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RESEARCH PRODUCT

Atomic Coherence Effects in Doppler-Broadened Three-Level Systems with Standing-Wave Drive

F. SilvaVerònica AhufingerRamón CorbalánJordi Mompart

subject

Physicsbusiness.industryElectromagnetically induced transparencyLaserAtomic coherencelaw.inventionStanding wavesymbols.namesakeOpticsCascadelawsymbolsHalf-integerPhysics::Atomic PhysicsAtomic physicsbusinessDoppler effectDoppler broadening

description

We study atomic coherence effects (e.g., electromagnetically induced transparency, EIT, and amplification without inversion, AWI) for a probe travelling-wave (TW) laser field in closed Doppler-broadened three-level systems driven by a standingwave (SW) laser field of moderate intensity (its Rabi frequencies are smaller than the Doppler width of the driven transition). We show that probe windows of transparency occur only for values of the probe to drive field frequency ratio R close to half integer values. For optical transitions and typical values of Doppler broadening for atoms in a vapor cell, we show that for R > 1 a SW drive field is appreciably more efficient than a TW drive in inducing probe transparency. We show that folded (cascade) schemes driven by a sufficiently detuned SW field can exhibit AWI for odd (even) values of R. Results for AWI with frequency up-conversion ratios R = 3 and 4 are presented and compared to those obtained with a TW drive.

yearjournalcountryeditionlanguage
2001-01-01
https://doi.org/10.1007/3-540-45409-8_12