共查询到19条相似文献,搜索用时 93 毫秒
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采用放大1064 nm掺镱光纤激光器作为泵浦源,实现了中红外3.8μm MgO:PPLN光参量振荡(OPO)激光输出。在泵浦源中,采用分布式反馈激光器(DFB)作为种子源来实现光纤激光窄线宽的调制,实现线宽2.5 nm到0.1 nm的压缩,最大平均输出功率可达40 W。进一步对不同泵浦线宽条件下中红外3.8μm MgO:PPLN OPO激光进行研究,最终在泵浦功率为18.1 W、线宽为0.1 nm、重频为1 MHz、脉宽为2 ns时,获得了最高平均输出功率为2.06 W的3822.5 nm激光输出,光-光转换效率为11.38%,光束质量为M2=2.34,提高了窄线宽泵浦对中红外MgO:PPLN OPO激光输出效率。 相似文献
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自放大结构分布反馈光纤激光器输出特性 总被引:1,自引:1,他引:0
在光敏性掺铒光纤上制作了45mm长非对称相移结构光纤光栅,构成前后向功率输出比大于100∶1的分布反馈光纤激光器.利用一定长度的掺铒光纤吸收有源相移光栅后的剩余泵浦光,实现了对前向输出激光信号的放大,并采用OptiSystem软件模拟了掺铒光纤长度与增益的关系.为了保持输出激光的窄线宽和低噪音特性,利用布喇格波长与激光相同的光纤光栅和光纤环行器构成光窄带滤波器,对放大后激光信号的ASE噪音进行滤除.研究表明:所设计的激光器结构充分利用了泵浦光,在300mW的(980nm)泵浦功率下获得了功率为32.5mW,线宽为11.5kHz,相对强度噪音为-87dB/Hz的激光输出. 相似文献
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宽条形半导体激光器广泛应用于激光泵浦、激光加工等领域。针对宽条型半导体激光器输出光谱宽、调谐范围小的问题,采用衍射效率分别为28%和55%的反射式衍射光栅作为反馈元件构建了宽条形970 nm波长光栅外腔半导体激光器。研究了Littrow结构激光器参数对其性能(调谐范围、功率、阈值电流、线宽)的影响。实验结果表明,通过结构优化可得到窄线宽可调谐激光输出,适当地提高温度和使用较高衍射效率的光栅可增加激光器调谐范围,并且较高衍射效率的光栅可降低激光器的阈值电流。基于S偏振入射方式的光栅外腔激光器最大可实现27.87 nm的波长调谐范围,光谱线宽压窄至0.2 nm,输出功率可达1.11 W。 相似文献
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窄谱光纤激光器在光束合成等领域有着广泛的应用,然而模式不稳定效应的出现严重限制着窄谱光纤激光器的功率提升。提出并验证了采用新型981 nm稳波长泵浦方案,能够应用于窄谱激光放大并提升模式不稳定效应阈值,通过采用单端后向泵浦结构,将单模窄谱光纤放大器功率提至4 kW以上。实验中采用白噪声相位调制展宽单频激光作为窄谱种子,主放大级分别采用稳波长976 nm和981 nm两种泵浦源单端后向泵浦。在采用976 nm泵浦源泵浦时,窄谱激光最高放大至3.4 kW,出现典型的模式不稳定效应特征,功率提升受到限制。在采用981 nm泵浦源泵浦时,窄谱激光最高放大至4.05 kW,且并未出现模式不稳定效应,输出光束质量M2因子为1.3,进一步功率提升仅受限于泵浦功率。通过优化激光器设计、结合双向泵浦结构,有望实现更高功率的窄谱光纤激光输出。 相似文献
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高功率窄线宽光纤激光器在相干探测、功率光谱合成等方面具有广泛的应用前景.分析了高功率窄线宽光纤激光器中受激布里渊散射效应的抑制方法,以及正弦相位调制光谱展宽理论.采用正弦相位调制技术将单频激光器的线宽展宽至2.9 GHz,通过三级放大结构对输出功率为50 mW的窄线宽种子源进行放大,实现了中心波长1064.34 nm、线宽2.9 GHz、最大功率780 W的激光输出,光—光转换效率79%,光束质量M2x=1.44,M2y=1.43.分析了相位调制前后输出功率提高的原因,认为正弦相位调制增加的纵模降低了光纤中的功率谱密度,提高了输出激光的受激布里渊散射阈值,促使相位调制后的输出功率大幅提高.该激光器的输出功率仅受限于抽运功率,进一步提高抽运功率,有望实现更高功率的窄线宽光纤激光输出. 相似文献
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白云昌孙峰刘在洲郑建奎李海速 《光学与光电技术》2016,(4):44-47
介绍了由Ho∶YAG声光调Q激光器输出2.1μm激光脉冲泵浦ZGP光参量振荡器。利用1.9μm激光器作为Ho∶YAG激光器的泵浦源,调Q重复频率为15kHz时,激光器输出功率21.5 W单一波长窄线宽激光。由Ho∶YAG激光器泵浦ZGP-OPO,最大输出中波红外激光8.85 W,激光脉冲宽度14.5ns,激光器输出斜效率高达80.9%。该激光器在气体检测及光电对抗等领域有广泛的应用前景。 相似文献
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We report experimental results on a 96.2 W all-fiberized nanosecond single-frequency masteroscillator power amplifier (MOPA)
laser working at 1064 nm. An external modulation fiber laser with average power of 0.5 mW and line width of 20 kHz is used
as the seed source. Amplifying the seed laser in four stages, a single-frequency laser with pulse duration of 10 ns and peak
power of 816.7 W is obtained. The average output power is up to 96.2 W. Further power-scaling of this MOPA structure can be
realized since our experiment is only pump-power limited. 相似文献
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搭建了一台主振荡功率放大(MOPA)结构的单频脉冲全光纤激光器。通过对线宽为 20 kHz 的连续单频激光器进行强度调制,获得了重复频率 10 MHz、脉宽约 8 ns、平均功率约 0.5 mW 的单频脉冲种子激光。采用多级掺镱光纤放大器对脉冲种子激光进行级联放大,获得了平均功率 300.8 W 的高功率激光输出。目前,激光器输出功率仅受限于泵浦功率,有望通过增加泵浦功率进一步提高输出功率。 相似文献
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We report a high-repetition-rate, high-pulse-energy master oscillator power amplifier (MOPA) laser system, in which the seed
laser from the Nd:YAG rod-based oscillator cavity dumped at 500 kHz, was scaled up consecutively by a four-stage Nd:YVO4 preamplifier and a two-stage Nd:YAG zigzag slab main amplifier. The laser pulsed output with the average power of 510 W was
achieved, with the efficiency extraction of 26.6% at the main amplifier stage and the single-pulse energy of 1.02 mJ. 相似文献
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报道了一台全光纤结构主振荡功率放大(MOPA)型掺镱脉冲光纤激光器,以光纤光栅为腔镜,光纤型声光调Q的光纤激光器为种子源,通过两级掺镱双包层光纤放大器实现功率放大。对声光调Q的光纤激光器输出特性进行了研究,比较了不同泵浦波长、不同重复频率对激光输出功率和脉冲宽度的影响,并实现了最短脉冲宽度25 ns、单脉冲能量45 μJ的脉冲激光输出。在重复频率50 kHz时,对脉冲宽度130 ns、平均功率0.6 W的种子光进行放大,得到了平均功率102.5 W、脉冲宽度约240 ns的激光输出。 相似文献
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We presented a Nd:YAG master oscillator power amplifier (MOPA) with the compact LD double-end pumped configuration. To acquire
the homogenous absorption distribution, a composite short Nd:YAG rod has been employed as the amplification medium and the
rod side was well polished to cause total internal reflection (TIR) at the internal wall of the rod. Because the axes of pump
LDs and the seed laser occupy the same position, it is relatively easy to obtain both the satisfied mode-matching efficiency
and the high absorption efficiency by using two stacked-LD modules. A seed laser, with the input energy of 15 mJ and the pulse
width of 46 ns, was amplified through the MOPA structure with the one-pass gain of about 1.2. We have not found any parasitic
oscillations from both ends of the amplifier rod until the total pump LD power reached 420 W. The proposed scheme is thought
to be useful in a multiple-pass MOPA system for high-average-power applications. 相似文献
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主振荡功率放大(main oscillation power amplification, MOPA)结构由于其光束质量良好和参数可调的优点,已成为高功率光纤激光器的主流设计之一。为了改善高功率掺镱光纤激光器(ytterbium-doped fiber laser, YDFL)的输出性能,提高系统的光-光转换效率,文中报道了一台基于915 nm泵浦激光器和双包层掺镱光纤(ytterbium-doped fiber, YDF)的MOPA结构全光纤高功率激光器。该高功率光纤激光器由电调制激光二极管(laser diode, LD)泵浦的种子激光器和掺镱光纤放大器(ytterbium-doped fiber amplifier, YDFA)组成。连续光(continuous wave, CW)工作模式下,激光种子源经过YDFA后,实现了中心波长为1 069.96 nm的激光输出,最大平均输出功率可达945.9 W,MOPA激光器整机的斜率效率高达74.12%,具有良好的稳健性。该研究方案对研制高功率MOPA光纤激光器具有参考意义。 相似文献
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A high-power all-fiber single-frequency polarization-maintained(PM)laser operating at 1 083 nm is demonstrated using a master oscillator power amplifier(MOPA)structure.The seed source of this MOPA laser system is an in-house-built ring-cavity fiber oscillator.Four-stage amplification configuration is employed, in which the maximal output power of the main amplifier is 90.4 W,corresponding to a conversion efficiency of 72.5%.The polarization extinction ratio of the output light is 13 dB.The amplified spontaneous emission is suppressed by a factor of over 25 dB,and no stimulated Brillouin scattering effect is observed when a large-mode-area and high absorption coefficient PM gain fiber is employed. 相似文献
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《中国物理快报》2016,(12)
An efficient narrow-linewidth single-frequency(SF) Yb-doped all-fiber master oscillator power amplifier(MOPA)laser operating at 1064.3 nm is demonstrated experimentally.A ring cavity SF fiber laser is used as the seed source for the MOPA system and the Yb-doped fibers are employed as the gain medium or the saturable absorber.The SF operation is observed to be stable without mode hopping.The highest output power of 266 mW is obtained under the 400 mW pump power with the corresponding slope efficiency of 66.2%.The linewidth of the amplified output laser is approximately 1 kHz and its optical signal-to-noise ratio is over 45 dB. 相似文献