CN103050876A - Linearly polarized laser amplifier - Google Patents
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- CN103050876A CN103050876A CN2013100008583A CN201310000858A CN103050876A CN 103050876 A CN103050876 A CN 103050876A CN 2013100008583 A CN2013100008583 A CN 2013100008583A CN 201310000858 A CN201310000858 A CN 201310000858A CN 103050876 A CN103050876 A CN 103050876A
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- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 7
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 abstract description 15
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 15
- 239000008207 working material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005693 optoelectronics Effects 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002647 laser therapy Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
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Abstract
本发明公开了一种线偏光激光放大器。它包括与入射线偏激光（1）同轴的激光棒（3）和平行的氙灯（6），特别是所述激光棒（3）光轴的一端置有全透射入射线偏激光（1）的检偏器（2）、另一端依次置有1/4波片（4）和全反镜（5）；所述的检偏器（2）为棱镜，或布氏窗片。它既对线偏振激光进行了放大，又使放大效率为现有放大效率的两倍以上，大大地提高了单级放大的效率，解决了弱小信号激光输出放大的难题，还仅在增加一片1/4波片和一片全反镜的条件下，就使一级激光工作物质达到了使用两级激光工作物质方能获得的光放大效果，且还降低了光电成本，大大地减小了激光放大器的空间，极大地提升了激光系统的稳定性。可广泛用于对线偏激光的放大。
The invention discloses a linear polarized laser amplifier. It includes a laser bar (3) coaxial with the incident ray polarized light (1) and a parallel xenon lamp (6), especially one end of the optical axis of the laser bar (3) is equipped with a fully transmitted incident ray polarized light (1) The polarizer (2) and the other end are sequentially provided with a 1/4 wave plate (4) and a total reflection mirror (5); the polarizer (2) is a prism or a Brinell window. It not only amplifies the linearly polarized laser, but also makes the amplification efficiency more than twice that of the existing amplification efficiency, greatly improves the single-stage amplification efficiency, and solves the problem of weak and small signal laser output amplification, and only adds a 1 Under the conditions of /4 wave plate and a full reflection mirror, the first-level laser working material can achieve the light amplification effect that can only be obtained by using two-level laser working material, and it also reduces the cost of optoelectronics and greatly reduces the laser amplifier. The space greatly improves the stability of the laser system. It can be widely used to amplify linearly polarized laser light.
Description
技术领域 technical field
本发明涉及一种激光放大器，尤其是一种线偏光激光放大器。The invention relates to a laser amplifier, in particular to a linearly polarized laser amplifier.
背景技术 Background technique
随着激光技术在军事、工业、医疗等领域的广泛运用，人们对激光的性能也不断地提出了更高的要求，往往希望激光具有线偏振、高光束质量和高能量，如激光雷达需要大功率的调制激光、调Q的激光治疗仪需要大功率的脉冲激光等。然而，欲获得同时具有高能量和高光束质量的线偏振激光，仅靠激光（震荡）器自身来获取一般是很困难的，这是因为同时提高激光器的输出能量和其他指标，如光束发散角、单色性、脉宽、调制性能等的要求是相矛盾的。因此，为了获得性能优良的高能量激光输出，人们常使用激光放大器；其构成为于激光器输出端的光轴上设置激光工作物质——激光棒和其旁平行设置的氙灯，以实现经过光泵浦的作用达到一次激光放大的目的。但是，这种结构的放大器虽有着结构简单、可对前置激光器的输出进行放大的优点，却也存在着激光放大效率低，难以对一些小信号的激光输出进行有效的放大之不足。With the wide application of laser technology in military, industrial, medical and other fields, people continue to put forward higher requirements for the performance of lasers. They often hope that lasers have linear polarization, high beam quality and high energy. For example, laser radar requires large Power modulated lasers and Q-switched laser therapy devices require high-power pulsed lasers, etc. However, in order to obtain a linearly polarized laser with both high energy and high beam quality, it is generally difficult to obtain it only by the laser (oscillator) itself, because the output energy of the laser and other indicators such as the beam divergence angle are increased at the same time , monochromaticity, pulse width, modulation performance and other requirements are contradictory. Therefore, in order to obtain high-energy laser output with excellent performance, people often use a laser amplifier; it is composed of a laser working substance—a laser rod and a xenon lamp arranged in parallel next to it—on the optical axis of the laser output end to achieve optical pumping. The role of the laser to achieve the purpose of amplification. However, although the amplifier with this structure has the advantages of simple structure and can amplify the output of the pre-laser, it also has the disadvantage of low laser amplification efficiency, and it is difficult to effectively amplify the laser output of some small signals.
发明内容 Contents of the invention
本发明要解决的技术问题为克服现有技术中的不足之处，提供一种结构合理，放大效率高的线偏光激光放大器。The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a linearly polarized laser amplifier with reasonable structure and high amplification efficiency.
为解决本发明的技术问题，所采用的技术方案为：线偏光激光放大器包括与入射线偏激光同轴的激光棒和平行的氙灯，特别是，In order to solve the technical problem of the present invention, the adopted technical scheme is: the linear polarized laser amplifier comprises a coaxial laser rod and a parallel xenon lamp with the incident linear polarized laser light, especially,
所述激光棒光轴的一端置有全透射入射线偏激光的检偏器、另一端依次置有1/4波片和全反镜。One end of the optical axis of the laser rod is equipped with an analyzer that fully transmits incident ray polarized laser light, and the other end is sequentially equipped with a 1/4 wave plate and a total reflection mirror.
作为线偏光激光放大器的进一步改进，所述的检偏器为棱镜，或布氏窗片。As a further improvement of the linearly polarized laser amplifier, the analyzer is a prism or a Brinell window.
相对于现有技术的有益效果是，采用在现有的与入射线偏激光同轴的激光棒和平行的氙灯的基础之上，再于激光棒光轴的一端置有全透射入射线偏激光的检偏器、另一端依次置有1/4波片和全反镜的技术方案，既对线偏振激光进行了放大，又使放大效率为现有放大效率的两倍以上，大大地提高了单级放大的效率，解决了弱小信号激光输出放大的难题，还有着仅在增加一片1/4波片和一片全反镜的条件下，就使一级激光工作物质达到了使用两级激光工作物质方能获得的光放大效果的优点，且还降低了光电成本，大大地减小了激光放大器的空间，极大地提升了激光系统的稳定性。Compared with the prior art, the beneficial effect is that on the basis of the existing laser rod coaxial with the incident ray polarized laser and the parallel xenon lamp, a fully transmitted incident ray polarized laser is placed at one end of the optical axis of the laser rod. The technical scheme of polarizing analyzer, 1/4 wave plate and full reflection mirror at the other end in turn, not only amplifies the linearly polarized laser, but also makes the amplification efficiency more than twice that of the existing amplification efficiency, which greatly improves the The efficiency of single-stage amplification solves the problem of weak and small signal laser output amplification, and only adds a 1/4 wave plate and a full reflection mirror to make the first-stage laser working material reach the level of two-stage laser work. The advantages of light amplification effect that can only be obtained by materials, and also reduce the cost of optoelectronics, greatly reduce the space of the laser amplifier, and greatly improve the stability of the laser system.
本发明的实现机理为，于入射线偏激光的传播方向上设置检偏方向与入射线偏激光偏振方向平行的检偏器，从而使输入的入射线偏激光可以完全地通过检偏器。当输入的入射线偏激光通过激光棒时，激光棒在氙灯的光泵浦作用下，处于粒子数反转状态，由于入射线偏激光的频率和放大介质——激光棒的增益谱线相重合，故激光棒激发态上的粒子在外来信号的作用下产生了强烈的受激辐射，这种辐射叠加到入射线偏激光上而使其得到了放大。放大后的入射线偏激光通过1/4波片后经过全反镜的反射再次通过1/4波片，即相当于放大后的入射线偏激光经过一次1/2波片，使得放大后的入射线偏激光的偏振面旋转了90度，使其偏振方向与输入时的入射线偏激光的偏振方向垂直。当其再次通过激光棒进行二次放大后，二次放大后的入射线偏激光已不能再通过检偏器，只能被检偏器反射输出，从而得到已被放大了两倍以上的入射线偏激光输出。The realization mechanism of the present invention is that an analyzer whose analysis direction is parallel to the polarization direction of the incident line polarized light is arranged in the propagating direction of the incident line polarized light, so that the input incident line polarized light can completely pass through the analyzer. When the input incident ray-polarized laser passes through the laser rod, the laser rod is in the state of particle number inversion under the optical pumping action of the xenon lamp, because the frequency of the incident ray-polarized laser coincides with the gain spectrum of the amplification medium—the laser rod , so the particles in the excited state of the laser rod produce intense stimulated radiation under the action of external signals, and this radiation is superimposed on the incident beam to amplify it. The amplified incident ray polarized light passes through the 1/4 wave plate and then is reflected by the total mirror and passes through the 1/4 wave plate again, which is equivalent to the amplified incident ray polarized light passing through the 1/2 wave plate once, so that the amplified The polarization plane of the incident linearly polarized light is rotated by 90 degrees so that its polarization direction is perpendicular to that of the incident linearly polarized light at input. When it is re-amplified by the laser rod again, the incident ray polarized laser after the second amplification can no longer pass through the analyzer, and can only be reflected by the analyzer to output, so as to obtain the incident ray that has been amplified more than twice Biased laser output.
作为有益效果的进一步体现，检偏器优选为棱镜或布氏窗片，不仅使检偏器的来源较广泛，还便于安装使用。As a further embodiment of the beneficial effect, the analyzer is preferably a prism or a Brinell window, which not only makes the source of the analyzer more extensive, but also facilitates installation and use.
附图说明 Description of drawings
下面结合附图对本发明的优选方式作进一步详细的描述。The preferred modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.
图1是本发明的一种基本结构示意图。Fig. 1 is a kind of basic structure schematic diagram of the present invention.
具体实施方式 Detailed ways
参见图1，线偏光激光放大器的构成如下：Referring to Figure 1, the composition of the linearly polarized laser amplifier is as follows:
入射线偏激光1的传播方向上依次置有对入射线偏激光1全透射的检偏器2、激光棒3、1/4波片4和全反镜5；其中，检偏器2为棱镜（或布氏窗片），激光棒3与入射线偏激光1同轴设置，激光棒3旁置有与其平行的氙灯6。An analyzer 2, a laser rod 3, a 1/4 wave plate 4, and a total reflection mirror 5, which are fully transparent to the incident beam 1, are sequentially arranged in the direction of propagation of the incident beam 1; wherein the analyzer 2 is a prism (or a Brinell window), the laser rod 3 is arranged coaxially with the incident beam 1, and a xenon lamp 6 parallel to the laser rod 3 is placed beside it.
使用时，入射线偏激光1全透射通过检偏器2后，依次经激光棒3、1/4波片4、全反镜5、1/4波片4和激光棒3被两次放大，最后由检偏器2输出放大了的其偏振方向与入射线偏激光1偏振方向垂直的出射线偏激光7。When in use, after the incident linearly polarized laser light 1 is fully transmitted through the analyzer 2, it is amplified twice by the laser rod 3, 1/4 wave plate 4, total reflection mirror 5, 1/4 wave plate 4 and laser rod 3 in sequence, Finally, the amplified outgoing linearly polarized light 7 whose polarization direction is perpendicular to the polarization direction of the incident linearly polarized light 1 is output by the analyzer 2 .
显然，本领域的技术人员可以对本发明的线偏光激光放大器进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若对本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the linearly polarized laser amplifier of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615239A (en) * | 2020-12-15 | 2021-04-06 | 武汉菩济医疗科技有限公司 | Laser magnifier and laser magnifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2901639Y (en) * | 2006-03-23 | 2007-05-16 | 北京工业大学 | Laser pulse four-way amplifier |
| CN101436753A (en) * | 2008-12-26 | 2009-05-20 | 北京工业大学 | Laser cavity external frequency multiplication system |
| CN102621704A (en) * | 2012-03-22 | 2012-08-01 | 北京国科世纪激光技术有限公司 | Four-pass laser amplifying device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2901639Y (en) * | 2006-03-23 | 2007-05-16 | 北京工业大学 | Laser pulse four-way amplifier |
| CN101436753A (en) * | 2008-12-26 | 2009-05-20 | 北京工业大学 | Laser cavity external frequency multiplication system |
| CN102621704A (en) * | 2012-03-22 | 2012-08-01 | 北京国科世纪激光技术有限公司 | Four-pass laser amplifying device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615239A (en) * | 2020-12-15 | 2021-04-06 | 武汉菩济医疗科技有限公司 | Laser magnifier and laser magnifier |
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