Properties of magnetostatic wave propagating in YIG waveguide under inclined magnetization

The characteristics of magnetostatic forward volume (MSFVWs) propagating in magneto-optical (MO) film waveguide under inclined bias magnetic field are analyzed, The dependences of MSFVW propagation constant and dynamic magnet ization related to the MO coupling coefficients on mode number, frequency a nd inclined bias magnetic field are calculated in detail. It is shown that the greater the MSFVW frequency f and the mode number m as well as the less bias magnetic field H-i and inclination theta, the greater MSFVW propagati on constant K-s, is; the amplitude of zero-mode MSFVWs is much greater than that of high-mode MSFVWs. In an appropriate frequency range, MSFVW amplitu de can be increased under an inclined bias magnetic field, and then the dif fraction efficiency of guided optical waves with MSFVWs is improved.