McAuslan, D. L.Ledingham, Patrick M.Naylor, William R.Beavan, SarahHedges, MorganSellars, MatthewLongdell, Jevon Joseph2015-12-101050-2947http://hdl.handle.net/1885/50703Here, we propose a solid-state quantum memory that does not require spectral holeburning, instead using strong rephasing pulses like traditional photon-echo techniques. The memory uses external broadening fields to reduce the optical depth and so switch off the collective atom-light interaction when desired. The proposed memory should allow operation with reasonable efficiency in a much broader range of material systems, for instance Er3+ doped crystals which have a transition at 1.5 μm. We present analytic theory supported by numerical calculations and initial experiments.Author/s retain copyrightKeywords: Analytic theory; Atom-light interactions; Doped crystals; Material systems; Memory use; Numerical calculation; Optical depth; Quantum memories; Spectral-hole burning; Two-level atom; Photons; Quantum theory201110.1103/PhysRevA.84.0223092016-02-24