Pump-and-probe optical transmission phase shift as a quantitative probe of the Bogoliubov dispersion relation in a nonlinear channel waveguidePierre-Élie Larré, Stefano Biasi, Fernando Ramiro-Manzano, Lorenzo Pavesi and Iacopo CarusottoEur. Phys. J. D, 71 6 (2017) 146DOI: https://doi.org/10.1140/epjd/e2017-80208-5