We present measurements of the vacuum Rabi splittings associated with
the fundamental and the first three excited magnetoexcitons in a semic
onductor microcavity up to 9 T. The oscillator strength values which a
re deduced from these experiments are compared to a simple and origina
l variational calculation which includes the low magnetic-field (excit
onlike) limit and the high magnetic-field (cyclotronlike) limit. Theor
etical and experimental results are compared and discussed.