共查询到19条相似文献,搜索用时 89 毫秒
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双波长双脉冲激光三次谐波的产生方法 总被引:1,自引:0,他引:1
提出双波长双脉冲激光产生三次谐波的方法。波长不同的两脉冲激光束由反射使它们合拢后通过两块非线性的BBO晶体 ,激光脉冲第一次通过BBO晶体产生两波长的二次谐波 (SHG) ,它们由各自的反射镜反射再次通过BBO又产生了二次谐波 ,这两次产生的二次谐波和基波通过用于产生三次谐波的BBO晶体可产生双波长的三次谐波 ,它们由 45°斜置的耦合镜输出。文中分析了满足二次谐波和三次谐波的四个相位匹配的条件 ,该方法也可用于腔内双波长双脉冲的三次谐波激光的产生 ,给出了相应的实验结果。 相似文献
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“用双棱镜测量光波波长”实验的剖析 总被引:4,自引:1,他引:3
“用双棱镜测量光波波长”实验的剖析王潜智,杨之昌(上海复旦大学物理系200433)用“双棱镜测量光波波长”是一个较为基本的基础实验[1].本文根据我们的教学经验,对实验的设计、实验的技巧,进行了分析和讨论,以及对如何进行启发式教学等方面发表一些粗浅的... 相似文献
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双棱镜干涉实验中距离参数的分析 总被引:1,自引:0,他引:1
分析了双棱镜干涉实验中各光学元件间距离参数的联系及对波长测量误差的影响,在此基础上,对如何适当选择距离参数以提高实验效率提出建议. 相似文献
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本文提出了一种新的静电双棱镜——二次电位分布静电双棱镜,用此棱镜可增强干涉电子的强度,并扩大等间距干涉条纹的区域. 相似文献
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在大功率激光系统的评价与分析中,激光器的光束品质是系统光束品质的决定性因素,也是激光器验收、鉴定的重要指标,其中束散角是判别激光光束质量的重要参数。本系统测试激光波长的范围比较宽,一般在0.532μm~10.6μm之间,没有合适的探测器能够覆盖整个波段,所以采用了一种新的方法来解决宽波段束散角的测量问题。选用CCD成像和扫描狭缝相结合的方法来实现宽波段激光光束束散角的测量,可见光和近红外波段(0.532μm~1.2μm)激光光束采用CCD法测量激光束散角,中红外波段(1.2μm~10.6μm)激光光束采用扫描狭缝法测量激光束散角。两种方法的结合可以较为精确地测量出不同波段的激光束散角。 相似文献
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As the SG-DBR laser is among the most attractive sources for WDM and DWDM systems, it is important and necessary to investigate its wavelength switching characteristics. This behaviour will affect wavelength routing and the capability limits for channel re-allocation in future optical networks. This paper presents detailed experimental studies on a high-speed SG-DBR laser by using a Fabry–Perot Interferometer technique adapted for the non-continuous wave case. Measurements of fast intra-modal (i.e. cavity mode) and inter-modal (i.e. super-mode) wavelength switching and insights into the device's dynamic behaviour are obtained. Implications are given for transmitter design in dynamic wavelength routing and channel re-allocation. 相似文献
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In this paper, a novel configuration of a wavelength converter is set forth by utilizing a semiconductor optical amplifier (SOA) as a nonlinear gain medium to generate a four-wave mixing (FWM) effect by using a dual wavelength bi-erbium-doped fiber laser that uses an Arrayed Waveguide Grating (AWG) together with two optical channel selector (OSC) as selective elements to function as a dual wavelength switchable pump power. The four-wave mixing (FWM) is produced with a wavelength detuning of 7 nm from the pump and signal which used is as the converted signal at wavelength 1532.8 nm or 1534.5 nm for transferring data from the input signal at wavelength 1547.0 nm. Thus, even though the conversion efficiency is as low as −43 dB, it is still possible for applications as a wavelength converter. 相似文献
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反射式体布拉格光栅(VBG)是改善半导体激光器(DL)输出光谱特性的首选器件。对快轴准直透镜(FAC)的非球面方程进行了数值拟合,采用光线追迹的方法建立了DL波长稳定系统反馈效率的计算模型,分析了FAC透镜、反射式VBG的空间位置和旋转角度变化对DL波长稳定系统反馈效率的影响,给出了波长稳定系统中FAC和反射式VBG的装调容差范围。分析结果表明:反射式VBG的空间位置偏差对反馈效率影响不大,但FAC透镜的空间位置和旋转角度偏差、反射式VBG的旋转角度偏差会造成反馈效率的急剧下降。 相似文献
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Sampled grating DBR (SGDBR) based laser arrays were demonstrated to be feasible for realizing monolithically integrated DWDM sources. In order to ease the post-fabrication wavelength control for SGDBR laser arrays, the influence of the sampling duty cycle and the difference of reflection peak spacing is analyzed and investigated experimentally for achieving the best side-mode suppression ratio (SMSR) of a SGDBR laser array. It is found that such type of laser arrays can have good tolerance on the mirror misalignment. We demonstrated arrays with uniform wavelength combs of 32 wavelengths in 0.8 nm wavelength spacing. Both high SMSR and accurate wavelength registration are achieved for all lasers in an array. We also demonstrated 16-wavelength laser arrays of 50 GHz spacing whose wavelengths are aligned to the ITU grid with single-electrode operation. 相似文献
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通过倍频Nd:YAG固体激光的基波得到波长分别为532、355和266 nm的激光,研究了单晶硅(Si)对不同波长固体激光的吸收规律和3种不同波长激光在真空条件下烧蚀单晶Si的烧蚀特征。结果表明,单晶Si对波长为100~370 nm的紫外激光具有很好的吸收效果;在其他条件相同时,532 nm波长激光烧蚀单晶Si所需最低单脉冲能量(Ep=30 μJ)是355和266 nm波长激光烧蚀单晶Si所需最低单脉冲能量(Ep=15 μJ)的2倍;532、355和266 nm的激光烧蚀单晶Si的烧蚀阈值随着波长的变短而变小。 相似文献