We introduce an algorithm to determine the relative modal weights of a laser beam with Hermite-Gaussian modes. The method is based on coherence theory of stable resonator modes in the space-frequency domain. Numerical simulations are presented that show that the algorithm is not sensitive to moderate levels of noise.
© 1989 Optical Society of America
Jari Turunen, Eero Tervonen, and Ari T. Friberg, "Coherence theoretic algorithm to determine the transverse-mode structure of lasers," Opt. Lett. 14, 627-629 (1989)