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Free Electron Lasers and Other Advanced Sources of Light Scientific Research Opportunities (1994) / Chapter Skim
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4 NEAR-INFRARED, VISIBLE, AND ULTRAVIOLET REGION: 10 um to 200 nm
Pages 32-35

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From page 32...
... The fingerprint region containing fundamental molecular vibrations is in the infrared portion of the spectrum, and excitation of valence electrons in chemical bonds requires light of ultraviolet wavelengths. Excitation of semiconductors using photons with energies larger than or comparable to the band gap requires light with wavelengths ranging from the visible to the infrared.
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From page 33...
... These solid-state devices, which produce tunable fundamental radiation in the range of 700 nm to 1100 nm, are excellent for mode-locking to create the short pulses that are efficient for producing other wavelengths by nonlinear processes. Other tunable solid-state lasers such as those based on forsterite or alexandrite, although less developed commercially, also provide tunable fundamental radiation, and, in all cases, nonlinear doubling and mixing techniques extend the wavelength range far beyond the fundamental region.
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From page 34...
... The committee learned from two large scientific laser companies (Spectra Physics and Coherent) that the average fraction of their sales of lasers for scientific research in the United States is 34%, and, thus, it estimates that the annual expenditure on laboratory research lasers in this country is about $37M.
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From page 35...
... 3. In the near-infrared, visible, and ultraviolet regions, support for additional free electron lasers should receive relatively low priority with respect to support of conventional lasers and with respect to support for free electron lasers in other wavelength regions.
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Key Terms

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  • free electron
  • wavelength region
  • conventional lasers
  • wavelength regions

  • research lasers
  • optical parametric
  • conventional laboratory
  • requires light
  • nonlinear techniques

  • involves simultaneous
  • light sources
  • vanderbilt university
  • technology comes
  • sophisticated laboratory

  • laser companies
  • fundamental region
  • region generate
  • surgical studies
  • stimulated raman

  • pulse width
  • ultraviolet regions
  • fundamental range
  • applied aspects
  • interrogation steps

  • parametric oscillators
  • wide tunability
  • spectra physics
  • involve using
  • coherent sources


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