共查询到19条相似文献,搜索用时 78 毫秒
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分析了角锥棱镜对光束的相位变换作用,带二面角误差的角锥棱镜可等效于6块光楔的组合,其楔角的大小和方向由二面角误差决定。对在腔内往返传输的光线在镜面上的位置进行了分析,结果表明:3个二面角误差相同且不为零的角锥棱镜构成的谐振腔为约束非稳腔。用Fox-Li迭代法数值模拟得到了不同棱镜二面角误差情况下的谐振模式。模拟结果表明:圆形镜腔情况下基本振荡模式接近于TEM03模的拉盖尔高斯光束;当3个二面角误差不相同时,模式中各个区域的强度分布不对称。采用3个二面角误差基本接近且绝对值较小的棱镜可以提高光束质量。 相似文献
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分析了角锥棱镜对光束的相位变换作用,带二面角误差的角锥棱镜可等效于6块光楔的组合,其楔角的大小和方向由二面角误差决定。对在腔内往返传输的光线在镜面上的位置进行了分析,结果表明:3个二面角误差相同且不为零的角锥棱镜构成的谐振腔为约束非稳腔。用Fox-Li迭代法数值模拟得到了不同棱镜二面角误差情况下的谐振模式。模拟结果表明:圆形镜腔情况下基本振荡模式接近于TEM03模的拉盖尔高斯光束;当3个二面角误差不相同时,模式中各个区域的强度分布不对称。采用3个二面角误差基本接近且绝对值较小的棱镜可以提高光束质量。 相似文献
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在考虑耦合器插入损耗的情况下,理论分析了环中环结构谐振腔的耦合谐振透明效应.利用迭代法推导了整个结构的透过系数和有效相移,从而得到考虑了插入损耗的该结构的色散.研究表明,整个结构的有效相移,群速度和带宽,可通过耦合器的插入损耗、环中环结构中环与环周长之间的倍数以及环的个数来控制,这在旋转传感、光学时延线、光缓存、滤波等方面的应用有重要意义.
关键词:
环中环结构
耦合谐振透明
色散
慢光 相似文献
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惯性约束核聚变氟化氪激光驱动器与储存环自由电子激光器,虽然其激光产生机理完全不同,但是它们对于激光谐振腔光学膜系的要求却几乎完全相同.新研制的Al2O3/SiO2/MgF2“双氧化物+单氟化物”紫外光学膜系,在248nm中心波长处,它的光学透射率测量值为0.27%—0.71%,反射率的计算值为96.5%,其光谱带宽为22.6nm.在脉冲宽度为23ns的KrF激光照射下,它的抗激光损伤阈值达到(5.36±0.30)J/cm2,是可用于储存环紫外波长自由电子激光研究与数千焦耳数量级高能、高功率KrF激光驱动器研究的高破坏阈值紫外光学膜系. 相似文献
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利用对撞脉冲锁模非稳腔Nd:YAG激光器,采用KTP非线性晶体作腔外倍频,结合受激拉曼散射技术,在一台锁模激光器同时得到1.06μm,0.53μm,0.63μm超短光脉冲的输出。 相似文献
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自锁模钛宝石激光器谐振腔特性分析 总被引:1,自引:0,他引:1
研究了自锁模钛宝石激光器对谐振腔参数对于自锁模运转的影响,得到了腔的对称性,内腔曲率半径以及总腔长等参数对自锁模运转的影响关系,与实验相符。 相似文献
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Numerical study on multiple-pulse operation of passively modelocked stretched pulse fiber ring laser
We numerically study a stable multiple-pulse operation of passively modelocked stretched pulse fiber ring laser. The simulation results show that multiple pulses are formed with being triggered by radiation from a single pulse in a restricted parameter range. In order to obtain a better understanding of the effect of gain bandwidth and nonlinear gain on harmonic modelocking process of multiple-pulse operation, we analyze those effects in detail. 相似文献
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本文在理论上首次发现有源耦合腔激光器的自启动锁模和时域调制特性,并对其进行了全面的分析和计算.对有源耦合腔激光器的自启动锁模机制和时域调制特性给予详尽的数值计算结果和清晰的物理图象解释,提出在有源耦合腔锁模激光器中可用连续泵浦源代替锁模泵浦源,而且有产生更短的光脉冲可能性. 相似文献
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A multiwavelength actively mode-locked fiber ring laser that utilises a single semiconductor optical amplifier as both a gain and mode-locking element is presented. It is verified experimentally that the number of mode-locked wavelengths may be maximised by compensating for the anomalous intra-cavity dispersion. This is achieved through the inclusion of an appropriate length of normal dispersion fiber in the laser cavity. Using this technique, the number of wavelengths simultaneously mode-locked at 10 GHz was increased from 2 to 5. 相似文献
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Theoretical studies on beam parameters of a self-start ring cavity Ti:sapphire laser¥ZHANGGuizhong;ZHENGXuemei;WANGQingyue(De... 相似文献
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Lizhi Dong Wenjin Liu Ping Yang Bing Xu Xiang Lei Yu Ning Hu Yan 《Optics Communications》2011,284(7):2003-2006
Misalignment of a laser cavity would result in the displacement of beam location on the cavity mirrors. We present a simple method for automatic cavity alignment of a solid-state laser through detecting the location of the laser beam on the rear mirror, with which neither external alignment beams nor modifications to the cavity are required. The rear mirror of the laser cavity is replaced by a tip/tilt mirror to compensate for the misalignment. Experiments show that this method could effectively correct the misalignment of the laser cavity and restore the output power to almost the original value when the resonator is well aligned. 相似文献
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Theoretical analysis on phase-locking properties of a laser diode array facing an external cavity 总被引:2,自引:0,他引:2
Dan Lu Jianguo Chen Hua Yang Haibo Chen Xiaodong Lin Song Gao 《Optics & Laser Technology》2006,38(7):516-522
External coupling model has been used to describe the output field of a laser diode array (LDA) phase-locked with an external cavity. The analytical solution for the coupling matrix equation of the phase-locked system has been obtained. The dependencies of the threshold gain, gj of the system mode on the residue reflection of the front facet, rf and round trip external cavity lengths, L have been discussed. The working lengths of the external cavity for stably phase-locking the LDA of different residual reflectivities have been calculated. 相似文献
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