  Using double optical Raman rephasing, an inversion-free resonant Raman echo
is studied in an inhomogeneously broadened spin ensemble of a solid medium,
where the Raman optical field-excited spin coherence has a frozen propagation
vector. Unlike photon echoes whose quantum memory application is strictly
limited due to \pi rephasing pulse-induced population inversion causing quantum
noises, the optical Raman field-excited spin echo is inherently silent owing to
the frozen propagation vector. Thus, the doubly rephased Raman echo can be
directly applied for quantum interface in a population inversion-free
environment.
