A mode whose magnetic field vector is normal to the direction of propagation . Note: TM modes may be useful in waveguides. In an optical fiber , TE and TM modes correspond to meridional rays .
TRANSVERSE MAGNETIC (TM) MODE
Meaning of TRANSVERSE MAGNETIC (TM) MODE in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012