CONSTRAINTS ON Z' FROM W- PRODUCTION AT THE NLC WITH POLARIZED BEAMS(W)

We discuss the potential of NLCS00 and NLC1000 to probe Z-Z' mixing an d mass by the reaction e(+)e(-)-->W+W- with longitudinally polarized e lectrons. We perform a model-independent analysis of the deviations fr om the Standard Model, and apply it to a specific class of extended we ak gauge models. Results indicate that the corresponding bounds at the NLC500 complement the present ones obtained from LEP1, and rapidly be come quite stringent at the higher energy of the NLC1000. Also, we emp hasize the importance of initial beam polarization in improving the se nsitivity to the mixing.