共查询到19条相似文献,搜索用时 406 毫秒
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在Nd:YVO4晶体的4F3/2-4I13/2跃迁带内,除了1342 nm激光辐射之外,其它的跃迁谱线由于小的受激发射截面和强的寄生振荡,很难形成激光振荡。通过调整谐振腔损耗,获得了光纤耦合激光二极管端面抽运1386 nmNd∶YVO4激光器激光连续输出。在抽运功率达到4.24 W时,得到了305 mW的1386 nm激光连续输出,最高输出功率下的斜效率为13.9%。实验中还观察到了1342 nm和1386 nm的双波长运转。根据抽运阈值能量和实验数据,计算得到了Nd∶YVO4晶体中1386 nm激光辐射处的受激发射截面大约为(3±1)×10-19cm2。 相似文献
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报道了全固态连续波555 nm激光器.555 nm激光是分别由Nd:YAG和Nd:YVO4晶体的946 nm和1342 nm谱线非线性和频产生,两条谱线在各自晶体对应能级跃迁分别为4F3/2-4Ⅰ9/2和4F3/2-4Ⅰ13/2.实验中采用复合折叠腔结构,利用LBOI类临界相位进行腔内和频,当注入Nd:YAG和Nd:YVO4晶体的泵浦功率分别为20 W和10 W时,获得1.06 W的TEM00连续波555 nm激光输出.4小时功率稳定度优于±3.3%.实验结果表明采用两种激光晶体进行腔内和频是获得激光的高效方法,并可以应用到其它两种激光晶体进行腔内非线性和频,获得更多不同波长激光输出. 相似文献
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LD抽运Nd:YVO4/KTP复合腔和频黄光激光器 总被引:1,自引:0,他引:1
在LD抽运的三镜复合腔Nd:YVO4激光器中,采用Ⅱ类临界相位匹配的KTP晶体对1064 nm和1342 nm两种波长激光进行和频,获得593 nm黄光连续输出.理论上从速率方程出发,导出1064 nm激光谐振腔和1342 nm激光谐振腔腔长之间的关系以及两个腔的腔镜透过率之间的关系.实验中,当808 nm抽运光的功率为12 W时,和频输出的黄光功率为340 Mw.光-光转换效率为2.8%.结果表明,采用三镜复合腔结构进行腔内和频是实现593 nm黄光输出的一种有效方法. 相似文献
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高效率LD端面抽运准连续355nm激光器 总被引:1,自引:0,他引:1
报道了一台激光二极管(LD)端面抽运Nd∶YVO4晶体腔内倍频和腔外和频相结合的声光调Q准连续355 nm紫外激光器。采用LD端面抽运双侧翼键合YVO4基质的Nd∶YVO4晶体,在腔内置入Ⅰ类相位匹配的LiB3O5(LBO)晶体进行倍频实现1 064 nm和532 nm双波长准连续激光输出,通过消色差透镜将双波长激光聚焦耦合到Ⅱ类相位匹配的LBO晶体中进行和频,并采用双向和频光路,获得了高效率、高光束质量、高重复频率的准连续355 nm紫外激光输出。在抽运功率为28.6 W、重复频率为20 kHz时,355 nm激光最大输出功率4.2 W,脉宽为20.6 ns,光-光转换效率为14.7%,激光器光束质量因子Mx2和My2分别为1.29和1.23。 相似文献
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报道了激光二极管抽运的Nd∶YVO4晶体1342和671nm激光特性.1342nm激光最大输出功率为1.75W,光-光转换效率为32.1%,斜效率为43%.利用Ⅰ类非临界相位匹配LBO晶体腔内倍频,当输入抽运功率为6W时,获得功率为502mW的671nm激光输出,光-光转换效率超过8.3%;当671nm激光输出功率为400mW时,短期的不稳定度小于2%.
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Nd:YVO4是一种重要的激光晶体,广泛的应用到各种激光器中,本论文着重阐述不同的偏振光对应Nd:YVO4的受激发射截面不同从而导致该谱线的增益不同,并从实验上给出了定量的结果,实验表明对于a-cut的Nd:YVO4当偏振态由π到σ变化时,受激截面由21.5×1019cm2变化到14.3×10119cm2,对应的激光输出功率也由4.1 W变化到1.7 W.利用此原理提出了一种全新的弱增益谱线与强增益谱线的和频方法,并利用此方法实现了593.5 nm激光的运转. 相似文献
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激光二极管端面抽运的1342nmNd:YVO4激光器 总被引:1,自引:1,他引:0
报道了用高功率线列阵光纤耦合激光二极管端面抽运的1342nmDd:YVO4激光器,在13.30W输入抽运功率下,1342nm激光输出功率达到3.22W,斜效率为25.5%。输出功率不稳定度小于1%。 相似文献
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We report efficient generation of cw yellow light by use of single-pass sum-frequency mixing from a diode-pumped Nd:YVO(4) dual-wavelength laser with periodically poled lithium niobate. A diode-pumped Nd:YVO(4) dual-wavelength laser is implemented with a three-mirror cavity, and the optimum oscillation condition is obtained from theoretical analysis. We extracted 78 mW of power at 593 nm from 1.2 W at 1064 nm and from 1.0 W at 1342 nm in a beam with excellent quality. The output power could probably be increased to ~92 mW by antireflection coating of the crystal. 相似文献
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《中国光学快报(英文版)》2017,(7)
We demonstrate a continuous-wave(CW) dual-wavelength Nd:YVO4laser working at 1064 and 1066 nm simultaneously. The method of Nd:YVO4crystal angle tuning is used to balance the ratio of the stimulated emission cross sections of the two wavelengths, leading to the realization of a simultaneous dual-wavelength operation from only one laser. The experimental results show that at a 2.85 W pump power, the maximum output powers at wavelengths of 1064 and 1066 nm are 0.55 and 0.54 W, respectively. The linear resonate cavity is as short as 10 mm, which gives the laser the advantages of a miniature configuration and low threshold. Such a dual-wavelength laser can be very attractive for the development of compact THz sources based on difference frequency generation. 相似文献
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We report a continuous-wave (CW) yellow laser emission by sum-frequency mixing in Nd:YVO4 crystal. Using type-II critical phase-matching KTP crystal, a yellow laser at 593.5 nm is obtained by 1064 and 1342 nm intracavity sum-frequency mixing. The maximum laser output power of 2.1 W is obtained when an incident pump laser of 18.2 W is used. At the output power level of 2.1 W, the output stability is better than 3.2%. 相似文献
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H. Y. Shen R. F. Wu Z. D. Zeng W. X. Lin R. R. Zeng Y. P. Zhou G. F. Yu C. H. Huang 《中国光学快报(英文版)》2000,9(2)
A laser diode (LD) pumping high-stability 1047 nm TEM00 mode Nd: YLiF4 (Nd: YLF) continuous wave (CW) laser is reported in this letter. The laser output power of 5.83 W with optical to optical effidency of 27% and slope efficiency of 30% has been achieved The instability of output power is 0.36% and spike caused by relaxation oscillation has not been observed in the laser beam. The transverse cross section of laser beam is an ellipse, the diameters of laser beam at output mirror in both directions are 0.97 mm and 1.07 mm, respectively. The divergent angles are 0. 936 mrad and 0. 774 mrad, and the values of M2 are 1.37 and 1.24, respectively. The polarization degree of laser beam is better than 237:1. 相似文献
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H. Y. Shen R. F. Wu Z. D. Zeng W. X. Lin R. R. Zeng Y. P. Zhou G. F. Yu C. H. Huang 《Chinese Journal of Lasers》2000,9(2):103-106
1 IntroductionNd: YLF crystal belongs tO the tetragonal syStem with space group 1 4/ a and it isa POSitive single axial crystal in optics. The life-time Of fluorescence of Nd3 ions incaF crystal is lOnger, being 520 us. Therefore, it is a strong candidate for lasermedium of high stored energy and CW lasers. Especially, the therrnai focal distance OfNd: YLF crystal is much longer than that of Nd: YAG crystal and' so the Nd: YLFcrystal is Particularly suitable for a laser in TEWo m… 相似文献