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Measurement of photon echoes in Er:Y2SiO5 at 1.5 µm with a diode laser and an amplifier

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Abstract

We have measured the optical dephasing time of Er3+ transitions near 1.5 µm in the two crystallographically inequivalent sites of Y2SiO5, using an external-cavity diode laser amplified by an erbium-doped fiber amplifier. Two-pulse photon echoes were observed at zero field and in magnetic fields up to 55 kG, with dephasing times as long as 580 µs (corresponding to a linewidth of 550 Hz). Stimulated echoes were also measured and showed evidence of spectral diffusion during the 13-ms lifetime of the  4I13/2 level.

© 1997 Optical Society of America

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