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Intermodal Raman scattering between full vectorial modes in few moded fiber

We experimentally investigate intermodal Raman interaction. The pump is in the fundamental mode, HE<sub>11</sub>, and the signal is in either of two full vectorial modes, TM<sub>01</sub> or TE<sub>01</sub>. The on-off gain is approximately 3 dB for both modes, using 4 km of few-moded fiber and 400 mW of pump power.