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P. A. Apanasevich S. A. Batishche A. S. Grabchikov A. A. Kuz’muk V. A. Lisinetskii V. A. Orlovich G. A. Tatur R. V. Chulkov 《Journal of Applied Spectroscopy》2006,73(3):371-376
We have studied stimulated Raman (SRS) conversion to the first Stokes component of multimode (M2 = 8) radiation from a YAG:Nd laser with lasing wavelengths of 1.319 μm, 1.338 μm, and 1.357 μm in a barium nitrate crystal.
We have obtained pulses of converted radiation with energies up to 120 mJ. We have achieved conversion efficiencies greater
than 40% for each of the three Raman laser wavelengths of 1.530 μm, 1.556 μm, and 1.582 μm with divergence of the beams of
converted radiation close to the diffraction-limited value (M2 < 1.5).
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 3, pp. 330–334, May–June, 2006. 相似文献
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High repetition rate pulsed laser of twin wavelengths from KTiOPO4 optical parametric oscillation 总被引:1,自引:0,他引:1 下载免费PDF全文
In this paper, some key techniques of KTiOPO_4 optical parametric oscillation (OPO) laser with repetitive frequencies and twin wavelengths output have been analysed theoretically and studied experimentally in detail. An intracavity optical parametric oscillator (IOPO) has been applied. Operating under 20Hz, laser output energy of more than 38mJ with twin wavelengths 1.57μm and 1.06μm has been achieved. Results of the experiments agree well with the theoretical discussion. 相似文献
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Experimental results on the generation of 1.54 μm eye-safe radiation in pure CH4, CH4:He and CH4:Ar mixtures pumped by the fundamental of an Nd:YAG laser, using the stimulated Raman scattering (SRS) technique, are described. A decrease in the energy conversion efficiency and degradation in the beam quality of S1 was observed in pure CH4 at high pump energies. This problem was overcome in CH4:He and CH4:Ar mixtures. Compared with the first Stokes (1.54 μm) energy conversion efficiency in pure CH4, at a pump energy of 126 mJ, an enhancement of 50% in energy conversion efficiency was observed in the CH4:Ar mixture (60% argon concentration) and as much as 100% in the CH4:He mixture (60% helium concentration). The use of these buffer gas mixtures improved the spatial beam quality of the Stokes radiation considerably and also resulted in raising the pump threshold for optical breakdown of the Raman gain medium. 相似文献
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依据美国ANSI标准,模拟计算了0~12 km的高度范围内不同的激光束发散角和不同激光脉冲能量比例的532和1 064 nm激光脉冲人眼安全最大阈值能量。给出两种532和1 064 nm激光脉冲人眼安全最大阈值能量分配方案:(1)激光束发散角为0.3 mrad且532与1 064 nm的激光脉冲最大阈值能量之比为1∶2;(2)激光束发散角为0.4 mrad且532与1 064 nm的激光脉冲最大阈值能量之比为1∶1。分析了用这两种激光脉冲人眼安全最大阈值能量分配方案探测模式大气时所对应的信噪比。分析结果表明:这两种方案既能保证机载激光雷达对模式大气探测时地面人眼安全又能达到探测所要求的信噪比。 相似文献
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Efficient continuous-wave eye-safe region signal output from intra-cavity singly resonant optical parametric oscillator 下载免费PDF全文
We report an efficient continuous-wave (CW) tunable intra-cavity singly resonant optical parametric oscillator based on the multi-period periodically poled lithium niobate and using a laser diode (LD) end-pumped CW 1064 nm Nd:YVO4 laser as the pump source. A highly efficiency CW operation is realized through a careful cavity design for mode matching and thermal stability. The signal tuning range is 1401-1500 nm obtained by varying the domain period. The maximum output power of 2.2 W at 1500 nm is obtained with a 17.1 W 808 nm LD power and the corresponding conversion efficiency is 12.9%. 相似文献
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Efficient continuous-wave eye-safe region signal output from intra-cavity singly resonant optical parametric oscillator 下载免费PDF全文
We report an efficient continuous-wave (CW) tunable intra-cavity singly resonant optical parametric oscillator based on the multi-period periodically poled lithium niobate and using a laser diode (LD) end-pumped CW 1064 nm Nd:YVO 4 laser as the pump source.A highly efficiency CW operation is realized through a careful cavity design for mode matching and thermal stability.The signal tuning range is 1401-1500 nm obtained by varying the domain period.The maximum output power of 2.2 W at 1500 nm is obtained with a 17.1 W 808 nm LD power and the corresponding conversion efficiency is 12.9%. 相似文献
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Experimental results on the generation of 1.54 μm eye-safe radiation in pure CH4, CH4:He and CH4:Ar mixtures pumped by the fundamental of an Nd:YAG laser, using the stimulated Raman scattering (SRS) technique, are described. A decrease in the energy conversion efficiency and degradation in the beam quality of S1 was observed in pure CH4 at high pump energies. This problem was overcome in CH4:He and CH4:Ar mixtures. Compared with the first Stokes (1.54 μm) energy conversion efficiency in pure CH4, at a pump energy of 126 mJ, an enhancement of 50% in energy conversion efficiency was observed in the CH4:Ar mixture (60% argon concentration) and as much as 100% in the CH4:He mixture (60% helium concentration). The use of these buffer gas mixtures improved the spatial beam quality of the Stokes radiation considerably and also resulted in raising the pump threshold for optical breakdown of the Raman gain medium. 相似文献