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  • 1
    Electronic Resource
    Electronic Resource
    Generation of more than 40 laser emission lines from the ultraviolet to the visible regions by two-color stimulated raman effect (1989)
    Springer
    Applied physics 49 (1989), S. 389-392 
    Details
    ISSN: 1432-0649
    Keywords: 42.65 ; 51.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An intense and monochromatic laser beam consisting of more than 40 vibrational and rotational lines is generated by the stimulated Raman effect, when two-color laser beams separated by ∼590 cm−1 are tightly focused into pressurized hydrogen. This phenomenon is reasonably explained by four-wave mixing; one beam is used for two-step excitation (ω1+ω1) to an imaginary level and another beam (ω2) acts as a seed beam, generating a fourth beam (2ω1−ω2). Through cascade processes, so many laser emissions appear with a frequency difference of (ω1−ω2) in entire ultraviolet and visible regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324191
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Efficiently generated rotational and vibrational stimulated raman emission by means of a two-color laser beam (1991)
    Springer
    Applied physics 52 (1991), S. 211-216 
    Details
    ISSN: 1432-0649
    Keywords: 42.65 ; 51.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract When a two-color laser beam is introduced into pressurized hydrogen, about 40 laser emission lines are generated from the ultraviolet to the visible regions. This phenomenon is ascribed to the stimulated Raman effect due to a combination ofJ=1 →J=3 rotational andv=0 →v=1 vibrational transitions. By introducing the two-color laser beam, the threshold for generation of the rotational line is substantially reduced. The present phenomenon is attributed to four-wave mixing, which allows efficient generation of higher-order rotational and vibrational Raman lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00750953
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Generation of high-order rotational lines by four-wave Raman mixing using a high-power picosecond Ti:Sapphire laser (1996)
    Springer
    Applied physics 63 (1996), S. 121-124 
    Details
    ISSN: 1432-0649
    Keywords: 42.65 ; 51.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract More than thirty rotational lines equally spaced by 587 cm−1 are generated simultaneously in the vicinity of the fundamental line by four-wave Raman mixing using a high-power picosecond Ti:Sapphire laser as a pump source and hydrogen as a Raman medium. Since the wavelength of this multifrequency laser emission extends from the near-infrared to the near-ultraviolet, it can be utilized as a tunable light source for picosecond spectroscopy. Because of the wide spectral bandwidth available, this procedure has great potential for the generation of ultrashort laser pulses by mode-locking these emission lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01095260
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Generation of multi-color stimulated raman emission from two-color linearly or circularly polarized pump beams (1993)
    Springer
    Applied physics 56 (1993), S. 259-262 
    Details
    ISSN: 1432-0649
    Keywords: 42.65 ; 51.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A laser beam at two different frequencies separated by 587 cm−1 is focused into pressurized hydrogen (rotational transition energy, 587 cm−1) to generate multi-color stimulated Raman emission. The polarization state and the pulse energy are measured for each generated emission line using linearly and circularly polarized pump beams. The effect of the polarization is discussed by using a parameter characterizing the polarizability of hydrogen and a conservation rule for the angular momentum in four-wave mixing. Many rotational lines are generated with linearly polarized pump beams through a four-wave mixing process. This is in striking contrast to the results obtained by using a single-color circularly polarized pump beam which generates only one rotational line through a conventional stimulated Raman process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325213
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    Paper (German National Licenses)
    Fulltext
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