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1.
为了获得百瓦级激光二极管侧面泵浦绿光激光器,设计了双棒串接、双声光调Q的Z型谐振腔结构.依据光束传输矩阵,通过软件模拟并计算了激光晶体内基模半径随屈光度的变化以及倍频晶体附近腔内光场在子午面和弧矢面内的分布情况,筛选出理想的谐振腔参数.在总泵浦功率1 080 W,声光调Q重复频率为10 kHz时,获得532 nm绿光最大平均输出功率为174.1 W,脉冲宽度为160 ns,光-光转换效率为16.1%,光束质量因子M2x=9.63,M2y=9.78.实验结果表明,使用双棒串接、双声光调制Z型腔结构,可以获得百瓦级高功率高光束质量532 nm绿光输出. 相似文献
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为了获得百瓦级激光二极管侧面泵浦绿光激光器,设计了双棒串接、双声光调Q的Z型谐振腔结构。依据光束传输矩阵,通过软件模拟并计算了激光晶体内基模半径随屈光度的变化以及倍频晶体附近腔内光场在子午面和弧矢面内的分布情况,筛选出理想的谐振腔参数。在总泵浦功率1080W,声光调Q重复频率为10kHz时,获得532nm绿光最大平均输出功率为174.1W,脉冲宽度为160ns,光-光转换效率为16.1%,光束质量因子M2x=9.63,M2y=9.78。实验结果表明,使用双棒串接、双声光调制Z型腔结构,可以获得百瓦级高功率高光束质量532nm绿光输出。 相似文献
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为了产生频差可调谐1 064nm双频激光输出,设计了一种扭转模结构双腔双频Nd∶YAG激光器,其两个驻波谐振腔共用相同的Nd∶YAG增益介质,以扭转模结构消弱增益空间烧孔效应,使Nd∶YAG激光器的两个驻波腔均以单纵模振荡,从而获得正交线偏振1 064nm双频激光输出.理论分析了扭转模结构激光单纵模选择原理和双频激光同时振荡原理,实验研究了双频激光振荡特性和频差调谐特性.研究结果表明:双频Nd∶YAG激光器的两个谐振腔能够同时以线偏振单纵模稳定振荡输出,其频差大小可随激光腔长的改变而调谐,频差调谐范围可达1个纵模间隔,实验观察到的频差调谐范围为0.3GHz~3GHz. 相似文献
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报道了高功率准连续波腔内和频全固态黄光激光器的研究结果.为获得高功率的黄光输出,首先,激光器采用准连续方式运转,在保持抽运水平的条件下降低热效应,从而提高光束质量和光光转换效率;第二,采用热近非稳腔腔型设计,双棒串接补偿热致双折射技术,获得大基模体积高光束质量的基频光;第三,通过优化腔型,采用L型共折叠臂平-凹对称腔,使两束基频光达到空间重合且满足功率配比.通过这些方法,得到了输出功率7.6W,重复频率1.1kHz的准连续波黄光输出.据我们所知,这是目前腔内和频方案所获得的最高功率全固态黄光输出.
关键词:
黄光激光
腔内和频
Nd:YAG激光
全固态激光器 相似文献
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固体激光器在强抽运的条件下,激光晶体热透镜的球差效应是不容忽视的,尤其是在大基模体积的动态稳定腔中,会影响谐振腔的振荡模式,进而影响腔内损耗和输出功率.通过Fox-Li的衍射迭代算法,分析了谐振腔的自再现模,表明在热透镜球差效应作用下,基模的光强分布出现了旁瓣,并由此带来了光束质量的下降,最后通过实验结果验证了理论分析,指出光束填充因子是激光器设计的一个重要因素,其最佳值需要根据球差效应的强弱,通过实验的方法来确定.
关键词:
热透镜
球差效应
谐振腔模式 相似文献
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利用多个激光晶体串接方式可以提高固体激光器的输出功率 发展双Nd∶YVO4 晶体激光器 ,将晶体的端面镀膜作为谐振腔的端面镜 ,构成了平行平面谐振腔 对平行平面谐振腔的等效腔进行了理论分析 ,结果表明激光晶体吸收泵浦光产生的热透镜效应对保持腔的稳定性起到了重要的作用 在国内首次进行了双端泵浦双Nd∶YVO4 激光器的实验研究 ,在抽运功率为 2 0 .74W时获得了 11W的 10 6 4nmTEM0 0 模激光输出 ,其光 光转化效率约为 5 3% 并且对于不同掺杂浓度下的实验结果进行了讨论 相似文献
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端面泵浦双Nd: YVO4激光器中热效应对腔稳定性的影响 总被引:7,自引:6,他引:1
利用多个激光晶体串接方式可以提高固体激光器的输出功率. 发展双Nd: YVO4晶体激光器, 将晶体的端面镀膜作为谐振腔的端面镜, 构成了平行平面谐振腔. 对平行平面谐振腔的等效腔进行了理论分析, 结果表明激光晶体吸收泵浦光产生的热透镜效应对保持腔的稳定性起到了重要的作用. 在国内首次进行了双端泵浦双Nd: YVO4激光器的实验研究, 在抽运功率为 20.74 W时获得了11 W的1064 nm TEM00模激光输出, 其光-光转化效率约为53%. 并且对于不同掺杂浓度下的实验结果进行了讨论. 相似文献
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We propose and demonstrate a simple approach to lower the thermal quenching
effect and improve the output power of Cr:LiSAF lasers, which is
accomplished by employing two laser rods. The resonator contains two laser
rods and is designed by using two ``X' folding cavities in cascade. A tunable
laser output of $\sim $ 180\,mW has been achieved with the pump of single-striped
laser diodes. Compared with lasers using single gain rod, the laser with
dual rods shows less severe thermal effect and increases the output by more
than two times. 相似文献
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C. Liu 《Laser Physics》2009,19(12):2155-2158
Two identically pumped Nd:YAG rods with a imaging system and a polarization rotator are used in experiments to achieve a complete
birefringence compensation. The measured depolarization ratio is from 1.0 to 2.5%, which increases with the increasing of
pump power. With a TEM00-mode operation, the depolarization ratio achieved is less than 1%. A dynamically stable resonator is performed using two
flat mirrors and an intra-cavity lens. 61 W linearly polarized output was achieved with a M
2 factor of 1.6, which is the state of the art for a lamp pumped laser. 相似文献
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角锥棱镜腔激光二极管抽运被动调Q激光器 总被引:4,自引:0,他引:4
为了提高传导冷却条件下激光二极管(LD)侧向抽运被动调Q激光器的光束质量和输出稳定性,采用了两组半圆柱面激光二极管阵列侧向交错抽运两根串接的激光棒,实现了均匀抽运和散热。通过实验分析了横模结构对被动调Q稳定性的影响,设计了角锥棱镜-高斯输出镜非稳腔,在显著提高器件光束质量的同时,明显改善了被动调Q的稳定性,并保证了谐振腔的机械稳定性。在此基础上研制了一台重复频率20 Hz、单脉冲能量64 mJ、脉冲宽度7 ns、稳定性优于±5%、光束发散角0.6 mrad、光-光效率9.1%,且光轴指向稳定的工程实用器件。 相似文献
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The two or multi-mode optically pumped NH3 FIR laser had been studied theoretically. The NH3 molecular gas was assumed to be a three-level system and obeyed the time-dependent behavior of the density matrix equations. Considering the situation of playing the two or multi-mode optical pumping and the FIR laser field were same polarized. The gain coefficient and the output FIR power of the system could be calculated by using the iteration method.It had been predicted that the two or multiple longitudinal mode optically pumped NH3 FIR laser could have a greater output power or higher lasing efficiency than single mode pumped FIR laser under suitable selected operating parameters of laser.Supported by The Education Foundation of PRC. 相似文献
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Lasers for materials processing: specifications and trends 总被引:2,自引:0,他引:2
K. Du J. Biesenbach D. Ehrlichmann U. Habich U. Jarosch J. Klein P. Loosen J. Niehoff R. Wester 《Optical and Quantum Electronics》1995,27(12):1089-1102
An overview is given of the types of lasers dominating the field of laser materials processing. The most prominent lasers in this field are the CO2 and the Nd: YAG laser. The domain of CO2 lasers is applications which demand high laser powers (up to 30 kW are available at present), whereas the domain of Nd:YAG lasers is micro-machining applications. In the kilowatt range of laser output power, the two types of lasers are in competition. New diffusion-cooled CO2 laser systems are capable of output laser powers of several kilowatts, with good beam qualities, while still being quite compact. The output power and beam quality of Nd:YAG lasers has been improved in recent years, so that Nd:YAG lasers are now an alternative to CO2 lasers even in the kilowatt range. This is especially true for applications that demand optical fibre transmission of the laser beam, which is possible with Nd:YAG laser light but not with the longerwavelength light emitted by CO2 lasers. The main problem in solid-state lasers such as Nd:YAG is the thermal lensing effect and damage due to thermal stresses. In order to reduce thermal loading, cooling has to be enhanced. Several alternative geometries have been proposed to reduce thermal loading and, by this, thermal lensing effects. There are now slab and tube geometries which allow much higher output powers than the conventionally used laser rods. A very new scheme proposes a thin slab whose cooled side is also used as one of the laser mirrors, so that thermal gradients occur mainly in the direction of the beam propagation and not perpendicular to it, as is the case in the other geometries. As well as CO2 and Nd:YAG lasers, semiconductor laser diodes are very promising for direct use of the emitted light or as pump sources for Nd:YAG and other solid-state lasers. When packaging together thousands of single laser diodes, output powers of several kilowatts can be realized. Major problems are collimation of the highly divergent laser beams and cooling of the laser diode bars. 相似文献
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Optically pumped laser action has been observed in dideuteroacetylene. A total of fifteen output wavelengths in the 17.4 to 20.5 μm region are produced, pumped by seven CO2 laser lines. The laser shows a number of unusual features, in particular pumping on hot bands and formally forbidden transitions and operation at high pressure (65 torr). Output energies were ~ 2 mJ from an unoptimised system. The temperature and pressure dependence of the output energy has been measured for typical lines. The time dependence of the output pulse varies markedly between the various output lines and suggests that one transition is Raman in origin. 相似文献
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Optical properties and laser performance of neodymium doped scheelites CaWO4 and NaGd(WO4)2 总被引:1,自引:0,他引:1
N. Faure C. Borel M. Couchaud G. Basset R. Templier C. Wyon 《Applied physics. B, Lasers and optics》1996,63(6):593-598
Nd-doped CaWO4 (CWO) and NaGd(WO4)2 (NGWO) single crystals with good optical quality have been grown by the Czochralski technique. The neodymium distribution coefficient in these matrices is about 0.4 for CWO and close to unity for NGWO. Polarized absorption and emission spectra have been recorded at room temperature and used to calculate the absorption and stimulated emission cross-sections.1 and 2% Nd : CWO and 1 % Nd:NGWO laser rods have been tested in a cavity longitudinaly pumped by an 1 W AIGaAs laser diode and compared to Nd : YAG and Nd:YVO4 rods in the same conditions. The 2% Nd: CWO rod exhibits the best performance with slope efficiencies of 64%, higher than in the case of YAG and equal to the YVO4 samples. The dependence of the laser output power versus the diode temperature has been measured for all these materials. The laser output of Nd: CWO was found to be nearly as stable as for Nd : YVO4 and much more stable than in the case of Nd : YAG. A CWO microchip has also been tested for the first time to our knowledge. 相似文献
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研究了Cr3+,Yb3+,Er3+共掺磷酸盐铒玻 璃转镜调Q激光性质.三种Er2O3掺杂浓度的激光实验结果表明,在Er2O3名义掺杂浓 度为0.5wt%时,玻璃的综合激 光性质最好,重复频率为0.1Hz时,它的激光阈值功率为14.5mJ,最大输出能量为9.6mJ ,斜率效率为0.55%.在同种实验条件下,比较了Cr14和Kigre公司生产的QE-7S激光性质参数,实验表明,前者激光阈值功率稍低,而后者的斜率效率和最大输出功率略高.
关键词:
3+-Yb3+-Er3+共掺')" href="#">Cr3+-Yb3+-Er3+共掺
磷酸 盐玻璃
光谱性质
激光性质 相似文献