手法を比較

	ビーム伝搬法	ABCD行列
分野	光学	光学
系統	Process / pipeline	Process / pipeline
提唱年	1978	1966
提唱者	Michael Feit and John Fleck	Herwig Kogelnik and Tingye Li
種類	Paraxial propagation algorithm	Ray optics formalism
原典	Feit, M. D., & Fleck, J. A. (1978). Light propagation in graded-index optical fibers. Applied Optics, 17(24), 3990-3998.	Kogelnik, H., & Li, T. (1966). Laser beams and resonators. Applied Optics, 5(10), 1550-1567.
別名	BPM, paraxial approximation method	ray transfer matrix, ABCD method, system matrix
関連	3	3
概要	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 ABCD matrix, or ray transfer matrix method, is a compact algebraic framework for analyzing optical systems. Introduced by Kogelnik and Li in 1966, it represents the linear transformation of ray position and angle (or Gaussian beam parameters) through optical elements. This method is foundational in laser physics, Gaussian optics, and optical design, enabling rapid calculation of resonator stability, beam propagation, and system performance.