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    Tunable 16-micron coherent source including parahydrogen Raman transition and method
    1.
    发明授权
    Tunable 16-micron coherent source including parahydrogen Raman transition and method 失效
    可调谐的16微米相干源，包括旁氢化拉曼跃迁和方法

    公开(公告)号：US4278902A

    公开(公告)日：1981-07-14

    申请号：US974588

    申请日：1978-12-29

    申请人： Michael M. Loy ,  Peter P. Sorokin

    发明人： Michael M. Loy ,  Peter P. Sorokin

    IPC分类号： G01J3/10 ,  G02F1/35 ,  G02F1/39 ,  H01S3/03 ,  H01S3/09 ,  H01S3/14 ,  H01S3/30 ,  H03F7/00

    CPC分类号： G02F1/39 ,  G02F1/3534 ,  H01S3/305

    摘要： A coherent tunable narrow band IR source in the vicinity of 16 .mu.m is achieved by four-wave parametric mixing in parahydrogen. A pair of colinear laser beams, one from a narrow band CO.sub.2 laser, and a second from a multiline laser with output of wave number significantly below 14,400 cm..sup.-1, is focused in a parahydrogen containing cell. The multi-line laser beam drives a Raman process in the cell. The narrow band CO.sub.2 input beam mixes with this driver beam and the Stokes wave resulting from the Raman process to produce a 16 .mu.m output beam. Tuning of the CO.sub.2 laser allows tuning of the 16 .mu.m radiation emitted by the parahydrogen cell.

    摘要翻译： 16 m左右的相干可调窄带红外光源是通过在二氢氢过程中进行四波参数混合实现的。 来自窄带CO2激光器的一对共线激光束，以及波数显着低于14,400cm -1的多线激光器的第二激光束聚焦在含有含氢的电池中。 多行激光束驱动电池中的拉曼过程。 窄带CO2输入光束与该驱动光束混合，并且由拉曼光谱产生的斯托克斯波产生16μm输出光束。 二氧化碳激光器的调谐允许调节由旁二极细胞发射的16微米辐射。

    Time-resolved infrared spectral photography
    2.
    发明授权
    Time-resolved infrared spectral photography 失效
    时间分辨红外光谱摄影

    公开(公告)号：US4243881A

    公开(公告)日：1981-01-06

    申请号：US84245

    申请日：1979-10-12

    申请人： Donald S. Bethune ,  John R. Lankard ,  Michael M. Loy ,  Peter P. Sorokin

    发明人： Donald S. Bethune ,  John R. Lankard ,  Michael M. Loy ,  Peter P. Sorokin

    IPC分类号： G01J3/44 ,  H01S3/30 ,  G01J1/00

    CPC分类号： G01J3/44 ,  H01S3/305

    摘要： An intense broadband continuum light pulse of uniform spectral intensity and short time duration is generated. This continuum pulse is then downconverted in frequency to a region of interest, preferably in the infrared region, by applying it as a pump pulse to a molecular or atomic vapor so as to induce stimulated Raman scattering. The resulting Raman Stokes pulse surprisingly tends to have the same spectral bandwidth, intensity uniformity and time duration as the pump continuum pulse.The downconverted continuum pulse (the Raman Stokes pulse) is then used to probe a sample. The sample converts the uniform spectral intensity distribution of the probe pulse into a nonuniform spectral intensity distribution which contains the absorption spectrum of the sample. This spectrum pulse has the same spectral bandwidth and time duration as the Raman Stokes pulse and is finally upconverted in frequency to a region where the spectrum pulse can be conveniently recorded. This is done with a four-wave Raman mixing process in an alkali metal vapor. The vapor is simultaneously pumped with the spectrum pulse and with a second pumping light pulse (or beam) having a frequency in the vicinity of a suitable resonance line of the vapor so as to induce SERS. In the alkali metal vapor, the resulting Raman Stokes pulse and spectrum pulse beat together with the second pumping light pulse to produce an upconverted pulse at a higher frequency band, which surprisingly also tends to have the same spectral bandwidth, intensity distribution (spectrum) and time duration as the spectrum pulse. The upconverted pulse is then recorded either photographically or photoelectrically with conventional spectrographic apparatus.

    摘要翻译： 产生具有均匀光谱强度和短持续时间的强烈的宽带连续光脉冲。 然后将该连续脉冲通过将其作为泵浦脉冲施加到分子或原子蒸气以便引起受激拉曼散射，从而频率下降到感兴趣区域，优选在红外区域。 所产生的拉曼斯托克斯脉冲令人惊奇地倾向于具有与泵连续脉冲相同的光谱带宽，强度均匀性和持续时间。 然后将下变频的连续脉冲（拉曼斯托克斯脉冲）用于探测样品。 样本将探针脉冲的均匀光谱强度分布转换成包含样品的吸收光谱的不均匀光谱强度分布。 该光谱脉冲具有与拉曼斯托克斯脉冲相同的光谱带宽和持续时间，并且最终以频率上变频到可以方便记录频谱脉冲的区域。 这是通过碱金属蒸气中的四波拉曼混合过程完成的。 蒸气同时用光谱脉冲泵浦并且具有在蒸汽的合适共振线附近具有频率的第二泵浦光脉冲（或光束），以引起SERS。 在碱金属蒸气中，所得到的拉曼斯托克斯脉冲和频谱脉冲与第二泵浦光脉冲一起拍击，以产生在较高频带上的上变频脉冲，令人惊奇地也趋向于具有相同的光谱带宽，强度分布（光谱）和 持续时间作为频谱脉冲。 然后用传统的光谱仪记录上变频脉冲的照相或光电。