  We have studied stationary and quasi-stationary signal light pulses in cold
lambda-type atomic media driven by counterpropagating control laser fields at
the condition of electromagnetically induced transparency. By deriving a
dispersion relation we present spectral and temporal properties of the signal
light pulse and a significant influence of atomic decoherence on the coupled
stationary light pulses for spatial splitting. Finally we discuss
quasi-stationary light pulse evolution characterized by frozen spatial
spreading for a robust coherent control of slow light pulses.
