Accession Number : ADD011840

Title :   Picosecond Broadband CARS Probe Using the Picosecond Continuum.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Goldberg,L S

Report Date : 23 Apr 1985

Pagination or Media Count : 8

Abstract : A coherent anti-Stokes Raman spectroscopy (CARS) method and apparatus for producing a broadband CARS vibrational spectrum of a sample in a single picosecond laser pulse. A laser pulse having a picosecond duration and a frequency of omega is directed into a liquid cell containing D2O which generates a picosecond continuum pulse having a broad range of frequencies omega (WL) and a picosecond duration. A second harmonic of the laser pulse is produced to form a probe pulse having a frequency of omega (1) and a picosecond duration. The probe pulse and the continuum pulse are spatially and temporally combined and the combined pulses are directed into a sample to excite the Raman active vibrational resonances in the sample. In response the sample emits a beam of radiation which contains an anti-Stokes spectrum of energy characteristic of the sample. The anti-Stokes spectrum is separated from the beam of radiation for detection and analysis.

Descriptors :   *PATENTS, *RAMAN SPECTROSCOPY, *STOKES RADIATION, *LASER BEAMS, *COHERENT SCATTERING, PULSED LASERS, DYE LASERS, VISIBLE SPECTRA, VIBRATIONAL SPECTRA, PROBES, RADIATION, COHERENCE, PULSES, VIBRATION, DETECTION, SPECTRA, RESONANCE, INVENTIONS, MULTIPLEXING, LIQUIDS, METHODOLOGY, BROADBAND, CELLS

Subject Categories : Lasers and Masers
      Test Facilities, Equipment and Methods
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE