技术领域technical field
本发明实施例涉及激光器领域，尤其涉及一种脉宽可调的脉冲型铷蒸气蓝光激光器。Embodiments of the present invention relate to the field of lasers, in particular to a pulse-type rubidium vapor blue laser with adjustable pulse width.
背景技术Background technique
蓝光激光器在激光显示、激光探测、激光通信和光存储方面具有重要应用。目前蓝光激光器有氩离子激光器、氦镉激光器、砷化镓半导体激光器、染料激光器以及光学参量振荡器等。Blue lasers have important applications in laser display, laser detection, laser communication and optical storage. At present, blue lasers include argon ion lasers, helium cadmium lasers, gallium arsenide semiconductor lasers, dye lasers, and optical parametric oscillators.
在有关激光的科学研究和实际应用中，脉冲激光经常被使用，这时会有对激光脉冲宽度调整的需求。现有的技术方法有几种，例如改变调Q式激光器的谐振腔长度，从而改变腔倒空所需要的时间来改变激光脉冲宽度；使用快速光开关从激光束中截取需要的脉冲；使用非线性效应来拉宽或压窄激光脉冲。In the scientific research and practical application of lasers, pulsed lasers are often used, and there will be a need for laser pulse width adjustment. There are several existing technical methods, such as changing the length of the resonant cavity of the Q-switched laser, thereby changing the time required for the cavity to empty to change the laser pulse width; using a fast optical switch to intercept the required pulse from the laser beam; Linear effect to widen or narrow laser pulses.
目前若要获取脉宽可调的脉冲形式的蓝光激光，现有的技术方法面临成本高、操作繁杂、对激光偏振性质有要求、对激光线宽有要求等不便之处。At present, in order to obtain the pulsed blue laser with adjustable pulse width, the existing technical methods face inconveniences such as high cost, complicated operation, requirements on the polarization properties of the laser, and requirements on the laser line width.
发明内容Contents of the invention
本发明实施例提供一种脉宽可调的脉冲型铷蒸气蓝光激光器，具有脉冲宽度、光束模式、偏振模式自由度大的特点，而且输出激光脉冲的宽度可以在较大范围内连续调整。The embodiment of the present invention provides a pulse-type rubidium vapor blue laser with adjustable pulse width, which has the characteristics of large degrees of freedom in pulse width, beam mode, and polarization mode, and the width of the output laser pulse can be continuously adjusted within a wide range.
本发明所述的一种脉宽可调的脉冲型铷蒸气蓝光激光器，其特征在于，其包括泵浦源、铷蒸气池、色散装置，其中泵浦源产生准直、脉冲式的泵浦激光，泵浦激光泵浦铷蒸气池内的铷蒸气，引发铷蒸气的级联激光过程，产生与泵浦激光同轴同向的蓝色激光；经由色散装置返回的准直、脉冲式的调节激光，调节激光与泵浦激光在铷池内部同轴反向传播，通过干扰级联激光过程来调节蓝色激光的脉宽，调节后的蓝色激光被色散装置分离输出。A pulse-type rubidium vapor blue light laser with adjustable pulse width according to the present invention is characterized in that it includes a pump source, a rubidium vapor pool, and a dispersion device, wherein the pump source generates collimated and pulsed pump laser light , the pump laser pumps the rubidium vapor in the rubidium vapor pool, triggers the cascade laser process of the rubidium vapor, and produces a blue laser that is coaxial and in the same direction as the pump laser; the collimated and pulsed adjusted laser that returns through the dispersion device, The adjustment laser and the pump laser propagate coaxially and counter-propagating inside the rubidium cell, and the pulse width of the blue laser is adjusted by interfering with the cascade laser process, and the adjusted blue laser is separated and output by the dispersion device.
所述的蓝光激光器，其特征在于：泵浦源的泵浦激光为单色激光，其波长对准铷原子的52S1/2至52DJ能级双光子吸收跃迁波长，其中能级总角动量J可取物理学允许之值。The blue light laser is characterized in that: the pumping laser of the pumping source is a monochromatic laser, and its wavelength is aligned with the 52 S1/2 to 52 DJ energy level two-photon absorption transition wavelength of the rubidium atom, wherein the energy The total angular momentum J of the stage can take the value allowed by physics.
所述的蓝光激光器，其特征在于，级联激光过程包含一个对于泵浦激光的双光子吸收跃迁过程，实现铷原子的52S1/2至52DJ能级双光子跃迁；其包含一个对应铷原子52DJ至62PJ’能级跃迁的受激辐射过程；其包含一个产生铷原子62PJ’至52S1/2能级跃迁波长的四波混频辐射过程，且此过程为蓝色激光来源；其中能级总角动量J、J’可取物理学允许之值。The blue laser is characterized in that the cascaded laser process includes a two-photon absorption transition process for the pump laser to realize the two-photon transition of the 52 S1/2 to 52 DJ energy level of the rubidium atom; it includes A stimulated emission process corresponding to the 52 DJ to 62 PJ' energy level transition of the rubidium atom; it includes a four-wave mixing that generates the 62 PJ' to 52 S1/2 energy level transition wavelength of the rubidium atom Radiation process, and this process is the source of blue laser; wherein the total angular momentum J, J' of the energy level can take the value allowed by physics.
所述的蓝光激光器，其特征在于，色散装置与已经穿过铷蒸气的泵浦激光光束相遇，且其可将同轴同方向的一束蓝色激光光束与一束泵浦激光光束进行空间分离，色散装置为二向色镜、光栅或棱镜。The blue laser is characterized in that the dispersion device meets the pumping laser beam that has passed through the rubidium vapor, and it can spatially separate a bunch of blue laser beams coaxial and in the same direction from a pumping laser beam , the dispersion device is a dichroic mirror, grating or prism.
所述的蓝光激光器，其特征在于，调节激光为单色激光，其波长对准铷原子的52S1/2至52DJ能级双光子跃迁，其中能级总角动量J可取物理学允许之值；经由色散装置返回的准直、脉冲式的调节激光可由一调节激光光源发出，或由二向色镜反射泵浦激光获得，或由反射镜反射泵浦激光获得。The blue light laser is characterized in that the adjustment laser is a monochromatic laser, and its wavelength is aligned with the two-photon transition of the 52 S1/2 to 52 DJ energy level of the rubidium atom, wherein the total angular momentum J of the energy level can be taken as physical The value allowed by science; the collimated and pulsed adjusted laser light returned by the dispersion device can be emitted by an adjusted laser light source, or obtained by reflecting the pump laser light from a dichroic mirror, or obtained by reflecting the pump laser light from a mirror.
所述的蓝光激光器，其特征在于，调节激光的脉冲相对于泵浦激光脉冲的时间间隔可任意调节。The blue laser is characterized in that the time interval between the pulse of the adjusting laser and the pulse of the pumping laser can be adjusted arbitrarily.
所述的蓝光激光器，其特征在于，于泵浦源与铷蒸气池间设有偏振分束器，于铷蒸气池与色散装置之间设有光隔离器。The blue laser is characterized in that a polarization beam splitter is provided between the pump source and the rubidium vapor cell, and an optical isolator is provided between the rubidium vapor cell and the dispersion device.
所述的一种脉宽可调的脉冲型铷蒸气蓝光激光器在工作时，泵浦激光通过激励铷蒸气发生双光子吸收而在铷原子52DJ能级聚集大量铷原子，52DJ能级的铷原子迅速向较低的空能级62PJ跃迁而产生52DJ-62PJ中红外辐射，此辐射与泵浦光同轴。泵浦光与同轴同向传播的52DJ-62PJ中红外辐射发生四波混频过程而产生蓝色激光，此蓝色激光与泵浦光同轴同向传播，波长对应于铷原子的62PJ至52S1/2跃迁。调节激光沿着通过铷蒸气池之后的泵浦激光原路返回，当调节激光与泵浦激光时间间隔合适，可以使调节激光的脉冲前半段与泵浦激光脉冲的后半段在铷蒸气中相遇，此相遇会抑制该泵浦激光脉冲后半段产生蓝色激光。在不调整泵浦激光脉冲宽度的条件下，通过调整调节激光的返回时间，可以改变输出蓝色激光的脉冲宽度。蓝色激光被色散装置分离后输出。When the pulsed-type rubidium vapor blue light laser with adjustable pulse width is working, the pump laser gathers a large number of rubidium atoms at the 52 DJ energy level of the rubidium atoms by exciting the rubidium vapor to undergo two-photon absorption, 52 DJ Rubidium atoms in the energy level rapidly transition to the lower empty energy level 62 PJ to produce 52 DJ -62 PJ mid-infrared radiation, which is coaxial with the pump light. The pump light and the 52 DJ -62 PJ mid-infrared radiation propagating in the same direction on the same axis undergo four-wave mixing to produce blue laser light. 62 PJ to 52 S1/2 transition in rubidium atom. The adjustment laser returns along the original path of the pump laser after passing through the rubidium vapor pool. When the time interval between the adjustment laser and the pump laser is appropriate, the first half of the pulse of the adjustment laser and the second half of the pump laser pulse can meet in the rubidium vapor , this encounter suppresses blue lasing in the second half of the pump laser pulse. Under the condition of not adjusting the pulse width of the pumping laser, the pulse width of the output blue laser can be changed by adjusting the return time of the adjusting laser. The blue laser is output after being separated by the dispersion device.
附图说明Description of drawings
为了更清楚地说明本发明实施例中的技术方案，下面对具体实施例中需要使用的附图进行简单介绍。显而易见地，下面描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings that need to be used in the specific embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.
图1为本发明实施例一。Fig. 1 is the first embodiment of the present invention.
图1编号说明：1-泵浦源，2-铷蒸气池，3-色散装置，4-调节激光光源。Figure 1 number description: 1-pump source, 2-rubidium vapor pool, 3-dispersion device, 4-adjusting laser light source.
图2为本发明实施例二。Fig. 2 is the second embodiment of the present invention.
图2编号说明：1-泵浦源，2-铷蒸气池，3-色散装置。Figure 2 number description: 1-pump source, 2-rubidium vapor pool, 3-dispersion device.
图3为本发明实施例三。Fig. 3 is the third embodiment of the present invention.
图3编号说明：1-泵浦源，2-铷蒸气池，3-色散装置，5-法拉第光隔离器，6-偏振分束器。Figure 3 number description: 1-pump source, 2-rubidium vapor pool, 3-dispersion device, 5-Faraday optical isolator, 6-polarization beam splitter.
图4为本发明实施例四。Fig. 4 is the fourth embodiment of the present invention.
图4编号说明：1-泵浦源，2-铷蒸气池，3-色散装置，7-反射镜。Figure 4 number description: 1-pump source, 2-rubidium vapor pool, 3-dispersion device, 7-reflector.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.
实施例一：脉宽可调的脉冲型铷蒸气蓝光激光器Embodiment 1: Pulsed Rubidium Vapor Blue Laser with Adjustable Pulse Width
实施例一中(1)泵浦源使用一台调Q脉冲Nd：YAG激光器泵浦的染料激光器实现。将其输出的泵浦激光的波长调谐至778.1nm附近，即对准铷原子的52S1/2至52D5/2双光子跃迁，因为脉宽窄至数纳秒，故泵浦峰值功率密度可达数兆瓦每平方厘米。(2)铷蒸气池为使用石英玻璃制造的圆柱形容器，圆柱体的直径为20mm，长度为200mm，圆柱体两端为石英玻璃光学窗口，可以让泵浦激光自由出入，也可以让池内铷蒸气将产生的蓝光激光自由输出。(2)铷蒸气池在彻底清洗、烘干后抽真空，填入1g固体金属铷后封口。(2)铷蒸气池在被恒温加热至130℃～170℃的时候，在其内部产生密度均匀、浓度充足的铷蒸气，因事先已经将其抽真空，故其内部无其他气体。(3)色散装置由一块抛光平行平面石英玻璃基底镀膜制备的二向色镜担任，其在45°角入射使用的前提下，对于420.3nm附近波长具有高达99％以上的反射率，而对于778.1nm附近波长具有高达95％以上的透射率。In the first embodiment (1), the pumping source is realized by using a dye laser pumped by a Q-switched pulsed Nd:YAG laser. The wavelength of the output pump laser is tuned to around 778.1nm, which is to align with the 52 S1/2 to 52 D5/2 two-photon transition of rubidium atoms. Because the pulse width is as narrow as several nanoseconds, the pumping Peak power densities can reach several megawatts per square centimeter. (2) The rubidium vapor cell is a cylindrical container made of quartz glass. The diameter of the cylinder is 20mm and the length is 200mm. Both ends of the cylinder are quartz glass optical windows, which allow the pump laser to enter and exit freely, and also allow the rubidium in the pool to Vapor will produce blue light laser output freely. (2) After thorough cleaning and drying, the rubidium vapor pool is vacuumized, filled with 1g of solid metal rubidium and then sealed. (2) When the rubidium vapor cell is heated to 130°C to 170°C at a constant temperature, rubidium vapor with uniform density and sufficient concentration is generated inside it. Because it has been evacuated in advance, there is no other gas inside. (3) The dispersion device is a dichroic mirror prepared by a polished parallel quartz glass substrate coating, which has a reflectivity of more than 99% for wavelengths near 420.3nm under the premise of using an incident angle of 45°, while for 778.1 The wavelength near nm has a transmittance as high as 95%.
光路的摆放，使(1)泵浦源的输出光束路径通过(2)铷蒸气池的一个窗口进入而从其另一个窗口行出。(3)色散装置放置在(1)泵浦源的输出光束路径上，并使其反射面与此路径呈45°夹角。(3)色散装置放置在(2)铷蒸气池的泵浦激光出射窗口一端。泵浦激光图中用朝右的箭头表示。(4)调节激光光源由另一台调Q脉冲Nd：YAG激光器泵浦的染料激光器实现，输出的调节激光图中用朝左的箭头表示，将调节激光的波长调谐至778.1nm附近，即对准铷原子的52S1/2至52D5/2双光子跃迁，其脉冲与(1)泵浦源输出泵浦激光脉冲之间的时间间隔可以通过同步电路来协调并精确调节。The optical path is arranged so that (1) the output beam path of the pump source enters through one window of the rubidium vapor cell and exits through the other window of (2) the rubidium vapor cell. (3) The dispersion device is placed on (1) the output beam path of the pumping source, and its reflection surface forms an included angle of 45° with this path. (3) The dispersion device is placed at one end of the pump laser exit window of (2) rubidium vapor cell. The pump laser is indicated by a right-facing arrow in the diagram. (4) The adjusted laser light source is realized by another dye laser pumped by a Q-switched pulsed Nd:YAG laser. The time interval between the 52 S1/2 to 52 D5/2 two-photon transition of the quasi-rubidium atom and (1) the pump laser pulse output by the pump source can be coordinated and precisely adjusted by a synchronous circuit.
当启动实施例一中的脉宽可调的脉冲型铷蒸气蓝光激光器时，泵浦激光自(1)泵浦源输出，自(2)铷蒸气池的一个窗口进入(2)铷蒸气池。在铷蒸气中发生双光子吸收效应，使得铷原子由基态52S1/2吸收两个光子的泵浦激光跃迁至52D5/2激发态，并迅速下跃迁至62P3/2态产生52D5/2至62P3/2的放大自发辐射(Amplified spontaneous emission,ASE)光束。此ASE光束与泵浦激光共同作用，产生四波混频(Four-wave-mixing,FWM)效应，FWM效应的结果是产生蓝色激光束，此蓝色激光束的特征是波长在420.3nm左右，对应于铷原子的62P3/2至52S1/2态跃迁，此蓝色激光束与泵浦激光同轴同向传播，并从(2)铷蒸气池的窗口输出。(2)铷蒸气池中输出的蓝色激光和传出的泵浦激光继续行进，到达(3)色散装置，蓝色激光被分离输出，见图中朝下箭头。When the pulse-width-adjustable pulsed rubidium vapor blue laser in Embodiment 1 is started, the pumping laser is output from (1) the pumping source, and enters (2) the rubidium vapor pool from a window of (2) the rubidium vapor pool. The two-photon absorption effect occurs in rubidium vapor, so that the pump laser absorbing two photons from the ground state 52 S1/2 jumps to the 52 D5/2 excited state, and quickly transitions to 62 P3/ The 2 state produces 52 D5/2 to 62 P3/2 amplified spontaneous emission (Amplified spontaneous emission, ASE) beam. The ASE beam and the pump laser work together to produce a four-wave-mixing (FWM) effect. The result of the FWM effect is to produce a blue laser beam. The blue laser beam is characterized by a wavelength of about 420.3nm , corresponding to the 62 P3/2 to 52 S1/2 state transition of the rubidium atom, the blue laser beam propagates coaxially and in the same direction as the pump laser, and is output from (2) the window of the rubidium vapor cell. (2) The blue laser output from the rubidium vapor cell and the outgoing pump laser continue to travel to (3) the dispersion device, and the blue laser is separated and output, as shown by the downward arrow in the figure.
(4)调节激光光源的激光调节到与(1)泵浦源波长相同，也是每秒钟输出10个脉冲，脉冲上升沿陡峭度、脉冲能量密度与泵浦激光相似，光路与泵浦激光光路重合，实现精确逆向前进，图中用朝左的箭头表示。用一个响应速度在1ns以下的高速硅光电二极管探头探测产生的蓝色激光脉冲，响应信号在示波器上显示，可以看到它的波形。打开(4)调节激光光源产生调节激光，并调整使之比(1)泵浦源的泵浦激光脉冲晚约十纳秒到达铷蒸气池中心点，并将(4)调节激光光源的输出激光时间徐徐提前，则在泵浦激光脉冲前半段刚通过铷蒸气池后调节激光才到达铷蒸气池，与泵浦激光脉冲后半段在铷蒸气中相遇。这时可以在示波器屏幕上看到蓝色激光的脉冲从下降沿开始被逐渐吞食，脉冲宽度被压窄，上升沿与未压窄情形相似而下降沿比较未压窄情形较快结束，这表明了调节激光对泵浦激光产生蓝色激光具有一种干扰、抑制作用，这种作用与调节激光干扰与泵浦激光同轴同向的铷原子52D5/2至62P3/2放大自发辐射的生成有关，也可能与调节激光影响了泵浦激光生成的铷原子中的三阶非线性电极化矢量的分布从而干扰产生蓝色激光的四波混频的进行有关。(4) Adjust the laser of the laser light source to the same wavelength as (1) the pump source, and also output 10 pulses per second. The steepness of the pulse rising edge and the pulse energy density are similar to those of the pump laser, and the optical path is the same as that of the pump laser. Coincidence, to achieve precise reverse forward, the figure is indicated by the arrow facing left. Use a high-speed silicon photodiode probe with a response speed below 1ns to detect the blue laser pulse generated, and the response signal is displayed on the oscilloscope, and its waveform can be seen. Turn on (4) adjust the laser light source to generate the adjusted laser, and adjust it to reach the central point of the rubidium vapor pool about ten nanoseconds later than the pump laser pulse of the (1) pump source, and adjust the output laser of the (4) laser light source The time is gradually advanced, and the laser is adjusted to reach the rubidium vapor pool just after the first half of the pump laser pulse passes through the rubidium vapor pool, and meets the second half of the pump laser pulse in the rubidium vapor. At this time, it can be seen on the screen of the oscilloscope that the pulse of the blue laser is gradually swallowed from the falling edge, and the pulse width is narrowed. In order to adjust the laser to have an interference and inhibition effect on the blue laser generated by the pump laser, this effect is the same as that of the rubidium atom 52 D5/2 to 62 P3/2 coaxial and in the same direction as the adjustment laser interference with the pump laser The generation of amplified spontaneous emission is related to the generation of amplified spontaneous emission, and it may also be related to the fact that the adjustment of the laser affects the distribution of the third-order nonlinear electric polarization vector in the rubidium atoms generated by the pump laser, thereby interfering with the four-wave mixing that produces the blue laser.
(1)泵浦源与(4)调节激光光源的激光为线偏振，偏振方向平行或垂直并不造成结果明显不同，波长略有差别时，若都在铷蒸气52S1/2至52D5/2双光子跃迁的范围之内时，也并不造成结果明显不同。(1) The pump source and (4) the laser light of the adjusted laser source are linearly polarized, and the results are not significantly different if the polarization direction is parallel or vertical. When the wavelength is slightly different, if they are all intherubidium vapor2 D5/2 two-photon transition range, it does not cause significant difference in the results.
实施例二：简易的脉宽可调的脉冲型铷蒸气蓝光激光器Embodiment 2: Simple pulse-type rubidium vapor blue laser with adjustable pulse width
与实施例一相比，实施例二的基本原理相同，但是使用一个90°入射角二向色镜来充任(3)色散元件，它将经过(2)铷蒸气池未消耗完的泵浦激光原路反射回，使之充任调节激光，这样就不需要单独的一台激光器作为调节激光光源。调节激光的返回时间可以通过沿着光路前后移动(3)色散元件来实现。(3)色散元件右侧箭头表示蓝色激光透过(3)色散元件输出，左侧箭头表示泵浦激光和调节激光。Compared with embodiment one, the basic principle of embodiment two is the same, but use a 90 ° incident angle dichroic mirror to serve as (3) dispersive element, it will pass through (2) pump laser that the rubidium vapor pool has not exhausted The original path is reflected back to make it act as an adjustment laser, so that there is no need for a separate laser as an adjustment laser light source. Adjusting the return time of the laser light can be achieved by moving the (3) dispersive element back and forth along the optical path. (3) The arrow on the right side of the dispersive element indicates that the blue laser is output through the (3) dispersive element, and the arrow on the left indicates the pumping laser and the adjustment laser.
实施例三：带光隔离器的脉宽可调的脉冲型铷蒸气蓝光激光器Embodiment 3: Pulsed Rubidium Vapor Blue Laser with Adjustable Pulse Width with Optical Isolator
与实施例二相比，实施例三在(1)泵浦源的输出光束路径上增添放置了(5)法拉第光隔离器和(6)偏振分束器两个器件，其中(5)法拉第光隔离器位于(2)铷蒸气池和(3)色散装置之间，(6)偏振分束器位于(1)泵浦源和(2)铷蒸气池之间。(5)法拉第光隔离器适用于泵浦激光的波长，而且对于此实施例产生的蓝色激光具有高透过率，(6)偏振分束器适用于泵浦激光。Compared with Embodiment 2, Embodiment 3 adds (5) Faraday optical isolator and (6) polarization beam splitter two devices on the output beam path of (1) pumping source, wherein (5) Faraday light The isolator is located between (2) the rubidium vapor cell and (3) the dispersion device, and the (6) polarizing beam splitter is located between the (1) pump source and (2) the rubidium vapor cell. (5) The Faraday optical isolator is suitable for the wavelength of the pumping laser, and has high transmittance for the blue laser generated in this embodiment, and (6) the polarizing beam splitter is suitable for the pumping laser.
当启动实施例三中的带光隔离器的脉宽可调的脉冲型铷蒸气蓝光激光器时，通过(6)偏振分束器的泵浦激光为线偏振光，此泵浦激光通过(2)铷蒸气池到达(5)法拉第光隔离器被旋转45°角，被(3)色散装置返回时又一次通过(5)法拉第光隔离器，总旋转角达到90°。返回的泵浦激光继续传播，通过(2)铷蒸气池到达(4)偏振分束器因偏振方向已经改变90°而被偏出光路，避免了返回的泵浦激光打回到(1)泵浦源中。虽然(2)铷蒸气池内部，铷蒸气中前行的泵浦激光和返回的泵浦激光具有不同的偏振方向，如实施例一中描述的对蓝色激光产生的干扰抑制作用仍然存在，因此当向着(2)铷蒸气池方向推动(3)色散装置时，仍可以有效缩短实施例二中产生的蓝色激光的脉冲宽度。同时实施例三因为避免了泵浦激光打回到(1)泵浦源中，无需担忧泵浦激光打回损坏(1)泵浦源，因此可以使用更大能量的泵浦激光和更大浓度的铷蒸气，从而获得更大能量的蓝色激光输出。When starting the pulse-width-adjustable pulse-type rubidium vapor blue laser with an optical isolator in Embodiment 3, the pump laser light passing through (6) polarizing beam splitter is linearly polarized light, and the pump laser light passes through (2) The rubidium vapor pool reaches the (5) Faraday optical isolator and is rotated at an angle of 45°, and when it is returned by the (3) dispersion device, it passes through the (5) Faraday optical isolator again, and the total rotation angle reaches 90°. The returned pump laser continues to propagate, and reaches the (4) polarization beam splitter through the (2) rubidium vapor cell, which is deviated from the optical path because the polarization direction has been changed by 90°, so as to prevent the returned pump laser from returning to the (1) pump Puyuanzhong. Although (2) inside the rubidium vapor pool, the forward pumping laser and the returning pumping laser in the rubidium vapor have different polarization directions, as described in Embodiment 1, the interference suppression effect on the blue laser still exists, so When the (3) dispersion device is pushed toward (2) the direction of the rubidium vapor cell, the pulse width of the blue laser generated in the second embodiment can still be effectively shortened. At the same time, because the third embodiment avoids the pumping laser returning to (1) the pumping source, there is no need to worry about the pumping laser returning to damage (1) the pumping source, so a pumping laser with greater energy and a greater concentration can be used. rubidium vapor, so as to obtain a blue laser output with greater energy.
(3)色散元件右侧箭头表示蓝色激光输出，左侧箭头表示泵浦激光和调节激光。(3) The arrow on the right side of the dispersion element indicates the blue laser output, and the arrow on the left indicates the pumping laser and the adjustment laser.
实施例四：棱镜型脉宽可调的脉冲型铷蒸气蓝光激光器Embodiment 4: Prism-type pulse-type rubidium vapor blue laser with adjustable pulse width
实施例四的实现原理与实施例二、三相同。区别在于实施例二、三中使用一片二向色镜为色散装置，而在实施例四中，(3)色散装置由一个三棱镜担任，其将实施例四中的泵浦激光与产生的蓝色激光进行空间分离。(7)反射镜是一个泵浦激光的高反射率平面镜担任，其将泵浦激光原路返回充任调节激光。The implementation principle of the fourth embodiment is the same as that of the second and third embodiments. The difference is that a piece of dichroic mirror is used as the dispersion device in embodiment two and three, and in embodiment four, (3) the dispersion device is served by a prism, which combines the pump laser light and the blue color produced in embodiment four Laser for spatial separation. (7) The reflector is a high-reflectivity flat mirror of the pump laser, which returns the pump laser to the original path and acts as a regulating laser.
(3)色散元件中靠下侧箭头表示蓝色激光输出，其余箭头表示泵浦激光和调节激光。(3) The arrow on the lower side of the dispersive element indicates the blue laser output, and the other arrows indicate the pumping laser and the adjusting laser.
实施例五：光栅型脉宽可调的脉冲型铷蒸气蓝光激光器Embodiment 5: Grating type pulse width adjustable rubidium vapor blue laser
实施例五的实现原理与实施例四相同。区别在于色散装置由三棱镜换成了光栅，光栅与三棱镜相比，其对泵浦激光与产生的蓝色激光进行的空间分离更加显著，方便了光路摆放。The implementation principle of the fifth embodiment is the same as that of the fourth embodiment. The difference is that the dispersion device is changed from a prism to a grating. Compared with a prism, a grating has a more significant spatial separation of the pump laser and the generated blue laser, which facilitates the placement of the optical path.
实施例六：双线型脉宽可调的脉冲型铷蒸气蓝光激光器Embodiment 6: Dual-line pulse-width-adjustable pulsed rubidium vapor blue laser
实施例六的实现原理、装置与实施例一相同。区别在于泵浦激光的波长调谐至778.3nm附近，对准铷原子的52S1/2至52D3/2双光子跃迁，此时可同时获得52D3/2至62P3/2和52D3/2至62P1/2的放大自发辐射光束，并通过四波混频过程同时获得波长对应铷原子62P3/2至52S1/2态跃迁的蓝光输出和波长对应铷原子62P1/2至52S1/2态跃迁的蓝光输出。The implementation principle and device of the sixth embodiment are the same as those of the first embodiment. The difference is that the wavelength of the pump laser is tuned to around 778.3nm, which is aligned with the 52 S1/2 to 52 D3/2 two-photon transition of the rubidium atom. At this time, 52 D3/2 to 62 P can be obtained simultaneously3/2 and 52 D3/2 to 62 P1/2 amplified spontaneous emission beams, and through the four-wave mixing process to simultaneously obtain the wavelength corresponding to the rubidium atom 62 P3/2 to 52 S1/2 state The blue light output and wavelength of the transition correspond to the blue light output of the 62 P1/2 to 52 S1/2 state transition of the rubidium atom.
以上所述仅为本发明的一部分实施例。任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，在不付出创造性劳动即可得到的变化或替换也应涵盖在本发明的保护范围内。The above descriptions are only some embodiments of the present invention. Any changes or replacements that can be obtained by any person familiar with the technical field within the technical scope disclosed in the present invention without any creative effort shall also be covered by the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098739.6ACN108155555B (en) | 2016-12-04 | 2016-12-04 | A Pulsed Rubidium Vapor Blue Laser with Adjustable Pulse Width |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098739.6ACN108155555B (en) | 2016-12-04 | 2016-12-04 | A Pulsed Rubidium Vapor Blue Laser with Adjustable Pulse Width |
| Publication Number | Publication Date |
|---|---|
| CN108155555Atrue CN108155555A (en) | 2018-06-12 |
| CN108155555B CN108155555B (en) | 2019-11-15 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611098739.6AExpired - Fee RelatedCN108155555B (en) | 2016-12-04 | 2016-12-04 | A Pulsed Rubidium Vapor Blue Laser with Adjustable Pulse Width |
| Country | Link |
|---|---|
| CN (1) | CN108155555B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186493A (en)* | 2019-07-04 | 2021-01-05 | 中国科学院大连化学物理研究所 | Novel two-photon pumping rubidium steam blue laser based on hollow-core photonic crystal fiber |
| CN113572008A (en)* | 2021-07-23 | 2021-10-29 | 中国科学院上海微系统与信息技术研究所 | Light source and parallel light source and serial light source thereof |
| CN114114856A (en)* | 2021-12-16 | 2022-03-01 | 深圳市笨辉光电科技有限公司 | A lithography machine system and lithography method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176327A (en)* | 1978-01-25 | 1979-11-27 | United Technologies Corporation | Method for cavity dumping a Q-switched laser |
| CN87103899A (en)* | 1987-05-27 | 1988-12-14 | 华中工学院 | A Q-switched laser pulse waveform adjustment method |
| US4922498A (en)* | 1986-06-06 | 1990-05-01 | Kearsley Andrew J | Lasers |
| CN1819377A (en)* | 2005-02-04 | 2006-08-16 | Jds尤尼弗思公司 | Passively q-switched laser with adjustable pulse repetition rate |
| CN203150894U (en)* | 2013-02-20 | 2013-08-21 | 广东汉唐量子光电科技有限公司 | Pulse pump type annular resonant cavity nanosecond pulse laser device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176327A (en)* | 1978-01-25 | 1979-11-27 | United Technologies Corporation | Method for cavity dumping a Q-switched laser |
| US4922498A (en)* | 1986-06-06 | 1990-05-01 | Kearsley Andrew J | Lasers |
| CN87103899A (en)* | 1987-05-27 | 1988-12-14 | 华中工学院 | A Q-switched laser pulse waveform adjustment method |
| CN1819377A (en)* | 2005-02-04 | 2006-08-16 | Jds尤尼弗思公司 | Passively q-switched laser with adjustable pulse repetition rate |
| CN203150894U (en)* | 2013-02-20 | 2013-08-21 | 广东汉唐量子光电科技有限公司 | Pulse pump type annular resonant cavity nanosecond pulse laser device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186493A (en)* | 2019-07-04 | 2021-01-05 | 中国科学院大连化学物理研究所 | Novel two-photon pumping rubidium steam blue laser based on hollow-core photonic crystal fiber |
| CN113572008A (en)* | 2021-07-23 | 2021-10-29 | 中国科学院上海微系统与信息技术研究所 | Light source and parallel light source and serial light source thereof |
| CN114114856A (en)* | 2021-12-16 | 2022-03-01 | 深圳市笨辉光电科技有限公司 | A lithography machine system and lithography method |
| Publication number | Publication date |
|---|---|
| CN108155555B (en) | 2019-11-15 |
| Publication | Publication Date | Title |
|---|---|---|
| Manzoni et al. | Coherent pulse synthesis: towards sub‐cycle optical waveforms | |
| Kryukov | Ultrashort-pulse lasers | |
| DeMaria et al. | Ultrashort light pulses | |
| US11630373B2 (en) | System and method for generating heralded single photon | |
| US9377667B2 (en) | Cascaded optical harmonic generation | |
| JP6445012B2 (en) | Method and system for generating Raman second-order Stokes light in source light | |
| CN108155555B (en) | A Pulsed Rubidium Vapor Blue Laser with Adjustable Pulse Width | |
| Antoncini | Ultrashort laser pulses | |
| CN111033375B (en) | Terahertz wave generation method and terahertz wave generation device | |
| Tausenev et al. | Efficient source of femtosecond pulses and its use for broadband supercontinuum generation | |
| WO1988006811A1 (en) | Phase locked mode laser generator | |
| Lotscher et al. | Long-term stability of nonlinear pulse compression using solid-core large-mode-area fibers | |
| LT5968B (en) | Method and device for sum-frequency generation of light pulses | |
| CN112490836B (en) | A Gas Raman Laser Based on Ring Unstable Cavity | |
| Dashkevich et al. | Raman laser based on a KGd (WO4) 2 crystal: generation of stokes components in the 1.7–1.8 μm range | |
| Frank | Generation and application of ultrashort laser pulses in attosecond science | |
| JP7737363B2 (en) | Noncompressed and single-beam generation of carrier-envelope phase-stable optical pulses | |
| Veltchev | Stimulated Brillouin scattering pulse compression and harmonic generation: applications to precision XUV laser spectroscopy | |
| Cerullo et al. | Time domain vibrational spectroscopy: principle and experimental tools | |
| Anderson | Methods of generating carrier-envelope-phase stabilized, intense, few-cycle laser pulses | |
| Divall‘Csatári et al. | ’, High power laser development in the UV for accelerators and light sources | |
| Ei | 8.1 Physical Principles | |
| Ebongue | Development of A High-Power Pulsed Laser via Sum-Frequency Generation for Sodium Lidar Applications | |
| CN118970611A (en) | Double pulse generating device and method | |
| Xu et al. | Temporal characteristics of a gain-switched Ti: sapphire laser |
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20191115 | |
| CF01 | Termination of patent right due to non-payment of annual fee |