  We report the observation of laser induced birefringence (LIB) in a
wavelength-mismatched cascade system (J=0 \leftrightarrow J=1 \leftrightarrow
J=0 transitions) of inhomogeneously broadened ytterbium atoms with strong pump
and probe fields. We investigate the transmission spectrum of two circular
polarization (\sigma_p^+ and \sigma_p^-) components of strong probe field at
fixed frequency, depending on the detuning of circularly polarized (\sigma_c^-)
coupling field from two-photon resonance. We find that \sigma_p^+ (\sigma_p^-)
polarized component exhibits a narrow electromagnetically induced absorption
(transparency) spectrum. Numerical solutions of density matrix equations show
qualitative agreement with experimental results. A Doppler-free dispersive LIB
signal is obtained by detecting the Stokes parameter of the probe field,
enabling us to stabilize the frequency of coupling laser without frequency
modulation.
