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Er3+:LiYF4 is a material where optical inhomogeneous linewidths are smaller than hyperfine splittings, which could be advantageous for quantum information processing protocols. We investigated the Zeeman and hyperfine structures under magnetic field by optical spectroscopy at 1.5μm and found a good agreement with calculations based on crystal field wavefunctions. Since Zeeman splittings have a non-linear...
In this new architecture of extended cavity diode laser, broadband tunability is provided by an acousto-optical tunable filter with a longitudinal interaction. The laser offers single mode operation, >100 nm accordability, and two-wavelength operation capability.
We use a pulse-compression chirp-transform algorithm to generate broadband photonic arbitrary waveforms. A phase-locked loop frequency agile laser provides the needed broadband frequency scans. The experiment operates at the telecom wavelength of 1.5μm.
We report on the demonstration of the chirp transform algorithm for the optical processing of wide band RF signals. The process uses photon echoes in an Er3+:YSO crystal at 1536 nm. The analysis covers a 1.5 GHz instantaneous bandwidth together with more than 20,000 independent channels. These performances require a frequency agile laser source that is phase-locked in order to take advantage of the...
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