Coherent population trapping via a continuum with a train of ultrashort pulses

Journal Article · Fri Sep 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.033804· OSTI ID:20857755

Kuznetsova, Elena; Kolesov, Roman; Kocharovskaya, Olga ^[1]

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1. Department of Physics, Texas A and M University, College Station, Texas 77843-4242 (United States)

We consider the coherent population trapping effect with a train of ultrashort pulses in a {lambda}-type system with two bound states and a continuum replacing the upper state. Population transfer to the continuum can be totally suppressed provided that the splitting between the bound states is a multiple of the pulse repetition rate. Compared to the traditional case with only two laser fields coupling the bound states to the continuum, CPT with a pulse train allows one to avoid incoherent population losses due to interaction of the fields with 'wrong' transitions, which results in only partial suppression of ionization. A method of suppression of excited-state absorption of pumping radiation in laser crystals, with pumping in the form of the pulse train, is proposed. As a particular example pumping dynamics of a Ti{sup 3+}:YAlO{sub 3} crystal using this technique is numerically analyzed.

• OSTI ID: 20857755
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALUMINATES
BOUND STATE
COUPLING
CRYSTALS
EXCITED STATES
IONIZATION
LASER RADIATION
LOSSES
OPTICAL PUMPING
PULSES
RADIATION PRESSURE
TITANIUM
TITANIUM IONS
TRAPPING
VELOCITY
YTTRIUM COMPOUNDS