激光二极管泵浦单频连续工作的Nd：YAG激光器

在国内首次报道了激光二极管泵浦单频连续工作的Ｎｄ：ＹＡＧ激光器，采用扭摆模腔技术方法，在８０８ｎｍ激光二极管连续泵浦下，取得１０６４ｎｍ连续单频工作，输出功率５５ｍＷ的结果，泵浦阈值２７６ｍＷ，斜率效率２３％，线宽小于２５ＭＨｚ（受仪器测量精度限制）。     

激光二极管泵浦Nd：LMA激光器的连续波输出研究

报道有一个３Ｗ激光二极管端面泵浦Ｎｄ：ＬＭＡ激光器，实验采用三镜折迭像散补偿腔。在１０５４ｎｍ波长，激光器连续输出功率达６２０ｍＷ，斜率效率为５０％，光－光转换效率２０％，在１０８３ｎｍ波长处，激光器连续输出功率为６４ｍＷ，斜率效率为６％，光转换效率２．１％。     

激光二极管泵浦Nd∶LMA激光器的连续波输出研究

报道用一个３Ｗ激光二极管端面泵浦Ｎｄ∶ＬＭＡ激光器。实验采用三镜折迭像散补偿腔。在１０５４ｎｍ波长，激光器连续输出功率达６２０ｍＷ，斜率效率为５０％，光－光转换效率２０％。在１０８３ｎｍ波长处，激光器连续输出功率为６４ｍＷ，斜率效率为６％，光－光转换效率２．１％。     

激光二极管直接耦合泵浦的高效率Nd：YVO4／KTP腔内倍频激光器

使激光二极管的发光光面紧贴Ｎｄ：ＹＶＯ４激光晶体，“面对面”直接耦合泵浦，采用ＫＴＰ晶体腔内倍频，在５０３ｍＷ的泵浦功率下，获得５３２ｎｍ基横模绿光输出约７３ｍＷ，光光总体转换效率为１４．５％。     

激光二极管泵浦的准连续运转飞秒Cr:LiSAF激光器

报道国内第一台用６７０ｎｍ激光二极管泵浦的准连续锁模运转的Ｃｒ：ＬｉＳＡＦ激光器。对于连续运转,泵浦阈值功率２４０ｍＷ,当吸收功率为３６８ｍＷ的输出,输出波长８５０ｎｍ,斜效率为３．５％。在准连续运转（１００ＨＺ,占空比１／５时）,泵清阈值功率４５ｍＷ,斜效率为９．８％,用染料作为锁模妄动介质,实现了准连续锁模运转,光脉冲输出的中心波长为８５０ｎｍ。     

LD汞浦Nd：YAG激光器的连续激光输出和高重复率调Q

用连续输出１Ｗ国产多量子阱激光二极管列阵（ＭＱＷ－ＬＤＡ）泵浦Ｎｄ：ＹＡＧ固体激光器，连续激光输出最大功率为１１２ｍＷ，光－光效率为１０．６％，斜效率为２０％，实现了连续泵浦高重复频率（１ｋＨｚ，４ｋＨｚ，１０ｋＨｚ）调Ｑ输出，最大峰值３５５Ｗ，最大平均功率为４３．７ｍＷ。     

激光二极管泵浦的全固体锁模激光器

报道了用国产激光二极管泵浦Ｎｄ：ＹＶＯ４激光器连续锁模的实验结果。在泵浦功率为１２２．４ｍＷ时获得稳定的锁模序列，脉冲宽度４３ｐｓ（ＦＷＨＭ），输出功率７ｍＷ，实验中在较低的泵浦强度下观察到了弛豫振荡的振幅调制现象，并导出了含有自相位调制时锁模宽度的自恰解。     

激光二极管泵浦的Nd：YVO4单频绿光激光器

对激光二极管泵浦单频连续运行的Ｎｄ：ＹＶＯ４腔内倍频激光器进行了理论和实验研究，通过精密调控Ｎｄ：ＹＶＯ４，ＫＴＰ及泵浦泵温度以达到有关参数的最佳匹配，从而获得了较稳定的单横模，单纵模，单偏振的绿光输出，实测最大单频录光功率为７．５ｍＷ，此时会聚磁浦光功率约为４３０ｍＷ，已超过阈值泵浦功率１３倍以上。     

激光二极管端面泵浦的调Q内腔倍频Nd：YAG激光器

报道了用两个１．５Ｗ激光二极管偏振耦合端面泵浦的声光调Ｑ内腔倍频Ｎｄ：ＹＡＧ激光器。输出５３２ｎｍ绿光重复频率１ＫＨｚ时，最大峰值功率为２．２３ＫＷ，最窄脉宽为１８ｎｓ，平均功率４０ｍＷ。最高重复频率３０ＫＨｚ。重复频率１５ｋＨＺ时，最高平均率１２８ｍＷ。对声光调Ｑ内倍频Ｎｄ：ＹＡＧ激光器的动态特性进行了理论分析及计算。     

激光二极管泵浦的Cr:LiSAF二次谐波产生获得可调谐蓝色激光连续输出

以６７９ｎｍ的激光二极管泵浦１ｍｍ厚掺杂摩尔分数为０．０２２Ｃｒ：ＬｉＳＡＦ,用α－切割的１类非临界位相匹配的ＫＮ晶体进行内腔倍频,在吸收功率在２５６ｍＷ时,得到了峰值３．１５ｍＷ,波长为４３１．７ｎｍ的ＴＥＭ００模蓝色激光输出,激光阈值为９６ｍＷ,斜效率为１．９７％,通过改变ＫＮ晶体的温度,实现了波长范围为４２３．４～４４５．５ｎｍ之间的连续可调谐蓝色激光输出。     

Effect of output coupling ratio on the performance of ring-cavity Brillouin fiber laser

We present a single-wavelength Brillouin fiber laser utilizing a ring-cavity configuration. Performances and characteristics of the laser system have been investigated at different output coupling ratios. The optimum output power of the system stood at 7.3 mW, which was obtained at 90% output coupling ratio. A low Brillouin threshold power of 0.9 mW was obtained at 10% output coupling ratio when the Brillouin pump was set at its maximum power of 24 mW.     

半导体激光泵浦Nd：YVO4激光器的1.34μm输出特性

报道了半导体激光泵浦Ｎｄ：ＹＶＯ４激光器在１．３４μｍ的输出特性，当入射的泵浦光功率为５１５ｍＷ时，最大１．３４μｍ激光输出功率达１５７ｍＷ，光－光转换效率为３０．５％，研究了激光器的纵模特性及弛豫噪声与泵浦功率的关系，发现不同的纵模具有各自不同的弛豫振荡频率。     

Picosecond Ti:sapphire-pumped optical parametric oscillator based on periodically poled LiNbO(3)

Periodically poled lithium niobate has been used in a singly resonant optical parametric oscillator pumped by a cw mode-locked Ti:sapphire laser. A tuning range of 1.15 to 2.4 microm was achieved when the pump was tuned, and this range was limited only by the mirror reflection bandwidth. Thresholds as low as 18 mW and an overall slope efficiency of 44% were observed, with average output powers of 130 mW (70 mW) for the signal (idler).     

Low-threshold, Self-frequency Doubling Laser Performance of Nd:YCOB at Different Phase-matching Directions

１　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｉｎｒｅｃｅｎｔｙｅａｒｓ,ｃｏｍｐａｃｔｖｉｓｉｂｌｅｌａｓｅｒｓｈａｖｅｂｅｅｎｗｉｄｅｌｙｕｓｅｄｉｎｔｈｅｆｉｅｌｄｓｏｆｉｎｄｕｓｔｒｙ,ｍｅｄｉｃｉｎｅ,ｍｉｌｉｔａｒｙ,ｂｉｏｌｏｇｙ,ｓｃｉｅｎｔｉｆｉｃｒｅｓｅａｒｃｈａｎｄｅｎｔｅｒｔａｉｎｍｅｎｔ．Ｌａｓｅｒｄｉｏｄｅｐｕｍｐｅｄ,ｉｎｔｒａｃａｖｉｔｙｆｒｅｑｕｅｎｃｙｄｏｕｂｌｅｄｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓａｒｅｅｘｔｅｎｓｉｖｅｌｙｕｓｅｄａｓｖｉｓｉｂｌｅｓｏｕｒｃｅｂｅｃ…     

Low-threshold, Self-frequency Doubling Laser Performance of Nd:YCOB at Different Phase-matching Directions

Self-frequency doubling laser performance of Ti∶sapphire laser pumped Nd∶YCOB at different phase-matching directions was investigated. Results show that the type I phase-matching direction of (64.5°, 35.5°) is much better than the direction of (33°, 9°). A maximum green light (530.5 nm) output power of 19.4 mW has been achieved with an pumping power of 530 mW, and an efficiency of 3.7 %. The laser oscilltion threshold for self-frequency doubling operation is measured to be less than 2 mW.     

Efficient grating-tuned mid-infrared Cr2+:CdSe laser

Room-temperature, all-solid-state, broadly tunable laser operation of Cr(2+) -doped CdSe has been demonstrated. Pumping with a Q -switched Tm, Ho:YLF laser running at a 1-kHz repetition rate achieved broadband output of 500 mW at 2.6mum with 48% absorbed power slope efficiency. With reduced efficiency, as much as 815 mW of power was obtained. With a diffraction grating, the Cr(2+): CdSe laser was tuned from 2.3 to 2.9mum with 10-nm bandwidth (FWHM) and output power up to 350 mW.     

Highly Efficient Frequency Doubling with a KNbO3 Semi-Monolithic Resonator

A semi-monolithic standing-wave resonator has been constructed and employed for frequency doubling of a Ti:sapphire laser. The resonator consists of a 5 mm long KNbO₃ crystal with dielectric coatings on both end faces and a spherical mirror with 20 mm radius of curvature. With 31.2 mW input power at 861.4 nm second harmonic power of 11.4 mW has been generated corresponding to the conversion efficiency of 36.5%.     

LiGdF4:Tm3+: spectroscopy and diode-pumped laser experiments

A novel LiGdF₄ crystal doped with Thulium ions has been grown using the Czochralski technique. Three samples with doping concentrations of 0.3 at.%, 8 at.%, and 12 at.% have been extensively spectroscopically analyzed. We also performed room-temperature preliminary laser experiments, pumping the samples with a laser diode at 792 nm obtaining 53% as maximum slope efficiency with a maximum output power of 205 mW and a minimum lasing threshold of 22 mW. The laser emission spectrum in free running condition typically spans between 1990 and 2018 nm.     

一种结构新颖的L波段掺铒光纤激光器

提出了一种结构新颖的L波段环形腔掺铒光纤激光器。用掺铒光纤作为增益介,采用980nm激光器作为前向抽运源,利用起偏器和偏振控制器获得L波段激光,利用光环形器将后向的放大自发辐射再引入铒光纤的前端,重复利用。当抽运功率为103mW时得到了阈值功率约为23．87mW,输出功率达6．34mW的激光输出,斜率效率约为8．05％,与没有重复利用后向放大自发辐射谱的掺铒光纤激光器做比较,该结构对L波段掺铒光纤激光器的性能有明显的提升作用。对于长度不合适的铒纤,在没有重复利用后向放大自发辐射谱时没有获得激光输出;而在利用后向放大自发辐射后,在阈值功率约为88mW时得到了激光输出,从而很好地证明了上述结论。