Vibrational dephasing measurements with cw mode-locked dye lasers

Journal Article · Sun Apr 01 04:00:00 EST 1979 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.90838· OSTI ID:6279636

Heritage, J P

Recent advances in the development of synchronously mode-locked dye-laser systems have permitted the first low-power measurement of the time-resolved dephasing dynamics of a Raman active molecular vibration. Excitation and delayed probing of the coherent ensemble of vibrators is accomplished with the help of synchronized picosecond pulse trains from two independently tunable mode-locked dye lasers. A new probe technique, based on a gain measurement, is employed that provides a signal that scales linearly with the coherent vibrational amplitude. We demonstrate this technique with the first measurement of the dephasing dynamics of the normal mode (656.5 cm/sup -1/) of CS/sub 2/ in the liquid state. An exponential decay with time constant 20 +- 1 psec is obtained for the isotropic component of the coherent scattering.

• Research Organization: Bell Telephone Laboratories, Holmdel, New Jersey 07733
• OSTI ID: 6279636
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 34:7; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLITUDES
CARBON COMPOUNDS
CARBON SULFIDES
CHALCOGENIDES
COHERENT SCATTERING
DECAY AMPLITUDES
DYE LASERS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GAIN
LASERS
LIQUIDS
MOLECULES
OSCILLATION MODES
PULSES
RAMAN EFFECT
SCATTERING
SULFIDES
SULFUR COMPOUNDS
TIME DEPENDENCE
TRANSITION AMPLITUDES
VIBRATIONAL STATES