共查询到20条相似文献,搜索用时 31 毫秒
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第一台商品二极管泵浦固体(DPSS)激光器于1986年间世,近年来DPSS激光器技术取得门很大的进步. 早期DPSS激光系统的泵浦配置几乎都是端泵配置,起初采用Nd:YAG,最近也用Nd:YLF作激光介质.端泵系统容易获得单横模输出,但是几何的限制使它难以利用多个泵源,限制了总输出功率,cw输出功率一般不超过2W. 另一种泵浦配置是侧面泵浦,过去几年发展了多种侧泵技术.由于侧泵系统利用了二极管激光器列阵,因此功率较高,但它们的光学效率一般低于端泵系统,而且是多模输出.美国Spectra-Physics公司在1989年首先推出紧凑折叠式谐振腔(TFR)设计.在… 相似文献
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报道了用一个3W激光二极管端面泵浦Nd:YMA激光器。实验采用三镜折叠象散补偿腔。在1054mm波长,激光器CW输出功率达230mW,斜率效率为38%,光-光转换效率9.5%, 相似文献
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两个分立激光二极管阵列由一主激光器同时注入锁定。测定了其互相干函数的模,测定值为0.96±0.6,接近最大允许值1。两束注入锁定光输出的空间相位之差小于0.05波长(λ/20)。讨论注入锁定激光二极管阵列的相干组合条件。 相似文献
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本文介绍最近国外在研制半导体可见光激光器方面的一项重大进展,即人们首次用ZnSe材料在蓝绿光波段(490nm)实现了激射,这是目前用半导体激光器可以获得的最短的激光波长.由于在ZnSe外延膜的生长和激光器的制备过程中仍存在一些问题,激光器的特性尚不理想,仅在 77K下脉冲工作,但它终究已经开辟了通向制造实用器件的道路.本文概要介绍了制作这一激光器的困难、解决途径和现状. 相似文献
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We report a new way, i.e. double-end-pumping, to extend the stability range of a laser resonator, in advantage of making the thermal loading be effectively divided between the ends of the laser crystal to reduce the thermal effect, thus to extend the stability range. Using this new way, we experimentally obtained a 2.7-W cw laser source at 671 nm by intracavity frequency doubling of 1342nm ofa Nd:YVO4 laser based on the nonlinear crystal LIB3O5. The maximum pump power is 28 W, which is higher than 13 W of the single-end-pumping. 相似文献
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Green Output of 1.5 W from a Diode-Pumped Intracavity Frequency-Doubled Self-Q-Switched and Mode-Locked Cr,Nd:YAG Laser 下载免费PDF全文
We report a diode-pumped intracavity frequency-doubled self-Q-switched and mode-locked Cr,Nd:YAG/KTP green laser with a Z-type cavity, which produces 1.5 W of average power at 532nm with incident pump power 14.2 W. The individual mode-locked green pulse duration is about 560ps with 149 MHz repetition rate. Almost 100% modulation depth of the mode-locked green pulses is achieved at an incident pump power of 4.13 W. The maximum energy of Q-switched green pulse is 19.8μJ. The experimental results of pulse duration and pulse energy of Q-switched green pulse agree well with the theoretical calculations. 相似文献
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首次实现了LK泵浦Nd∶BGO固体激光器的1.064μm的激光输出,泵浦阈值功率为25mW,在连续运转状态下得到最大为40mW的TEM00模输出,光-光效率为13.3%,根据法拉第磁光效庆理论,了LD泵浦Nd∶BGO自调Q激光器的各种参数,并研制成该激光器,在该器件中,作为损耗调制元件的磁光调制器就是绕有线圈的Nd∶BGO晶体本身,实验在重复率为1KHz的条件下得到了FWHM为100ns的稳定脉冲 相似文献
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This paper demonstrates the passively mode-locked Nd:GdVO4 laser operating on the ^4F3/2-^4I9/2 transition at 912 nm by using a semiconductor saturable-absorber mirror for passive mode locking, stable continuous wave modelocked 912nm laser was achieved with a repetition rate of 176 MHz. At the incident pump power of 17.7W, 22.6mW average output power of stable mode-locked laser was obtained with a slope efficiency of 0.3%. 相似文献
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在半导体激光阵列侧面泵浦的Nd:YLF激光器中,利用声光调制器控制激光单向运转,消除空间烧孔效应,获得单纵模输出,通过预激光调Q获得脉宽为50ns,能量为1.2mJ的单纵模输出,理论分析的结果在实验上得到很好的验证。 相似文献
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二极管激光泵浦固体激光器和稳频研究 总被引:1,自引:0,他引:1
用调制法布里-珀罗干涉仪方法稳定二极管激光泵浦的NdYVO4单频激光器的频率。在锁定情形下,激光频从自由运行慢漂移1.43MHz/s和抖动±2.5MHz分别改善到75.75kHz/s和±1MHz 相似文献
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固体激光器向高平均功率发展存在的最大问题是沉积在激光介质里的废热。废热的消除将导致热透镜、机械应力和退偏等效应,并由此造成光束质量的退化,激光功率的降低,甚至可能造成介质的断裂。采用薄片激光器设计可以允许介质具有高的泵浦功率密度而不产生显著的温度梯度,当泵浦区尺寸远大于薄片厚度时,热流可认为是沿厚度方向的一维分布。合理设计泵浦耦合结构,可以使薄片径向温度分布近似均匀,从而大大降低介质的热透镜效应和热致应力双折射。因此薄片激光器可以定标放大到很高的平均功率。 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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提出了一种脱离国外模式的半导体激光耦合新方法,使用该方法既可以直接将半导体激光耦合成亮度均匀、光束参数积(BPP)值在两个方向相等的方形光斑,也可和光纤耦合得到一个圆形光斑,且只用球面镜和柱面镜两种光学元件,不需采用国外方法中用到的其它类型微光纤元件。将系统的出瞳作为光斑来解决亮度均匀分布问题;通过消除光源间隔对BPP值的影响来减小慢轴的BPP值;利用点光源的特点使快轴和慢轴的BPP值相等。采用该方法设计了各种要求和规格的半导体激光耦合光学系统,如本文设计实例中的参数为:巴条上的光源数为19个,巴条数为21个,故光源总数为399个。得到的方形光斑尺寸为0.6 mm×0.6 mm,NA值为0.22。此外,和直径为1 mm光纤耦合还得到了一圆形光斑。与国外方法比较,该方法结构简单,工艺要求低,更适用于高功率、低BPP值的半导体激光器。 相似文献
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The 946nm diode-pump microchip self-Q-switched laser of a chromium and neodymium codoped yttrium aluminum garnet crystal material (Cr^{4+}Nd^{3+}:YAG) is studied, especially about its physical mechanism of operation. The {}^4F_{3/2}→{}^4I_{9/2} transition of Nd^{3+} ion is beneficial to achieving laser oscillation in a quasi-three-level system based on coating the cavity mirrors of the microchip with films that suppress the 1064nm operation and enhance the 946nm laser. The Cr^{4+} ion is a saturable absorber. The initial loss N_{t1} is high, which acts as the threshold for laser oscillation. The stable loss N_{t2} is low because the Cr^{4+} ion is acceleratively bleached by the fast enhancement of the oscillating laser. The high N_{t1}, small N_{t2} and fast progresses permit the oscillating laser of the Cr^{4+}Nd^{3+}:YAG to have a good self-Q-switched property whose full width at half maximum is about 4.2ns. Its highest laser power is about 5.7mW. Its peak power is about 150W. Its good fundamental transverse TEM_{00} mode results from the absorption bleaching established by both the pump and oscillating lasers, which suppress other transverse mode and allow the oscillation only in the fundamental transverse TEM_{00} mode. 相似文献
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A simple method for boosting the beam quality of a commercial laser diode pumped laser (DPL) is put forward. By keeping one of the mirrors unchanged and the moving the other mirror a proper distance away from the laser rod, high beam quality laser output is realized. 相似文献
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