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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › Why FDTD uses pulsed light source excitation instead of sine wave light source？ › Reply To: Why FDTD uses pulsed light source excitation instead of sine wave light source？

October 22, 2021 at 6:03 pm
Guilin Sun
Ansys Employee
The Chinese version is here: Ansys Insight: FDTD õ©║õ╗Çõ╣êÚççþö¿ÞäëÕå▓Õàëµ║ɵ┐ÇÕè▒ÞÇîõ©ìÚççþö¿µ¡úÕ╝ªµ│óÕàëµ║É
Basically, whether you want a broadband or single-frequency result, the simulation with pulse source is much faster than using a sinusoidal wave, which will need an initial transient time, and then long steady state time in order to get the result at only a single frequency.