可参见图2所示)。 Of course, this case is just the tip laser emitting apparatus Raman spectrometer, the wavelength of each laser diode I by varying the output beam diffraction grating 3 produced after the optical fiber combiner 5 is collected by, respectively, to excite the sample to obtain (by the Raman spectrometer inside the induction detection) two fluorescence background Raman spectrum (see Figure 1), and finally by the processor obtaining differential operational synthesis inhibition fluorescence good Raman spectra (see Figure 2).

[0043] 本发明通过合理调节两个准直激光发射装置(激光二极管I和准直透镜2)的布局角度和入射方位,即改变S角就能够实现最终输出波长的调谐。 [0043] The present invention properly regulate the two collimated laser emitting device (laser diode I and the collimator lens 2) the layout and the incident angle of orientation, namely to change the angle S can achieve the ultimate output wavelength tuning.

[0044]当然上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。 [0044] Of course, the above embodiments are for illustrative purposes and characteristics of the technical concept of the present invention, the purpose is to make people familiar with the art to understand the present invention and the scope of protection according to implement, and not to limit the present invention. 凡根据本发明主要技术方案的精神实质所做的修饰,都应涵盖在本发明的保护范围之内。 Where modifications made according to the spirit of the present invention is mainly technical solution should fall within the scope of the present invention.

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Référencé par
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Classifications
Classification internationaleH01S5/06, G01N21/65, H01S5/14, G01J3/10
Événements juridiques
DateCodeÉvénementDescription
18 nov. 2015C06Publication
16 déc. 2015C10Entry into substantive examination