  A novel two-mode non-degenerate squeezed light is generated based on a
four-wave mixing (4WM) process driven by two pump fields crossing at a small
angle. By exchanging the roles of the pump beams and the probe and conjugate
beams, we have demonstrated the frequency-degenerate two-mode squeezed light
with separated spatial patterns. Different from a 4WM process driven by one
pump field, the refractive index of the corresponding probe field $n_{p}$ can
be converted to a value that is greater than $1$ or less than $1$ by an angle
adjustment. In the new region with $n_{p}<1$, the bandwidth of the gain is
relatively large due to the slow change in the refractive index with the
two-photon detuning. As the bandwidth is important for the practical
application of a quantum memory, the wide-bandwidth intensity-squeezed light
fields provide new prospects for quantum memories.
