Suitable functions fitted to transverse offset data for measuring the mode field diameter according to the Petermann II definition are investigated with the help of computer simulation using three different model functions. The Gaussian fit to points in the vicinity of the curve maximum gives the best results.
© 1988 Optical Society of America
Original Manuscript: November 5, 1987
Manuscript Accepted: February 25, 1988
Published: May 1, 1988
J. Streckert and J. Schirmer, "Transverse offset data processing for evaluating Petermann’s “strange” mode field diameter: a comparison of three methods," Opt. Lett. 13, 398-400 (1988)