مقایسهٔ روش‌ها

	روش انتشار پرتو	روش تفاضل محدود در حوزه زمان
حوزه	اپتیک	اپتیک
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1978	1966
پدیدآور	Michael Feit and John Fleck	Kane Yee
نوع	Paraxial propagation algorithm	Finite-difference algorithm
منبع بنیادین	Feit, M. D., & Fleck, J. A. (1978). Light propagation in graded-index optical fibers. Applied Optics, 17(24), 3990-3998.	Yee, K. S. (1966). Numerical solution of initial boundary value problems involving Maxwell's equations in isotropic media. IEEE Transactions on Antennas and Propagation, 14(3), 302-307.
نام‌های دیگر	BPM, paraxial approximation method	FDTD, Yee scheme
مرتبط	3	3
خلاصه	The Beam Propagation Method is a computational technique for simulating the propagation of optical beams through slowly varying, weakly guiding structures. Developed by Feit and Fleck in 1978, BPM exploits the paraxial approximation to reduce the full vector wave equation to a scalar or vector envelope equation, enabling efficient simulation of waveguides, integrated optics, and photonic devices.	The Finite-Difference Time-Domain method is a computational technique for solving Maxwell's equations by discretizing space and time on a grid. Introduced by Kane Yee in 1966, FDTD is a foundational approach in computational electrodynamics and optical simulation, enabling direct modeling of electromagnetic wave propagation through complex media.