532 nm Nd:YAG激光的高效多波长受激喇曼转化
Efficient multi-wavelength Raman conversion of Nd:YAG laser at 532 nm
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摘要: Nd:YAG二倍频激光(532 nm)泵浦H2中的受激喇曼散射产生多级斯托克斯。其中一级、二级和三级斯托克斯的最高量子转换效率分别可达66%，60%和19%。在0.44 MPa下，可同时获得1 579 nm(19%)，954 nm(30%)，683 nm(33%)，532 nm(14%)，436 nm(3.7%)和368 nm(1.4%)的多波长输出。H2压力对多级斯托克斯转换有显著影响：高气压有利于产生高效的一级斯托克斯，而低气压则适合于高级斯托克斯和反斯托克斯的产生。Abstract: Multi-order Stokes is generated in H2 pumped by a pulsed Nd:YAG laser at 532 nm. Maximum energy conversion efficiencies as high as 66%， 60% and 19% are attained for the first，second and third Stokes respectively. Under 0.44 MPa H2, significant multi-wavelength outputs can be obtained simultaneously with quantum distribution of 19% at 1 579 nm, 30% at 954 nm, 33% at 683 nm, 14% at 532 nm, 3.7% at 436 nm, and 1.4% at 368 nm. High-pressure H2 is found to be the best for highly efficient first Stokes conversion, while low-pressure H2 is proved suitable for higher order Stokes and anti-Stokes generation.
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Key words:
- nd:yag laser /
- stimulated raman scattering /
- four-wave mixing /
- h2 gas
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