LDA抽运Nd∶YAG/KTP腔内和频589nm连续波激光器

报道了一种激光二极管阵列(LDA)抽运Nd∶YAG双波长和频黄光激光器.黄激光是由Nd∶YAG晶体的1064 nm和1319 nm谱线腔内和频产生.以KTP为和频晶体,采用Ⅱ类临界相位匹配,在12 W的808 nm抽运功率下,获得了最高功率为430 mW连续波基横模的589 nm黄激光输出,光光转换效率为3.6%,光束质量因子M2<1.2.实验结果表明采用激光二极管阵列抽运Nd∶YAG/KTP腔内和频技术是获得黄激光的高效方法,并可以应用到其它激光增益介质的两条谱线进行腔内和频,获得更多不同颜色的单谱线激光输出.     

LDA抽运Nd:YAG/KTP腔内和频589 nm连续波激光器

报道了一种激光二极管阵列（LDA）抽运Nd:YAG双波长和频黄光激光器黄激光是由Nd:YAG晶体的1064 nm和1319 nm谱线腔内和频产生以KTP为和频晶体,采用Ⅱ类临界相位匹配,在12 W的808 nm抽运功率下,获得了最高功率为430 mW连续波基横模的589 nm黄激光输出,光光转换效率为3.6%,光束质量因子M2<1.2实验结果表明采用激光二极管阵列抽运Nd:YAG/KTP腔内和频技术是获得黄激光的高效方法,并可以应用到其它激光增益介质的两条谱线进行腔内和频,获得更多不同颜色的单谱线激光输出     

LD抽运腔内和频571.6nm连续波黄光激光器

报道了全固态连续波571.6nm黄光激光器.黄激光是分别由两片Nd∶YAG的1444nm和946nm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4F3/2-4I15/2和4F3/2-4I9/2.实验中采用复合腔结构,利用RTP晶体II类临界相位进行内腔和频,当注入到两片Nd∶YAG晶体的抽运功率分别为25W和14.8W时,获得562mW的连续波571.6nm黄激光输出,4h功率稳定度优于±2.9%.     

LD抽运Nd:YVO4/KTP复合腔和频黄光激光器

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.     

LD泵浦Nd:YAG 946 nm/1 064 nm双波长运转及腔内和频

用国产半导体激光二极管(LD)端面泵浦NdYAG晶体, 通过优化激光谐振腔反射膜系,调节1 064 nm谱线的线性损耗以达到与弱谱线946 nm的增益匹配,在室温下实现1 064 nm和946 nm双波长连续运转,并通过I类临界相位匹配LBO晶体腔内和频在国内首次实现500.8 nm青色激光连续输出.当泵浦注入功率为1.4W时和频青色激光最大输出达20 mW,光-光转换效率为1.4%,功率稳定性24 h内优于±3%.     

LD抽运腔内和频571.6 nm连续波黄光激光器

报道了全固态连续波571.6 nm黄光激光器.黄激光是分别由两片Nd∶YAG的1 444 nm和946 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4F3/2-4I15/2和4F3/2-4I9/2.实验中采用复合腔结构,利用RTP晶体II类临界相位进行内腔和频,当注入到两片Nd∶YAG晶体的抽运功率分别为25 W和14.8 W时,获得562 mW的连续波571.6 nm黄激光输出,4 h功率稳定度优于±2.9％.     

高功率,红光至中红外可调谐腔内和频光学参量振荡器

本文利用高重复频率,高平均功率大模场面积飞秒光纤激光器作为同步抽运源,抽运以多周期极化掺氧化镁铌酸锂为非线性晶体的单共振光学参量振荡器,获得了高功率可调谐红光至中红外光,信号光调谐范围为1450—2200 nm,闲频光调谐范围为2250—4000 nm,在2 W的抽运功率下,信号光输出波长为1502 nm时获得最大输出功率374 mW,转换效率为18.7%,脉冲宽度为144 fs,此时中红外输出中心波长为3.4μm,平均功率为166 mW.再利用BBO晶体对信号光进行腔内和频,获得和频光输出波长调谐范围为610—668 nm,在4.1 W抽运的情况下,最高平均功率为615 nm处的694 mW,转换效率达16.9%.     

宽带可调谐单频窄线宽光纤激光器

设计出一种集可调谐带通滤波器、高精度环形滤波器和光纤环形镜于一体的全光纤复合腔结构可调谐单频窄线宽光纤激光器。采用980 nm半导体激光器作为抽运源,掺镱光纤在谐振腔内分别作为增益介质和可饱和吸收体,成功实现波长为1030～1090 nm稳定的宽谱可调谐单频窄线宽激光输出。当抽运光的抽运功率为300 mW时,在波长为1070 nm处得到的输出功率最大,为18.5 mW,斜率效率达到7.95%,持续1 h内没有出现跳模现象,功率不稳定性小于1%;当抽运功率为200 mW时,利用延迟自外差法测量线宽,得到波长调谐范围内的平均线宽为8.7 kHz,弛豫振荡频率为64 kHz。     

激光二极管抽运Nd:YV04和频黄光激光器的理论及实验研究

为了达到最佳和频593 nm黄色激光输出,采用激光二极管(LD)端面抽运Nd:YVO4晶体,根据四能级系统的速率方程理论,建立了空间相关的两波长激光运转速率方程模型,由此导出两波光子数表达式.对LD端面抽运Nd:YVO4/KTP三镜复合腔结构的腔内和频黄光激光器,在满足参与和频的两基频光光子数密度相等的条件下,理论上得到了谐振腔的各个参数.实验比较了在满足两波光子数密度相等和两波振荡阈值相等两种情况下激光器输出的593 nm黄色激光功率.在抽运功率为12 W时,二种情况下分别得到了410 mW和340 mW的黄光输出,光一光转换效率分别为3.4%和2.8%.由此可见,在满足两波光子数密度相等的条件下可以得到更高转换效率的和频黄光输出.     

激光二极管抽运Nd∶YVO_4和频黄光激光器的理论及实验研究

为了达到最佳和频593nm黄色激光输出,采用激光二极管(LD)端面抽运Nd∶YVO4晶体,根据四能级系统的速率方程理论,建立了空间相关的两波长激光运转速率方程模型,由此导出两波光子数表达式。对LD端面抽运Nd∶YVO4/KTP三镜复合腔结构的腔内和频黄光激光器,在满足参与和频的两基频光光子数密度相等的条件下,理论上得到了谐振腔的各个参数。实验比较了在满足两波光子数密度相等和两波振荡阈值相等两种情况下激光器输出的593nm黄色激光功率。在抽运功率为12W时,二种情况下分别得到了410mW和340mW的黄光输出,光-光转换效率分别为3.4%和2.8%。由此可见,在满足两波光子数密度相等的条件下可以得到更高转换效率的和频黄光输出。     

周期极化KTiOPO4晶体和频单块非平面环形腔激光产生连续单频589nm黄光

单次通过周期极化KTiOPO₄晶体和频单块非平面环形腔1064 nm与1319 nm激光产生连续单频589 nm黄光. 通过琼斯矩阵模拟计算对单块非平面Nd:YAG晶体参数进行了优化设计, 实验获得1080 mW和580 mW的连续单频1064 nm和1319 nm激光输出. 两束激光单次通过周期极化KTiOPO₄晶体和频产生14.8 mW, M²=1.14的589 nm黄光, 相应的和频效率为0.9%. 研究了周期极化KTiOPO₄温度对和频效率的影响, 得到其温度接收带宽为1.5℃. 通过改变1064 nm Nd:YAG晶体的温度可实现589 nm黄光波长精确对应钠原子D_2a吸收谱线, 调谐精度达到0.164 pm.     

All-solid-state side-pumped intracavity sum frequency generation yellow laser at 589 nm with the output power of 11.4 W

A laser diode side pump all-solid-state pulse laser at 589 nm with high power and high conversion efficiency and small volume is demonstrated by intracavity sum frequency generation. By optimizing the cavity and adopting etalon techniques, a quasi continuous wave at 589 nm laser source, which has a maximum output power of 11.4 W, a repetition rate of 5 kHz, and a pulse width of 135 ns, is developed. The optical to optical conversion efficiency is up to 6.5% and the power stability is better than 2% in 8 hours.     

600 mW optical output power at 488 nm by use of a high-power hybrid laser diode system and a periodically poled MgO:LiNbO3 bulk crystal

600 mW second-harmonic blue light at 488 nm has been generated by use of a master-oscillator power amplifier diode laser system as a pump source with a maximum optical output power of 4 W in continuous-wave operation. For frequency doubling, a periodically poled MgO:LiNbO3 bulk crystal was used in a single-pass configuration. A conversion efficiency of 15% and an overall wall-plug efficiency of 4% were achieved.     

Multiwavelength L-band fiber laser with bismuth-oxide EDF and photonic crystal fiber

A multiwavelength laser comb using a bismuth-based erbium-doped fiber and 50 m photonic crystal fiber is demonstrated in a ring cavity configuration. The fiber laser is solely pumped by a single 1455 nm Raman pump laser to exploit its higher power delivery compared to that of a single-mode laser diode pump. At 264 mW Raman pump power and 1 mW Brillouin pump power, 38 output channels in the L-band have been realized with an optical signal-to-noise ratio above 15 dB and a Stokes line spacing of 0.08 nm. The laser exhibits a tuning range of 12 nm and produces stable Stokes lines across the tuning range between Brillouin pump wavelengths of 1603 nm and 1615 nm.     

双重复频率锁模Yb:YAG陶瓷激光器

近年来,双重复频率锁模激光器在诸如双光梳光谱和异步光学采样等应用领域吸引了广泛关注.基于单一激光腔的双梳系统能大大降低成本,简化系统结构,且性能优异.双重复频率锁模激光器为发展紧凑型和实用型双梳装置开辟了道路.本文报道了一种可用作双光梳光谱系统光源的双重复频率锁模Yb:YAG陶瓷激光器.该激光器基于半导体可饱和吸收镜锁模技术,采用双通道抽运结构,利用新型非水基流延成型制备的Yb:YAG透明陶瓷,在单一的五镜腔中,当吸收抽运光功率为5.6 W时,实现了自启动、稳定运转的双重复频率锁模脉冲Pulse1和Pulse2,其重复频率分别为448.918和448.923 MHz,重复频率差为5 kHz.在吸收抽运功率为7 W时,得到最大的总平均输出功率170 mW,其中Pulse1和Pulse2的功率分别为89和81 mW,相应的光谱宽度分别为1和1.16 nm.性能相似的双重复频率脉冲彼此间保持了良好的相干性,实验结果证明了双通道抽运在双重复频率锁模激光器应用中的可行性,此种新型双重复频率激光器在双光梳光谱和测距等领域具有较好的应用潜力.     

Low-pump sum frequency generation of frequency-stabilized 453 nm blue laser for photonic quantum interface

Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the photon source, the pump laser for the narrow-band photon source should be generated in a special way. Here, we experimentally generate the blue 453 nm laser with a sum frequency generation process in a periodically poled lithium niobate waveguide. A 13 mW laser at 453 nm can be achieved with a low-power 880 nm laser and 935 nm laser input, and the internal conversion efficiency is 21.6% after calculation. The frequency of a 453 nm laser is stabilized by locking two pump lasers on one ultrastable optical cavity. The single pass process without employing cavity enhancement can ensure a good robustness of the whole system.     

Analytical and Experimental Studies on Nd:YVO4/KTP Lasers Pumped by High-brightness Laser Diodes

We report analytical and experimental studies on the characteristics of a high-brightness laser diode endpumped Nd:YVO₄/KTP laser. A simple model was developed to optimize the cavity parameters and estimate the green output power of intracavity frequency doubled lasers. Using a 1 W high-brightness laser diode as the pump source, high efficiency operation was realized. The second-harmonic output power at 532 nm was measured to be 286.5 mW at an incident pump power of 881.4 mW, corresponding to an optical to optical efficiency of 32.5%.     

LBO晶体和频产生589 nm激光的数值模拟及实验研究

 基于非线性光学理论,分析了1 064 nm和1 319 nm和频产生589 nm激光源的理论基础。针对LBO晶体的I类相位匹配条件及最佳晶体长度的选择进行了计算机数值模拟,给出了最佳晶体长度与总入射功率的关系曲线。当波矢量与光轴夹角为90°,波矢量方位角为3.39°时,计算出相应的有效和频系数为0.952×10^-12 m/V。设计了一种简便高效的实验和频方案,二极管泵浦Nd:YAG激光器经腔镜镀膜及腔内可倾斜标准具调谐,分别输出了波长为1 064 nm和1 319 nm的准连续激光,然后通过脉冲同步调节,实现了589 nm黄光输出,平均功率达到500 mW,光束质量因子M2约2.1,和频效率18%。     

激光二极管端泵微片固体激光器的研究

本文介绍了一种用波长为809nm的激光二极管(LD)端面泵浦厚度为1mm的微片Nd:YVO4全固化固体激光器。器件结构上采用了一种独特的光学系统,该系统由分别用于LD激光束的耦合和聚焦的两部分组成。由Nd:YVO4的一个平面与一个曲率半径为21mm的球面镜组成半共焦腔,以获得高的转换效率。文中详细讨论了单横模运转时的泵浦光与激光腔模之间的匹配问题。当泵浦光功率为400mW时,获得152mW的1064nm波长的TEM00模激光输出。器件阈值功率为48.3mW,总的光-光转换效率为38%,斜效率为43%.