Accession Number : ADA323362

Title :   Femtosecond Infrared Vibration Dynamics Spectrometer for the Study of Supercritical Fluids and Energetic Materials.

Descriptive Note : Final rept. 1 Dec 94-29 Nov 96,

Corporate Author : STANFORD UNIV CA DEPT OF CHEMISTRY

Personal Author(s) : Fayer, Michael D.

PDF Url : ADA323362

Report Date : NOV 1996

Pagination or Media Count : 6

Abstract : We developed a solid-state tunable mid-IR femtosecond laser system based on a regeneratively amplified Ti:sapphire oscillator. To obtain the desired mid-IR output, a two stage optical parametric amplifier (OPA) was utilized to create two near-IR colors which were subsequently used to produce the desired mid-IR wavelength via difference frequency generation (DFG) in a LiIO3 crystal. Seeding of the OPA was accomplished using the white light continuum produced by the self phase modulation of a Ti:sapphire laser beam focused down into a flow cell containing ethylene glycol. The system design allows for both temporal (i.e., bandwidth) and frequency tuning, affording the user complete output control

Descriptors :   *PULSED LASERS, *INFRARED LASERS, *INTERMEDIATE INFRARED RADIATION, OSCILLATORS, LASER PUMPING, SOLID STATE LASERS, TUNABLE LASERS, MOLECULAR VIBRATION, LASER BEAMS, SAPPHIRE, SUPERCRITICAL FLOW, TITANIUM, ENERGETIC PROPERTIES, NEAR INFRARED RADIATION, SHORT PULSES, INFRARED SPECTROMETERS, WHITE LIGHT, PHASE MODULATION, ETHYLENE GLYCOL, DIFFERENCE FREQUENCY, PARAMETRIC AMPLIFIERS, IODATES.

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE