Near quantum-limited phase memory in a Raman amplifier

Journal Article · Mon Oct 28 04:00:00 EST 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.2446· OSTI ID:5045830

Smithey, D T; Belsley, M; Wedding, K; Raymer, M G ^[1]

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1. Department of Physics, University of Oregon, Eugene, Oregon (USA)

We have detected molecular coherence lasting nearly 9 times the collisional dephasing time in a Raman amplifier. Two laser pulses, separated in time, pumped a common set of hydrogen molecules, producing two Stokes pulses whose relative phase was measured interferometrically. The variance of this phase is a direct measure of the memory of the molecular coherence induced by the first scattering process. This experiment is capable of detecting a level of molecular coherence equivalent to between 15 and 50 vibrational phonons in the most strongly excited mode.

• OSTI ID: 5045830
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:18; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AMPLIFIERS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
HYDROGEN
INTERFEROMETRY
LASER RADIATION
MOLECULES
NONMETALS
OPTICAL PUMPING
PHASE SHIFT
PHONONS
PULSES
PUMPING
QUANTUM ELECTRONICS
QUASI PARTICLES
RADIATIONS
RAMAN EFFECT