High and uniform coherence creation in Doppler broadened double lambda-like atomic system by a train of femtosecond optical pulses

Abstract

We present a detailed analysis of coherence creation in a four level double lambda-like atomic system using a train of ultra-short few-cycle Gaussian pulses. The effect of the Doppler broadening has been analyzed. It is possible to create high coherence across all the velocity groups in the atomic ensemble using pulses with low repetition frequency. The accumulation of coherence at different radial locations within the atomic beam cross-section as a function of the number of pulses in the train is also reported. We find that pulse train with lower repetition frequencies are able to generate high and nearly uniform coherence in a substantial part of the atomic system.

8 pages;8 figures. arXiv admin note: substantial text overlap with arXiv:1401.3417

References in corpus (4)

• Control of Four-Level Quantum Coherence via Discrete Spectral Shaping of an Optical Frequency Comb
• Optical Force on Two-level Atoms by Few-cycle Pulsed Gaussian Laser field beyond the Rotating Wave Approximation
• Optical dipole force on ladder-like three-level atomic systems driven by chirped few-cycle-pulse laser fields
• Simultaneous control of optical dipole force and coherence creation by super-Gaussian femtosecond pulses in lambda-like atomic systems