CN113078546A - 非线性光锁定聚焦模块 - Google Patents
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- H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
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Abstract
本发明涉及非线性光锁定聚焦模块，属于非线性光学领域。本发明提出了一种非线性光锁定聚焦模块，采用波长λ激光在非线性晶体内通过非线性光学效应产生波长Λ的光，用内表面针对波长Λ镀有高反射率膜层的两面镜片形成的共心腔将波长Λ的非线性光锁定在腔内多次反射聚焦于检测点用以增强激光光谱信号，检测点处样品光谱信号可沿共心腔轴向或垂直于轴向探测，该方法可以使光谱信号增强100倍以上。
Description
技术领域
本发明涉及非线性光学，特别涉及非线性光锁定聚焦模块。
背景技术
在铌酸锂、钽酸锂、磷酸钛氧钾(KTP)、磷酸二氢钾(KDP)、偏硼酸钡(BBO)等非线性光学材料中，输入特定波长的激光可通过高次谐波、光学混频等非线性效应产生新的波长的光。这一非线性光学效应目前已被广泛应用，例如：常用的532nm激光一般由Nd:YAG晶体产生的1064nm基频光经过倍频晶体(KTP，LBO，PPLN等)经过非线性效应倍频之后产生532nm激光。
目前，拉曼光谱、激光诱导击穿光谱等技术已广泛应用于分子和原子的定性和定量分析，而针对微量物质的分析受限于信号强度，因而对于微弱信号增强方法的需求越来越迫切。由于信号光强度与激发光功率成正比，提高激发光功率是增加信号强度的有效方法。但增加激光功率意味着更大的激光器体积和重量，散热难度的增加，以及更高的成本。结合非线性光学效应、特殊镀膜光学元件的多次反射激发光聚焦增强模块是有效提升拉曼光谱、激光诱导击穿光谱等信号强度的另一种可能。
发明内容
本发明提出了一种非线性光锁定聚焦模块，采用波长λ激光在非线性晶体内通过非线性光学效应产生波长Λ的光，用内表面针对波长Λ镀有高反射率膜层的第一镜片和第二镜片形成的共心腔将波长Λ的非线性光锁定在腔内多次反射聚焦于检测点用以增强激光光谱信号，检测点处样品光谱信号可沿共心腔轴向或垂直于轴向探测。
本发明的技术方案为：非线性光锁定聚焦模块。
本发明的装置包括：激光器、第一镜片、样品池、非线性晶体、第二镜片、第一表面、第二表面、第三表面、第四表面、探测点。第一镜片的第二表面镀有针对波长λ高透射率同时针对波长Λ高反射率的膜层，第二镜片的第三表面镀有针对波长Λ高反射率的膜层。激光器输出波长λ的激光后由第一镜片聚焦于检测点，后在非线性晶体内通过倍频等非线性效应产生波长的光，波长Λ的光由第三表面反射后透射非线性晶体并聚焦于探测点，后经第二表面反射后聚焦于探测点，进入下一个循环。这样，第二表面和第三表面形成以探测点为焦点的共心腔，波长Λ的光在两者之间多次反射，并每次聚焦于探测点。探测点位于样品池内，样品池四面分别有四个窗口片用以透光。其中，垂直于第一镜片和第二镜片组成的共心腔轴向的两片窗口片的两个表面均镀有针对波长Λ高透射率的膜层。同时，非线性晶体垂直于共心腔轴向的两面均镀有针对波长Λ高透射率的膜层。
本发明的有益效果在于：
1.将用于激发样品光谱信号的非线性光锁定在共心腔内，通过多次反射聚焦可将光谱信号强度提升100倍以上；
2.检测点处可以是气态、液态、固态等各种形态的待测样品；
3.信号光可沿第二表面和第三表面组成的共心腔轴向或垂直于该轴向探测。
附图说明
图1为本发明的实施方式的装置结构示意图；
具体实施方式
下面结合附图与实施例对本发明作进一步说明。
本发明的实施方式，装置如图1所示：激光器1、第一镜片2、样品池3、非线性晶体4、第二镜片5、第一表面6、第二表面7、第三表面8、第四表面9、探测点10。第一镜片2的第二表面7镀有针对波长λ高透射率同时针对波长Λ高反射率的膜层，第二镜片5的第三表面8镀有针对波长Λ高反射率的膜层。激光器1输出波长λ的激光后由第一镜片2聚焦于检测点10，后在非线性晶体4内通过倍频等非线性效应产生波长Λ的光，波长Λ的光由第三表面8反射后透射非线性晶体4并聚焦于探测点10，后经第二表面7反射后聚焦于探测点10，进入下一个循环。
这样，第二表面7和第三表面8形成以探测点10为焦点的共心腔，波长Λ的光在两者之间多次反射，并每次聚焦于探测点10。探测点10位于样品池3内，样品池3四面分别有四个窗口片用以透光。其中，垂直于第一镜片2和第二镜片5组成的共心腔轴向的两片窗口片的两个表面均镀有针对波长Λ高透射率的膜层。同时，非线性晶体4垂直于共心腔轴向的两面均镀有针对波长Λ高透射率的膜层。第一镜片2和第二镜片5可分别替换为2-10片镜片组成的镜片组。非线性晶体4在腔内位置可变动，或由多个非线性晶体替代。
样品池3内待测样品可以是气体、液体、固体。待测样品如果是气体或液体，可沿垂直于共心腔轴向流动。待测样品如果是固体则透光两表面需镀有针对波长Λ高透射率的膜层，同时样品池3可省去。
激光器1可以替换为λ1-λn多输出波长的激光器组，激光器组输出的λ1-λn波长激光在非线性晶体4内通过倍频、混频、合频、差频、参量振荡等非线性过程产生波长Λ的光，第二表面7替换为针对波长Λ高反射率同时针对波长λ1-λn高透射率的膜层。非线性晶体4材料可以是铌酸锂、钽酸锂、磷酸氧鈦鉀(KTP)、磷酸二氫鉀(KDP)、偏硼酸钡(BBO)等。
非线性晶体4中产生的波长Λ的光在第二表面7和第三表面8之间多次反射，每次均聚焦于探测点10激发样品产生拉曼光、等离子体荧光等信号光。信号光可沿第二表面7和第三表面8组成的共心腔轴向或垂直于该轴向探测，如图1箭头所示。样品池3可沿第二表面7和第三表面8组成的共心腔轴向转动任意角度。
第二表面7和第三表面8镀膜针对波长Λ反射率99.9％以上，垂直于共心腔轴向的样品池3窗口片表面及非线性晶体4侧面镀膜针对波长Λ透射率99.9％以上。这样，探测点10处拉曼光、等离子体荧光等信号光强度可增强100倍以上。
以上所述，仅是本发明的较佳实施例，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。
Claims (9)
1.非线性光锁定聚焦模块，装置包括：激光器、第一镜片、样品池、非线性晶体、第二镜片、第一表面、第二表面、第三表面、第四表面、探测点，激光器输出波长λ激光在非线性晶体内产生波长Λ的光，第一镜片的第二表面针对波长λ高透射率同时针对波长Λ高反透射率，第二镜片的第三表面针对波长Λ高反透射率，波长Λ的光在第二表面和第三表面形成的共心腔内多次反射聚焦于检测点。
2.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：探测点处的信号光可沿共心腔轴向或垂直于该轴向探测。
3.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：样品池包含探测点并位于共心腔内，样品池垂直于共心腔轴向的窗口片双面镀有针对波长Λ高透射率膜层。
4.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：非线性晶体位于共心腔内，非线性晶体垂直于共心腔轴向的端面镀有针对波长Λ高透射率膜层。
5.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：第三表面和第四表面可针对信号光波长镀对应的高透射率膜层。
6.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：为达到减小探测点处光斑尺寸和提升探测效率的目的，第一镜片和第二镜片可分别替换为2-10片镜片组成的镜片组。
7.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：为达到增加非线性光转化效率的目的，非线性晶体在腔内位置可变动，或由多个非线性晶体替代。
8.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：针对气体或液体样品，可沿垂直于共心腔轴向流动。
9.根据权利要求1所述的非线性光锁定聚焦模块，其特征在于：为达到拓宽非线性光范围的目的，激光器可以替换为λ1-λn(n<20)多输出波长的激光器组，第二表面膜层替换为针对波长Λ高反射率同时针对波长λ1-λn高透射率。
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100201977A1 (en) * | 2007-03-01 | 2010-08-12 | Milan Milosevic | Optical multipass cell for repeated passing of light through the same point |
| CN104568897A (zh) * | 2013-10-29 | 2015-04-29 | 苏州拉曼检测技术有限公司 | 基于腔外谐振腔技术的拉曼光谱增强装置、系统及方法 |
| CN208013077U (zh) * | 2018-03-21 | 2018-10-26 | 黄保坤 | 一种透明样品光散射信号收集装置及相应信号分析装置 |
| CN108801455A (zh) * | 2018-06-08 | 2018-11-13 | 徐州旭海光电科技有限公司 | 一种拉曼光信号激励和收集装置 |
| CN112414992A (zh) * | 2020-11-13 | 2021-02-26 | 苏州灵析精密仪器有限公司 | 拉曼光谱激发增强模块 |
| CN215299775U (zh) * | 2021-04-20 | 2021-12-24 | 苏州灵析精密仪器有限公司 | 非线性光锁定聚焦模块 |
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- 2021-04-20 CN CN202110423590.9A patent/CN113078546A/zh active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100201977A1 (en) * | 2007-03-01 | 2010-08-12 | Milan Milosevic | Optical multipass cell for repeated passing of light through the same point |
| CN104568897A (zh) * | 2013-10-29 | 2015-04-29 | 苏州拉曼检测技术有限公司 | 基于腔外谐振腔技术的拉曼光谱增强装置、系统及方法 |
| CN208013077U (zh) * | 2018-03-21 | 2018-10-26 | 黄保坤 | 一种透明样品光散射信号收集装置及相应信号分析装置 |
| CN108801455A (zh) * | 2018-06-08 | 2018-11-13 | 徐州旭海光电科技有限公司 | 一种拉曼光信号激励和收集装置 |
| CN112414992A (zh) * | 2020-11-13 | 2021-02-26 | 苏州灵析精密仪器有限公司 | 拉曼光谱激发增强模块 |
| CN215299775U (zh) * | 2021-04-20 | 2021-12-24 | 苏州灵析精密仪器有限公司 | 非线性光锁定聚焦模块 |
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