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
Original Manuscript: September 14, 1988
Manuscript Accepted: March 17, 1989
Published: June 15, 1989
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)