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High magnetic fields up to 105 T have been utilized in deriving the uppercritical field $B_{\rm c2}$ of LaFeAsO$_{1-x}$H$_x$ throughout wholetemperatures below $T_{\rm c}$. Resistivity measurements demonstrate that$B_{\rm c2}$ behaves differently in samples with $x = 0.12$ (SC1) from thosewith 0.32 (SC2). In SC1, the two-band model assuming the $s$-wave pairing givesa good fitting with repulsive intraband interaction and dominant interbandcoupling. In SC2, we have to assume attractive intraband interaction with weakinterband coupling, which in fact suggests a non-$s$-wave pairing in view ofthe strong Coulomb repulsion. These results support the possibility that SC1and SC2 have different pairing symmetries.

Distinctive Doping Dependence of Upper Critical Field in Iron-Based Superconductor LaFeAsO$_{1-x}$H$_{x}$