CN101976796B - Method for inhibiting amplified spontaneous radiation of large-size sheet laser neodymium glass - Google Patents
Method for inhibiting amplified spontaneous radiation of large-size sheet laser neodymium glassDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及固态激光器，特别是一种抑制大尺寸片状激光钕玻璃放大自发辐射(Amplified Spontaneous Emission，简称为ASE)的方法，更确切地说，是一种抑制大尺寸激光钕玻璃放大自发辐射和寄生振荡的方法。The invention relates to a solid-state laser, in particular to a method for suppressing the amplified spontaneous emission (Amplified Spontaneous Emission, ASE) of a large-scale laser neodymium glass, more precisely, a method for suppressing the amplified spontaneous emission of a large-scale laser neodymium glass and parasitic oscillation methods.
背景技术Background technique
寄生振荡形成的条件是R·eDβ≥1，式中R为边界反射率，β为增益系数，D为激光钕玻璃片长轴直径，随着Dβ增大，易于发生寄生振荡和放大的自发辐射(ASE)，造成反转粒子数Δn的逃逸和减少，使激光钕玻璃增益减少。寄生振荡分为两种模式：The condition for the formation of parasitic oscillation is that R·eDβ ≥ 1, where R is the boundary reflectivity, β is the gain coefficient, and D is the long-axis diameter of the laser neodymium glass sheet. As Dβ increases, spontaneous oscillation and amplification are prone to occur. Radiation (ASE), which causes the escape and reduction of the number of inversion particles Δn, reduces the gain of laser neodymium glass. Parasitic oscillations are divided into two modes:
体寄生模式，在平行平板激光钕玻璃中呈锯齿波传播；Bulk parasitic mode, propagating as a sawtooth wave in parallel flat-plate laser Nd-glass;
表面寄生模式，沿激光钕玻璃片表面传播，表面吸收氙灯光较强，其β值较高，Dβ值也较大，发生寄生振荡可能性较大。The surface parasitic mode propagates along the surface of the laser neodymium glass sheet, the surface absorbs xenon light strongly, its β value is high, and the Dβ value is also large, so the possibility of parasitic oscillation is relatively high.
当R·eDβ≥1，发生寄生振荡。激光钕玻璃和吸收玻璃之间发生分层现象以后，R＝0.044，放大器增益急剧下降。When R·eDβ ≥ 1, parasitic oscillation occurs. After delamination occurs between the laser neodymium glass and the absorbing glass, R=0.044, the amplifier gain drops sharply.
1＞R·eDβ＞0，减幅振荡，形成放大自发辐射(ASE)损耗。1>R·eDβ >0, damped oscillation, forming Amplified Spontaneous Emission (ASE) loss.
即使R＝0，Dβ≥3时，单程的ASE损耗成为反转粒子Δn逃逸的主要途径。Even if R=0 and Dβ≥3, the one-way ASE loss becomes the main way for the inversion particle Δn to escape.
主放大器的Dβ值为2.4，表面β值＞0.06，要获得较高增益的片状放大器，抑制片状激光钕玻璃放大器中寄生振荡的方法和工艺技术显得十分重要。The Dβ value of the main amplifier is 2.4, and the surface β value is >0.06. To obtain a chip amplifier with higher gain, the method and technology of suppressing the parasitic oscillation in the chip laser neodymium glass amplifier are very important.
抑制和减少寄生振荡的有效方法是在激光钕玻璃片侧面匹配一层能够有效吸收1.053um荧光的掺氧化铜玻璃，使边界反射减少到接近零。An effective way to suppress and reduce parasitic oscillation is to match a layer of copper oxide-doped glass that can effectively absorb 1.053um fluorescence on the side of the laser neodymium glass plate, so that the boundary reflection is reduced to close to zero.
早期抑制和减少寄生振荡较为成熟的方法主要是通过烧结或浇注的工艺将吸收玻璃连接到激光钕玻璃的侧边，以期达到抑制放大自发辐射和寄生振荡的目的。但是该方法存在成品率低下、成本高、风险大、剩余反射率大等缺点，限制了上述方法在大尺寸激光钕玻璃上的应用。The more mature method of suppressing and reducing parasitic oscillations in the early days is mainly to connect the absorbing glass to the side of the laser neodymium glass through sintering or casting process, in order to achieve the purpose of suppressing amplified spontaneous emission and parasitic oscillations. However, this method has disadvantages such as low yield, high cost, high risk, and large residual reflectivity, which limit the application of the above method on large-scale laser neodymium glass.
发明内容Contents of the invention
本发明的目的在于保证激光钕玻璃对激光能量的有效放大能力，提供一种抑制大尺寸激光钕玻璃放大自发辐射的方法，以有效地抑制大尺寸片状激光钕玻璃放大自发辐射和寄生振荡，使增益性能接近理论计算水平，满足高功率激光装置的使用要求。The purpose of the present invention is to ensure the effective amplification capability of laser neodymium glass to laser energy, and provide a method for suppressing the amplification of spontaneous emission of large-scale laser neodymium glass, so as to effectively suppress the amplification of spontaneous emission and parasitic oscillation of large-scale sheet laser neodymium glass, The gain performance is close to the theoretical calculation level, and the requirements for the use of high-power laser devices are met.
本发明的技术解决方案如下：Technical solution of the present invention is as follows:
一种抑制大尺寸片状激光钕玻璃放大自发辐射的方法，其特征在于该方法包括下列步骤：A method for suppressing amplified spontaneous emission of large-scale sheet laser neodymium glass, characterized in that the method comprises the following steps:
(一)选取与所述的片状激光钕玻璃相匹配的吸收玻璃和有机粘接剂：该吸收玻璃的热膨胀系数与所述的片状激光钕玻璃的热膨胀系数的差值小于2％，所述的吸收玻璃在激光波长的折射率n1大于所述片状激光钕玻璃在激光波长的折射率n2，且n1-n2＝0.0005～0.005；选取有机粘接剂，该有机粘接剂和所述片状激光钕玻璃在激光波长的折射率匹配，所述的有机粘接剂在激光波长的折射率n3，要求满足关系式：n2＜n3＜n1；(1) Select absorbing glass and organic adhesive that match the sheet laser neodymium glass: the difference between the coefficient of thermal expansion of the absorbing glass and the thermal expansion coefficient of the sheet laser neodymium glass is less than 2%, so The refractive index n1 of the above-mentioned absorbing glass at the laser wavelength is greater than the refractive index n2 of the sheet-shaped laser neodymium glass at the laser wavelength, and n1 -n2 = 0.0005-0.005; choose an organic adhesive, the organic adhesive The refractive index of the sheet-shaped laser neodymium glass matches the laser wavelength, and the refractive index n3 of the organic adhesive at the laser wavelength is required to satisfy the relationship: n2 <n3 <n1 ;
(二)所述的片状激光钕玻璃和吸收玻璃板条的加工和粘贴：对所述的片状激光钕玻璃的周边选配尺寸相适应的吸收玻璃板条并进行光学加工，经处理后，用所述的有机粘接剂，将所述的吸收玻璃板条紧密地粘贴在所述的片状激光钕玻璃的周边上；(2) Processing and pasting of the sheet-shaped laser neodymium glass and absorbing glass slats: matching absorbing glass slats of suitable size to the periphery of the sheet-shaped laser neodymium glass and performing optical processing. , using the organic adhesive to closely paste the absorbing glass slats on the periphery of the sheet-shaped laser neodymium glass;
(三)片状激光钕玻璃的通光面进行精密抛光：将周边都粘贴了所述的吸收玻璃板条的片状激光钕玻璃进行外部尺寸整形，对所述的片状激光钕玻璃的通光面进行精密抛光并达到设计要求。(3) The light-transmitting surface of the sheet-shaped laser neodymium glass is precisely polished: the sheet-shaped laser neodymium glass with the absorbing glass slats pasted on the periphery is subjected to external dimension shaping, and the pass-through surface of the sheet-shaped laser neodymium glass is The smooth surface is precision polished and meets the design requirements.
所述的第(二)步包括下列具体步骤：Described (2) step comprises following concrete steps:
①对所述的片状激光钕玻璃的周边的相间隔的侧边进行光学加工，根据所述的片状激光钕玻璃的相间隔的侧边的尺寸，选配尺寸相适应的吸收玻璃板条，并对所述的吸收玻璃板条进行光学加工；①Optical processing is carried out on the spaced sides of the periphery of the sheet-shaped laser neodymium glass, and according to the size of the spaced sides of the sheet-shaped laser neodymium glass, absorbing glass slats with suitable sizes are selected , and optically process the absorbing glass slats;
②对所述的片状激光钕玻璃和所述的吸收玻璃板条进行光学加工后的光学平面，实施酸性物质处理和偶联剂处理；②The optical plane after the optical processing of the sheet-shaped laser neodymium glass and the absorbing glass slat is subjected to acid substance treatment and coupling agent treatment;
③用所述的有机粘接剂，将所述的吸收玻璃板条紧密地粘贴在所述的片状激光钕玻璃的相应的侧边上；③ Using the organic adhesive, the absorbing glass slats are closely pasted on the corresponding sides of the sheet laser neodymium glass;
④对所述的片状激光钕玻璃尚未粘贴吸收玻璃板条的侧边一一进行光学加工，根据所述的片状激光钕玻璃尚未粘贴吸收玻璃板条的侧边的尺寸，配备尺寸相适应的吸收玻璃板条，对所述的吸收玻璃板条进行光学加工；④ Perform optical processing on the sides of the sheet-shaped laser neodymium glass that have not been pasted with absorbing glass slats one by one. absorbing glass slats, optically processing said absorbing glass slats;
⑤对所述的片状激光钕玻璃和所述的吸收玻璃板条进行光学加工后的光学平面，实施酸性物质处理和偶联剂处理；5. Carry out acidic substance treatment and coupling agent treatment to the optical plane after optical processing of the sheet-shaped laser neodymium glass and the described absorbing glass slab;
⑥用所述的有机粘接剂，将所述的吸收玻璃板条紧密地粘贴在所述的片状激光钕玻璃的相应的侧边上⑥ Using the organic adhesive, stick the absorbing glass slats tightly on the corresponding sides of the sheet laser neodymium glass
所述的吸收玻璃为掺杂氧化铜的磷酸盐玻璃，该吸收玻璃掺杂氧化铜的重量百分比为0.1％～1％。The absorption glass is phosphate glass doped with copper oxide, and the weight percentage of the absorption glass doped with copper oxide is 0.1%-1%.
所述的有机粘接剂在固化过程中无挥发性组分产生；所述的有机粘接剂在固化过程中体积收缩率低于7％。The organic adhesive does not produce volatile components during the curing process; the volume shrinkage of the organic adhesive is lower than 7% during the curing process.
所述的偶联剂为硅烷偶联剂或钛酸酯偶联剂，所述的偶联剂处理是将所述的硅烷偶联剂或钛酸酯偶联剂溶解在稀乙酸中，将需要处理的光学面浸泡在所述的硅烷偶联剂或钛酸酯偶联剂的酸溶液中进行处理。Described coupling agent is silane coupling agent or titanate coupling agent, and described coupling agent treatment is that described silane coupling agent or titanate coupling agent are dissolved in dilute acetic acid, will need The treated optical surface is soaked in the acid solution of the silane coupling agent or titanate coupling agent for treatment.
所述的酸性物质为乙酸，该乙酸的配制浓度0.2mol/L，浸泡处理所述的钕玻璃侧边和所述的吸收玻璃板条的光学平面。The acidic substance is acetic acid, the concentration of which is 0.2 mol/L, and the side of the neodymium glass and the optical plane of the absorbing glass strip are soaked.
所述的激光玻璃侧边和所述的吸收玻璃板条相互粘贴的光学平面的加工精度要求达到2级或2级以上光洁度，平整度达到或优于4λ。The processing accuracy of the optical plane on which the sides of the laser glass and the absorbing glass slats are attached to each other is required to reach level 2 or above smoothness, and the flatness to reach or be better than 4λ.
所述的激光钕玻璃的侧边与该激光钕玻璃的通光面的垂直面具有1°～4°的倾角，且相对侧面的倾角相互平行。The side of the laser neodymium glass has an inclination angle of 1°-4° to the vertical surface of the light-transmitting surface of the laser neodymium glass, and the inclination angles of opposite sides are parallel to each other.
本发明与现有技术相比，优点在于：Compared with the prior art, the present invention has the advantages of:
1、本发明方法，由于不需要高温烧结和精密温度控制，因此工艺简单、易于操作。1. The method of the present invention is simple in process and easy to operate because it does not require high-temperature sintering and precise temperature control.
2、本发明方法，通过对有机粘接剂选取，其折射率可以和激光钕玻璃、吸收玻璃准确匹配，保证抑制ASE寄生振荡的效果。2. In the method of the present invention, by selecting the organic adhesive, its refractive index can be accurately matched with laser neodymium glass and absorbing glass, so as to ensure the effect of suppressing ASE parasitic oscillation.
3、本发明方法，通过选取不同Cu2+离子浓度的吸收玻璃，可有效控制吸收玻璃热效应和吸收激光的能力，达到抑制ASE效果和长时间稳定运行的平衡。3. The method of the present invention, by selecting absorbing glasses with different Cu2+ ion concentrations, can effectively control the thermal effect of the absorbing glass and the ability to absorb laser light, and achieve a balance between ASE suppression effect and long-term stable operation.
4、本发明方法，避免了吸收玻璃与激光玻璃的直接烧结作用，因此附加应力小，不影响大尺寸钕玻璃通光口径内的光学均匀性，特别适合于抑制大尺寸激光钕玻璃放大自发辐射。4. The method of the present invention avoids the direct sintering effect of absorbing glass and laser glass, so the additional stress is small and does not affect the optical uniformity in the light aperture of large-size neodymium glass, and is especially suitable for suppressing the amplification of spontaneous radiation of large-size laser neodymium glass .
5、本发明方法，通过对片状激光钕玻璃的侧边加工成一定的倾角，过滤有机粘接剂中杂质减少吸收源，能有效减少有机粘接剂遭受激光破坏和热破坏，可以长时间稳定运行不脱胶，保证钕玻璃增益系数不下降。5. The method of the present invention, by processing the side of the sheet-shaped laser neodymium glass into a certain inclination, filters the impurities in the organic adhesive to reduce the absorption source, can effectively reduce the organic adhesive from being damaged by laser and heat, and can be used for a long time Stable operation without degumming ensures that the gain coefficient of neodymium glass does not decrease.
6、本发明所述的技术操作过程安全可靠，适合于批量化的抑制大尺寸激光钕玻璃放大自发辐射应用，易于实现产品间的性能一致性。6. The technical operation process of the present invention is safe and reliable, and is suitable for the batch-scale application of inhibiting large-scale laser neodymium glass from amplifying spontaneous emission, and is easy to realize the consistency of performance among products.
附图说明Description of drawings
图1为本发明实施例1的片状激光钕玻璃长侧边和吸收玻璃板条配置示意图。Fig. 1 is a schematic diagram of the arrangement of the long sides of the sheet-shaped laser neodymium glass and the absorbing glass slats according to
图2为本发明实施例1的片状激光钕玻璃长侧边和吸收玻璃板条粘贴示意。Fig. 2 is a schematic diagram of pasting the long side of the sheet-shaped laser neodymium glass and the absorbing glass slats in Example 1 of the present invention.
图3为本发明实施例1的片状激光钕玻璃短侧边和吸收玻璃板条配置示意图。Fig. 3 is a schematic diagram of the arrangement of the short sides of the sheet-shaped laser neodymium glass and the absorbing glass slabs according to
图4为本发明实施例1的片状激光钕玻璃长侧边和吸收玻璃板条粘贴示意图。Fig. 4 is a schematic diagram of sticking the long side of the sheet-shaped laser neodymium glass and the absorbing glass slats according to
图5为本发明实施例1的片状激光钕玻璃外形尺寸整形及通光面精密抛光后的结构示意图。Fig. 5 is a schematic diagram of the structure of the sheet-shaped laser neodymium glass according to
图6为本发明实施例3八边形片状激光钕玻璃的四斜边和吸收玻璃板条配置示意图。Fig. 6 is a schematic diagram of the arrangement of four hypotenuses and absorbing glass slats of an octagonal sheet laser neodymium glass according to
图7为本发明实施例3八边形片状激光钕玻璃的四斜边和吸收玻璃板条粘贴后的结构示意图。Fig. 7 is a schematic structural view of the four hypotenuses of the octagonal sheet laser neodymium glass and the absorbing glass slats of
图8为本发明实施例3八边形片状激光钕玻璃的四直边和吸收玻璃板条配置示意图。Fig. 8 is a schematic diagram of the arrangement of four straight sides and absorbing glass slats of an octagonal sheet laser neodymium glass according to
图9为本发明实施例3八边形片状激光钕玻璃外形尺寸整形及通光面精密抛光后的结构示意图。Fig. 9 is a schematic structural view of octagonal sheet-shaped laser neodymium glass according to
具体实施方式Detailed ways
下面结合附图和实施例对本发明作进一步说明，但不应以此限制本发明的保护范围。The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited thereby.
对多边形大尺寸片状激光钕玻璃，本发明描述如下：For polygonal large-size flake laser neodymium glass, the present invention is described as follows:
一种抑制大尺寸片状激光钕玻璃放大自发辐射的方法，该方法包括下列步骤：A method for suppressing amplified spontaneous emission of large-scale sheet laser neodymium glass, the method comprising the following steps:
①选取与所述的片状激光钕玻璃相匹配的吸收玻璃，该吸收玻璃的热膨胀系数与所述的片状激光钕玻璃的热膨胀系数的差值小于2％，所述的吸收玻璃在激光波长的折射率n1大于所述片状激光钕玻璃在激光波长的折射率n2，且n1-n2＝0.0005～0.005；选取有机粘接剂，该有机粘接剂和所述片状激光钕玻璃在激光波长的折射率匹配，所述的有机粘接剂在激光波长的折射率n3，要求满足关系式：n2＜n3＜n1；① Select the absorbing glass that matches the sheet laser neodymium glass, the difference between the thermal expansion coefficient of the absorbing glass and the thermal expansion coefficient of the sheet laser neodymium glass is less than 2%. The refractive index n1 of the sheet-shaped laser neodymium glass is greater than the refractive index n2 of the laser wavelength, and n1 -n2 =0.0005～0.005; an organic adhesive is selected, and the organic adhesive and the sheet-shaped laser The refractive index of neodymium glass is matched at the laser wavelength, and the refractive index n3 of the organic adhesive at the laser wavelength is required to satisfy the relationship: n2 <n3 <n1 ;
②对所述的片状激光钕玻璃的周边的相间隔的侧边进行光学加工，根据所述的片状激光钕玻璃的相间隔的侧边的尺寸，选配尺寸相适应的吸收玻璃板条，并对所述的吸收玻璃板条进行光学加工；② Perform optical processing on the spaced sides of the periphery of the sheet-shaped laser neodymium glass, and select and match absorbing glass slats with appropriate sizes according to the size of the spaced sides of the sheet-shaped laser neodymium glass , and optically process the absorbing glass slats;
③对所述的片状激光钕玻璃和所述的吸收玻璃板条进行光学加工后的光学平面，实施酸性物质处理和偶联剂处理；③ carry out acidic substance treatment and coupling agent treatment to the optical plane after the optical processing of the sheet laser neodymium glass and the absorption glass slat;
④用所述的有机粘接剂，将所述的吸收玻璃板条紧密地粘贴在所述的片状激光钕玻璃的相应的侧边上；④ Using the organic adhesive, the absorbing glass slats are closely pasted on the corresponding sides of the sheet laser neodymium glass;
⑤对所述的片状激光钕玻璃尚未粘贴吸收玻璃板条的侧边一一进行光学加工，根据所述的片状激光钕玻璃尚未粘贴吸收玻璃板条的侧边的尺寸，配备尺寸相适应的吸收玻璃板条，对所述的吸收玻璃板条进行光学加工；⑤ Perform optical processing on the sides of the sheet-shaped laser neodymium glass that have not been pasted with absorbing glass slats one by one. absorbing glass slats, optically processing said absorbing glass slats;
⑥对所述的片状激光钕玻璃和所述的吸收玻璃板条进行光学加工后的光学平面，实施酸性物质处理和偶联剂处理；6. Carry out acidic substance treatment and coupling agent treatment to the optical plane after the optical processing of the sheet laser neodymium glass and the absorbing glass slat;
⑦用所述的有机粘接剂，将所述的吸收玻璃板条紧密地粘贴在所述的片状激光钕玻璃的相应的侧边上；7. Using the organic adhesive, the absorbing glass slats are closely pasted on the corresponding sides of the sheet laser neodymium glass;
⑧将周边都粘贴了所述的吸收玻璃板条的所述的片状激光钕玻璃进行外部尺寸整形，对所述的片状激光钕玻璃的通光面进行精密抛光并达到设计要求。⑧ Reshaping the outer dimensions of the sheet-shaped laser neodymium glass with the absorbing glass slats pasted on its periphery, and precisely polishing the light-transmitting surface of the sheet-shaped laser neodymium glass to meet the design requirements.
所述的吸收玻璃为掺杂氧化铜的磷酸盐玻璃，该吸收玻璃掺杂氧化铜的重量百分比为0.1％～1％。The absorption glass is phosphate glass doped with copper oxide, and the weight percentage of the absorption glass doped with copper oxide is 0.1%-1%.
所述的有机粘接剂在固化过程中无挥发性组分产生；所述的有机粘接剂在固化过程中体积收缩率低于7％。The organic adhesive does not produce volatile components during the curing process; the volume shrinkage of the organic adhesive is lower than 7% during the curing process.
所述的偶联剂为硅烷偶联剂或钛酸酯偶联剂，所述的偶联剂处理是将所述的硅烷偶联剂或钛酸酯偶联剂溶解在稀乙酸中，将需要处理的光学面浸泡在所述的硅烷偶联剂或钛酸酯偶联剂的酸溶液中进行处理。Described coupling agent is silane coupling agent or titanate coupling agent, and described coupling agent treatment is that described silane coupling agent or titanate coupling agent are dissolved in dilute acetic acid, will need The treated optical surface is soaked in the acid solution of the silane coupling agent or titanate coupling agent for treatment.
所述的酸性物质为乙酸，该乙酸的配制浓度0.2mol/L，浸泡处理所述的钕玻璃侧边和所述的吸收玻璃板条的光学平面。The acidic substance is acetic acid, the concentration of which is 0.2 mol/L, and the side of the neodymium glass and the optical plane of the absorbing glass strip are soaked.
所述的激光玻璃侧边和所述的吸收玻璃板条相互粘贴的光学平面的加工精度要求达到2级或2级以上光洁度，平整度达到或优于4λ。The processing accuracy of the optical plane on which the sides of the laser glass and the absorbing glass slats are attached to each other is required to reach level 2 or above smoothness, and the flatness to reach or be better than 4λ.
所述的激光钕玻璃的侧边与该激光钕玻璃的通光面的垂直面具有1°～4°的倾角，且相对侧面的倾角相互平行。The side of the laser neodymium glass has an inclination angle of 1°-4° to the vertical surface of the light-transmitting surface of the laser neodymium glass, and the inclination angles of opposite sides are parallel to each other.
实施例1，四边形片状激光钕玻璃抑制放大自发辐射的方法，
请参阅图1至图5，图1为本发明实施例1的片状激光钕玻璃长侧边和吸收玻璃板条配置示意图。图2为本发明实施例1的片状激光钕玻璃长侧边和吸收玻璃板条粘贴示意。图3为本发明实施例1的片状激光钕玻璃短侧边和吸收玻璃板条配置示意图。图4为本发明实施例1的片状激光钕玻璃长侧边和吸收玻璃板条粘贴示意图。图5为本发明实施例1的片状激光钕玻璃外形尺寸整形及通光面精密抛光后的结构示意图。本发明抑制大尺寸片状激光钕玻璃放大自发辐射的方法，包括下列步骤：Please refer to FIG. 1 to FIG. 5 . FIG. 1 is a schematic diagram of the arrangement of the long sides of the sheet-shaped laser neodymium glass and the absorbing glass slats according to
①选取与所述的片状激光钕玻璃相匹配的吸收玻璃，该吸收玻璃的热膨胀系数与所述的片状激光钕玻璃的热膨胀系数的差值小于2％，所述的吸收玻璃在激光波长的折射率n1大于所述片状激光钕玻璃在激光波长的折射率n2，且n1-n2＝0.0005～0.005；选取有机粘接剂，该有机粘接剂和所述片状激光钕玻璃在激光波长的折射率匹配，所述的有机粘接剂在激光波长的折射率n3，要求满足关系式：n2＜n3＜n1；本实施例的激光钕玻璃在1053nm折射率n2、吸收玻璃在1053nm折射率n1和有机粘接剂在1053nm折射率n3相匹配，例如n1＝1.535并且n2＝1.533，那么n3匹配到1.534是合适的。吸收玻璃30℃-300℃的热膨胀系数α1与激光钕玻璃30℃-300℃的热膨胀系数α2相匹配，例如α2＝120×10-7，那么α1匹配到(118～122)×10-7是合适的。① Select the absorbing glass that matches the sheet laser neodymium glass, the difference between the thermal expansion coefficient of the absorbing glass and the thermal expansion coefficient of the sheet laser neodymium glass is less than 2%. The refractive index n1 of the sheet-shaped laser neodymium glass is greater than the refractive index n2 of the laser wavelength, and n1 -n2 =0.0005～0.005; an organic adhesive is selected, and the organic adhesive and the sheet-shaped laser The refractive index of the neodymium glass matches the laser wavelength, and the refractive indexn3 of the organic adhesive at the laser wavelength is required to satisfy the relational formula:n2 <n3 <n1; the laser neodymium glass of this embodiment refracts at 1053nm The ratio n2 , the refractive index n1 of the absorbing glass at 1053 nm and the refractive index n3 of the organic adhesive at 1053 nm match, for example, n1 =1.535 and n2 =1.533, then it is appropriate to match n3 to 1.534. The thermal expansion coefficient α1 of the absorbing glass at 30°C-300°C matches the thermal expansion coefficient α2 of the laser neodymium glass at 30°C-300°C, for example α2 =120×10-7 , then α1 is matched to (118～122)× 10-7 is suitable.
②对所述的片状激光钕玻璃的周边的相间隔的侧边进行光学加工，将片状激光钕玻璃1的长侧边1.1和长侧边1.2进行光学加工，光学加工达到2级光洁度要求并且达到4λ平整度要求，根据所述的片状激光钕玻璃的相间隔的长侧边的尺寸，选配尺寸相适应的吸收玻璃板条，并对所述的吸收玻璃板条进行光学加工；将两块吸收玻璃板条2的表面2.3和表面2.4进行光学加工，光学加工达到2级光洁度要求并且达到4λ平整度要求。② Carry out optical processing on the spaced sides of the periphery of the sheet-shaped laser neodymium glass, and perform optical processing on the long side 1.1 and long side 1.2 of the sheet-shaped
③对所述的片状激光钕玻璃的长侧边1.1和长侧边1.2和所述的吸收玻璃板条的表面2.3和表面2.4进行光学加工后的光学平面，进行洁净处理，并进行乙酸处理和硅烷偶联处理。实施酸性物质处理和偶联剂处理；③ The long side 1.1 and long side 1.2 of the sheet-shaped laser neodymium glass and the surface 2.3 and surface 2.4 of the absorbing glass slab are optically processed, and the optical plane is cleaned and treated with acetic acid And silane coupling treatment. Implement acidic substance treatment and coupling agent treatment;
④用所述的有机粘接剂，将所述的吸收玻璃板条紧密地粘贴在所述的片状激光钕玻璃的相应的侧边上；如图2所示，将配制好的有机粘接剂涂敷于激光钕玻璃长侧边1.1和长侧边1.2、吸收玻璃表面2.3和表面2.4，进行粘接、固化。④ Use the organic adhesive to stick the absorbing glass slats tightly on the corresponding sides of the sheet-shaped laser neodymium glass; as shown in Figure 2, the prepared organic adhesive The agent is applied to the long side 1.1 and long side 1.2 of the laser neodymium glass, the surface 2.3 and the surface 2.4 of the absorbing glass for bonding and curing.
⑤如图3所示，将所述的两长侧边粘接好吸收玻璃的片状激光钕玻璃1的两短侧边1.5和1.6进行光学加工，光学加工达到2级光洁度要求并且达到4λ平整度要求，对应的，将吸收玻璃板条3的表面3.7和表面3.8进行光学加工，光学加工达到2级光洁度要求并且达到4λ平整度要求。对所述的片状激光钕玻璃尚未粘贴吸收玻璃板条的侧边一一进行光学加工，根据所述的片状激光钕玻璃尚未粘贴吸收玻璃板条的侧边的尺寸，配备尺寸相适应的吸收玻璃板条，对所述的吸收玻璃板条进行光学加工；⑤ As shown in Figure 3, optically process the two short sides 1.5 and 1.6 of the sheet-shaped
⑥对所述的片状激光钕玻璃和所述的吸收玻璃板条进行光学加工后的光学平面，实施酸性物质处理和偶联剂处理，激光钕玻璃短侧边1.5和短侧边1.6、吸收玻璃表面3.7和表面3.8进行洁净处理，并进行乙酸处理和硅烷偶联剂处理；6. The optical plane after the optical processing of the sheet-like laser neodymium glass and the absorbing glass slab is subjected to acid treatment and coupling agent treatment. The glass surface 3.7 and surface 3.8 are cleaned, and treated with acetic acid and silane coupling agent;
⑦如图4所示，将配制好的有机粘接剂涂敷于激光钕玻璃短侧边1.5和短侧边1.6、吸收玻璃表面3.7和表面3.8，进行粘接、固化。⑦ As shown in Figure 4, apply the prepared organic adhesive to the short side 1.5 and short side 1.6 of the laser neodymium glass, the surface 3.7 and the surface 3.8 of the absorbing glass, and perform bonding and curing.
⑧如图5所示，将四侧边粘接吸收玻璃的激光钕玻璃进行外部尺寸整形，将所述的粘接吸收玻璃的激光钕玻璃通光面进行精密抛光，透过波前畸变达到或小于λ/4，即可用作为激光放大器材料。8. As shown in Figure 5, the outer dimensions of the laser neodymium glass bonded to the absorbing glass on four sides are reshaped, and the light-transmitting surface of the laser neodymium glass bonded to the absorbing glass is precisely polished, and the wavefront distortion reaches or If it is less than λ/4, it can be used as a laser amplifier material.
所述的吸收玻璃为掺杂氧化铜的磷酸盐玻璃，该吸收玻璃掺杂氧化铜的重量百分比为1％。The absorption glass is phosphate glass doped with copper oxide, and the weight percentage of the absorption glass doped with copper oxide is 1%.
所述的有机粘接剂在固化过程中无挥发性组分产生；所述的有机粘接剂在固化过程中体积收缩率低于7％。The organic adhesive does not produce volatile components during the curing process; the volume shrinkage of the organic adhesive is lower than 7% during the curing process.
所述的偶联剂为硅烷偶联剂，所述的偶联剂处理是将所述的硅烷偶联剂或钛酸酯偶联剂溶解在稀乙酸中，将需要处理的光学面浸泡在所述的硅烷偶联剂或钛酸酯偶联剂的酸溶液中进行处理。The coupling agent is a silane coupling agent, and the treatment of the coupling agent is to dissolve the silane coupling agent or titanate coupling agent in dilute acetic acid, soak the optical surface to be treated in the The acid solution of the above-mentioned silane coupling agent or titanate coupling agent is processed.
所述的酸性物质为乙酸，该乙酸的配制浓度0.2mol/L，浸泡处理所述的钕玻璃侧边和所述的吸收玻璃板条的光学平面。The acidic substance is acetic acid, the concentration of which is 0.2 mol/L, and the side of the neodymium glass and the optical plane of the absorbing glass strip are soaked.
所述的激光钕玻璃的侧边与该激光钕玻璃的通光面的垂直面具有1°倾角，且相对侧面的倾角相互平行。The sides of the laser neodymium glass have an inclination angle of 1° to the vertical plane of the light-transmitting surface of the laser neodymium glass, and the inclination angles of opposite sides are parallel to each other.
所述的有机粘接剂，在应用于激光钕玻璃包边的过程中，需检测所述有机粘接剂固化后的折射率，应和所述激光钕玻璃折射率匹配。In the process of applying the organic adhesive to laser neodymium glass edging, it is necessary to detect the refractive index of the organic adhesive after curing, which should match the refractive index of the laser neodymium glass.
实施例2：Example 2:
本实施例的形状和实施步骤同实施例1，不同点在于：The shape and implementation steps of this embodiment are the same as
所述的吸收玻璃为掺杂氧化铜的磷酸盐玻璃，该吸收玻璃掺杂氧化铜的重量百分比为0.5％。The absorption glass is phosphate glass doped with copper oxide, and the weight percentage of the absorption glass doped with copper oxide is 0.5%.
所述吸收玻璃板条的外形尺寸，长度方向比所述激光钕玻璃侧边长2mm或以上，所述吸收玻璃宽度方向比所述激光钕玻璃厚度宽1mm或以上。用酸溶液处理所述的光学平面，移至无尘室中进行偶联处理，清理、干燥后准备操作。所述的有机粘接剂经过减压抽滤处理，去除有机粘接剂中的细小固态物质。应用所述的有机粘接剂将所述的吸收玻璃紧密粘接在所述的激光钕玻璃侧边。控制所述的有机粘接剂层的厚度。The external dimensions of the absorbing glass slabs are 2 mm or more longer than the sides of the laser neodymium glass in the longitudinal direction, and 1 mm or more wider than the thickness of the laser neodymium glass in the width direction of the absorbing glass. The optical plane is treated with an acid solution, moved to a clean room for coupling treatment, cleaned and dried, and ready for operation. The organic adhesive is treated by suction filtration under reduced pressure to remove fine solid matter in the organic adhesive. The said absorbing glass is tightly bonded to the side of said laser neodymium glass by using said organic adhesive. Controlling the thickness of the organic adhesive layer.
所述的偶联剂为钛酸酯偶联剂，所述的偶联剂处理是将所述的硅烷偶联剂或钛酸酯偶联剂溶解在稀乙酸中，将需要处理的光学面浸泡在所述的硅烷偶联剂或钛酸酯偶联剂的酸溶液中进行处理。The coupling agent is a titanate coupling agent, and the treatment of the coupling agent is to dissolve the silane coupling agent or titanate coupling agent in dilute acetic acid, soak the optical surface to be treated The treatment is carried out in the acid solution of the silane coupling agent or titanate coupling agent.
所述的激光钕玻璃的侧边与该激光钕玻璃的通光面的垂直面具有4°的倾角，且相对侧面的倾角相互平行。The sides of the laser neodymium glass have an inclination angle of 4° to the vertical plane of the light-transmitting surface of the laser neodymium glass, and the inclination angles of opposite sides are parallel to each other.
实施例3：八边形片状激光钕玻璃抑制放大自发辐射的方法Example 3: Method for Suppressing Amplified Spontaneous Emission by Octagonal Sheet Laser Neodymium Glass
请参阅图6至图9，图6为本实施例3八边形片状激光钕玻璃四斜边和吸收玻璃板条配置示意图。图7为本实施例3八边形片状激光钕玻璃的四斜边和吸收玻璃板条粘贴后的结构示意图。图8为本实施例3八边形片状激光钕玻璃四直边和吸收玻璃板条配置示意图。图9为本实施例3八边形片状激光钕玻璃外形尺寸整形及通光面精密抛光后的结构示意图。Please refer to Fig. 6 to Fig. 9, Fig. 6 is a schematic diagram of arrangement of octagonal laser neodymium glass sheet with four hypotenuses and absorbing glass slats in
选取与激光钕玻璃匹配的吸收玻璃和有机粘接剂，同实施例1。所述吸收玻璃掺杂氧化铜重量百分比为0.1％。Select the absorbing glass and organic adhesive that match the laser neodymium glass, the same as in Example 1. The weight percent of the absorbing glass doped with copper oxide is 0.1%.
如图6所示，将激光钕玻璃4的斜侧边4.1～斜侧边4.4、吸收玻璃5的表面5.5～表面5.8进行光学加工，光学加工要求和实施例1相同，光学表面处理、粘接和实施例1相同。如图7所示，将配制好的有机粘接剂涂敷于激光钕玻璃4的斜侧边4.1～斜侧边4.4、吸收玻璃板条5的表面5.5～表面5.8，进行粘接、固化。如图8所示，四边粘接吸收玻璃的激光钕玻璃，对激光钕玻璃4的直侧边4.9～直侧边4.12进行光学加工，对应的，将吸收玻璃6的表面6.13～表面6.16进行光学加工，光学加工要求和实施例1相同，光学表面处理、粘接和实施例1相同。如图9所示，将侧边粘接吸收玻璃的激光钕玻璃进行外部尺寸整形，将所述的粘接吸收玻璃的激光钕玻璃通光面进行精密抛光，透过波前畸变达到或小于λ/4。As shown in Figure 6, the oblique side 4.1 to the oblique side 4.4 of the
本实施例中，所述的激光钕玻璃的侧边与该激光钕玻璃的通光面的垂直面具有2°的倾角，且相对侧面的倾角相互平行。In this embodiment, the side of the laser neodymium glass has an inclination angle of 2° to the vertical plane of the light-transmitting surface of the laser neodymium glass, and the inclination angles of the opposite sides are parallel to each other.
实施例4：Example 4:
本实施例的结构和步骤同实施例3.The structure and steps of this embodiment are the same as
选取与激光钕玻璃匹配的吸收玻璃和有机粘接剂同实施例1。所述吸收玻璃掺杂氧化铜重量百分比为1％。The absorbing glass and organic adhesive selected to match the laser neodymium glass are the same as in Example 1. The weight percentage of the absorption glass doped with copper oxide is 1%.
如图6所示，将激光钕玻璃4的侧边4.1～侧边4.4、吸收玻璃5的表面5.5～表面5.8进行光学加工，光学加工要求和实施例1相同，光学表面进行洁净处理，粘接和实施例1相同。如图7所示，将配制好的有机粘接剂涂敷于激光钕玻璃4的侧边4.1～侧边4.4、吸收玻璃5的表面5.5～表面5.8，进行粘接、固化。如图8所示，四边粘接吸收玻璃的激光钕玻璃，对激光钕玻璃4的侧边4.9～侧边4.12进行光学加工，对应的，将吸收玻璃6的表面6.13～表面6.16进行光学加工，光学加工要求和实施例1相同，光学表面进行洁净处理，粘接和实施例1相同。如图9所示，将侧边粘接吸收玻璃的激光钕玻璃进行外部尺寸整形，将所述的粘接吸收玻璃的激光钕玻璃通光面进行精密抛光，透过波前畸变达到或小于λ/4。As shown in Figure 6, the side 4.1-side 4.4 of the
本实施例中所述的激光钕玻璃的侧边与该激光钕玻璃的通光面的垂直面没有倾角。The side of the laser neodymium glass described in this embodiment has no inclination angle to the vertical plane of the light-transmitting surface of the laser neodymium glass.
实验表明，本发明方法可有效地抑制大尺寸片状激光钕玻璃放大自发辐射和寄生振荡，增益性能接近理论计算水平，满足高功率激光装置的使用要求。Experiments show that the method of the invention can effectively suppress the amplified spontaneous emission and parasitic oscillation of the large-size sheet laser neodymium glass, the gain performance is close to the theoretical calculation level, and meets the use requirements of high-power laser devices.
最后所说明的是，以上实施例仅用于说明本发明的技术方案而非限制。尽管参照最佳实施例对本发明进行了详细说明，本领域的技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围，其均应涵盖在本发明的权利要求范围中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit. Although the present invention has been described in detail with reference to the preferred embodiment, those skilled in the art should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention, which should be covered in within the scope of the claims of the present invention.
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