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Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Photon echoes in an amplifying rare-earth ion-doped crystal

Vincent Crozatier, Guillaume Gorju, Fabien Bretenaker, J.-L. Le Gouët, I. Lorgeré, E. Baldit, Kamel Bencheikh

Published Jan 25, 2006• 0 citations
Publisher

Abstract

In this contribution, we report on what is believed to be the first experimental demonstration of photon echoes in an amplifying rare-earth ion-doped crystal and highlighted the advantages of the process. It considerably improves the diffraction efficiency and the echo power in single shot, up to a factor 3 in our relatively low optical density sample.

DOI
10.1109/cleoe.2005.1567949

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In this contribution, we report on what is believed to be the first experimental demonstration of photon echoes in an amplifying rare-earth ion-doped crystal and highlighted the advantages of the process. It considerably improves the diffraction efficiency and the echo power in single shot, up to a factor 3 in our relatively low optical density sample.
We have observed various types of photon echoes in a rare-earth doped crystal using a broad-band c.w. dye laser. Even at the very low spectral power density of the laser, the quantum efficiency of photon echo generation is as large as those using high-power or narrow-band lasers. We have observed Carr-Purcell type photon echo series for the first time in a rare-earth doped crystal. We have measured relaxation of two-pulse photon echo, three-pulse stimulated photon echo, and many-pulse Carr-Purcell photon echo, and found some new features.
In a solid-state ensemble of rare-earth ions, we have experimentally generated a photon-echo of a spontaneous emission event, a process referred to as rephased amplified spontaneous emission (RASE). An enabling step for this demonstration was to use a double-Λ energy level structure for the photon-echo, rather than a standard two-pulse/two-level photon echo sequence, such that the single-photon echo is spectrally and spatially distinguishable from the coherent emission that follows imperfect π-pulses.