  The protection of qubit coherence is an essential task in order to build a
practical quantum computer able to manipulate, store and read quantum
information with a high degree of fidelity. Recently, it has been proposed to
increase the operation time of a qubit by means of strong pulses to achieve a
dynamical decoupling of the qubit from its environment. We propose and
demonstrate a simple and highly efficient alternative pulse protocol based on
Floquet modes, which increases the decoherence time in a number of materials
with different spin Hamiltonians and environments. We demonstrate the regime
$T_2\approx T_1$, thus providing a route for spin qubits and spin ensembles to
be used in quantum information processing and storage.
