Absence of magnetic field (B $\leq$ 33~T) induced effects in the mid-infrared properties of La$_{2-x}$Sr$_{x}$CuO$_4$ films with 0~$\leq$~x~$\leq$~0.16

We have performed magneto-transmission measurements on a series of La$_{2-x}$Sr$_{x}$CuO$_4$ films with magnetic fields up to 18 Tesla. Studied samples include doping levels x= 0, 0.1, 0.3, 0.45, 0.6, 0.8, 0.10. In addition, an optimally doped film (x= 0.16) was studied in magnetic fields as high as 33 Tesla, both below and above its superconducting critical temperature T$_c$=\,41\,K. In neither of the studied samples we could detect any field-induced changes of transmission in the mid- infrared energy range (between about 1000 and 3500 cm$^{-1}$). We discuss how these observations can enhance our current understanding of medium energy range excitations in the cuprates, and their relation to high temperature superconductivity.