title: Cutoff-wavelength determination in single-mode fibers by mode interference.
abstract: An effective cutoff wavelength lambda(ceff) in single-mode fibers is defined, and a simple interferometric method for its determination is demonstrated. This method is essentially independent of launching conditions and differential mode attenuation. At lambda(ceff) the power fraction of the LP(11) mode in the core is less than 1/e.
authors.forename: E
authors.initials: E
authors.lastname: Brinkmeyer
authors.forename: S
authors.initials: S
authors.lastname: Heckmann