共查询到20条相似文献,搜索用时 78 毫秒
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激光二极管侧面泵浦容易将大功率二极管阵列(LDA)光耦合到激光晶体中去,但耦合效率有待于进一步的提高.在已建立的二极管单bar侧面泵浦YAG晶体泵浦光场分布数值模型的基础上,进一步分析了三向侧面泵浦激光器晶体内光强的分布,并全面考虑了耦合系统相关的因素,结合实际设计出LD三向侧面泵浦耦合光学系统,最终获得了重复频率1~1 000 Hz可调,波长1.064 μm的TEMoo模的调Q窄脉冲激光输出.激光输出最大单脉冲能量为11.5 mJ,脉冲宽度为8 ns,光-光转换效率为11.7%.实验验证了该耦合系统的合理性与优越性,为高效耦合系统的进一步优化奠定了基础. 相似文献
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《光机电信息》2004,(1):53-54
二极管激光器系统德国Uniqum .o .d .e .e股份公司生产的UM 780 0 / 1 0 0 / 2 0系列高能二极管激光器系统的功率为 7 8W ,波长为 80 8m。这种二极管激光器适用泵浦钕固体激光器、纳米材料加工、塑料焊接以及医用激光治疗仪。采用已获得专利权的微光学技术可以使激光二极管发射的非对称光束变成对称光束。该激光系统可制成小型密封包装结构。其特点是系统内置热电制冷器 ,采用SMA90 5连接器 ,工作温度为 2 5℃。 (No.2 6)二极管激光器德国Limo有限责任公司生产的HLU1 0 0F40 0 80 8光纤耦合二极管激光器采用40 0 μm光纤传光 ,功率为… 相似文献
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纵向二极管泵浦固体激光器在光雷达和光通信方面的应用1、引言在二极管泵浦固体激光器的多种用途中,通信技术占有特别的份额。激光二极管首先具有与玻璃纤维耦合的技术。而固体激光器由于其较好的射束质量主要用于以自由空间作传输媒介的系统。下面介绍两种在不远的将来... 相似文献
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以脉冲无极放电作激光泵浦源,可提供高峰值功率、高紫外分量、高光学耦合效率、长使用寿命,并有良好的再现性。这一特点可望用于高功率碘原子激光器。本文提出一个以此种方式泵浦的兆兆瓦级、直径20厘米的激光放大器方案,论述了此种泵浦系统的特点。 相似文献
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A novel scheme is presented that can be used to efficiently pump optical waveguide amplifiers. It is based on the coupling between two adjacent waveguides, where pump light is gradually coupled from a nonabsorbing pump waveguide into the amplifier waveguide. The coupling between the waveguides in such a configuration is calculated using an improved coupled mode theory (CMT). The proposed distributed coupling scheme can enhance the optical gain in systems that exhibit a reduced pumping efficiency at high pump power. A numerical example is given for a sensitized neodymium-doped polymer waveguide amplifier, in which the optical gain increases from 0.005 dB to 1.6 dB by changing from conventional butt-coupling to distributed coupling 相似文献
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Delong Zhang Caihe Chen Guilan Ding Junli Zhang Yuming Cui 《Quantum Electronics, IEEE Journal of》1997,33(7):1231-1235
The mode size, effective pump area, and coupling efficiency as function of initial Ti-stripe width W, diffusion temperature T, and initial Ti-stripe thickness H in c-cut Ti-diffused Er:LiNbO3 waveguide laser have been studied theoretically, taking into account optical pumping λp=1.477 μm and 0.98 μm. The main features of the mode sizes in terms of these diffusion parameters were collected and, as compared with the experimental results, a qualitative agreement has been achieved. The effective pump areas exhibit both significant initial Ti-stripe width and diffusion temperature dependence, especially for W>9 μm and T>1050°C, whereas the initial Ti-stripe thickness can hardly give influence when pumping with λp=0.98 μm radiation. On the other hand, coupling efficiency is approximately unchanged with values 0.76-0.78 for λp=1.477 μm and 0.8-0.85 for λ p=0.98 μm, indicating that there are no optimized values of these parameters to increase slope efficiency through coupling efficiency. Moreover, the 0.98 μm pumping reveal lower threshold and higher coupling efficiency than 1.477-μm pumping. Finally, the appropriate waveguide fabrication parameters were proposed for the fabrication of a more efficient laser 相似文献
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M. Wada K. Yoshino M. Yamada J. Temmyo 《Photonics Technology Letters, IEEE》1991,3(11):953-955
An investigation of epitaxial-layer structures has yielded narrow ridge waveguide structure lasers capable of coupling high optical power into single-mode fiber (SMF). An optical power of well over 60 mW in SMF was obtained for a 2- mu m-wide ridge waveguide laser with a guided separate-confinement-heterostructure (SCH) epitaxial structure. Calculated results indicate that the stringent limit imposed on 0.98- mu m wavelength detuning is relaxed for such high optical power coupled into a SMF. The 0.98- mu m strained-quantum-well lasers thus show considerable promise as a practical low-noise pumping source for Er-doped optical-fiber amplifiers.<> 相似文献
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A maximum output power of 115 mW and a slope efficiency of 0.92 W/A have been achieved in 0.98-μm InGaAs strained quantum well lasers with a 3-μm-wide ridge waveguide structure for efficient fiber coupling. Stable operation of over 5000 h under 50°C constant power operation with an optical power density of 3.9 MW/cm2 has been demonstrated with a degradation rate as low as 5×10-6 per hour. These results show that this device is promising as a practical pumping source for Er3+-doped fiber optical amplifiers 相似文献
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为了提高高功率光纤激光器中大模场双包层光纤的熔接质量,采用NUFERN 20/400μm双包层光纤搭建了光功率对准系统,对大模场双包层光纤中存在包层光以及纤芯中只有基模和存在高阶模时光纤径向偏移与耦合效率的关系进行了理论分析和实验验证。结果表明,大模场双包层光纤中包层光和纤芯中高阶模的存在使耦合效率对径向偏移变化的敏感度降低,滤除包层光和高阶模后耦合效率随光纤径向偏移量呈高斯型变化; 使用光功率对准系统搭建千瓦级双端抽运激光系统,最大输出功率约1170W,光光转换效率约73%,光束质量约1.22,实现了千瓦级准单模输出。光功率对准技术能够实现待熔光纤的精确对准,对高功率光纤激光器输出性能的提升有重要意义。 相似文献
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利用880 nm半导体激光器同带泵浦声光调Q Nd:YVO4自拉曼激光器,以减轻热效应对泵浦功率的限制和对拉曼增益的影响,获得高效的1 176 nm一阶斯托克斯光输出。使用两块长度10 mm的Nd:YVO4晶体作为增益介质,脉冲重复频率190 kHz时,在26.8 W入射泵浦功率下获得6.11 W的平均输出功率,光光转换效率22.8%。实验研究了拉曼增益介质长度对输出功率和转换效率的影响,并对自拉曼激光器输出功率曲线中出现凹陷的原因进行分析,认为凹陷并非源自谐振腔稳定性,而是由于增益较弱的斯托克斯光对于谐振腔失调的敏感性所致。对照试验结果显示,与808 nm传统泵浦方式相比,880 nm同带泵浦下自拉曼激光器的输出功率和转换效率得到明显提高。 相似文献