방법 비교

	빔 전파 방법	푸리에 광학
분야	광학	광학
계열	Process / pipeline	Process / pipeline
기원 연도	1978	1822
창시자	Michael Feit and John Fleck	Joseph Fourier and Ernst Abbe
유형	Paraxial propagation algorithm	Spectral decomposition method
원전	Feit, M. D., & Fleck, J. A. (1978). Light propagation in graded-index optical fibers. Applied Optics, 17(24), 3990-3998.	Goodman, J. W. (1968). Introduction to Fourier Optics. McGraw-Hill.
별칭	BPM, paraxial approximation method	frequency-domain optics, wave optics, diffraction theory
관련	3	3
요약	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.	Fourier optics is a mathematical framework that analyzes optical systems and phenomena using Fourier transforms and frequency-domain methods. Grounded in Joseph Fourier's 1822 work on heat diffusion and Ernst Abbe's microscopy theory, this approach decomposes optical fields into plane waves or spatial frequencies, revealing how optical systems manipulate and filter these components to produce images and transmit information.