title: Ultra-rapid dispersion measurement in optical fibers.
abstract: We present a novel method to measure the chromatic dispersion of fibers with lengths of several kilometers. The technique is based on a rapidly swept Fourier domain mode locked laser driven at 50kHz repetition rate. Amplitude modulation with 400MHz and phase analysis yield the dispersion values over a 130nm continuous wavelength tuning range covering C and L band. The high acquisition speed of 10micros for individual wavelength-resolved traces Deltat(lambda) can reduce effects caused by thermal drift and acoustic vibrations. It enables real-time monitoring with update rates >100Hz even when averaging several hundred acquisitions for improved accuracy.
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstr. 67, 80538 Munich, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Wieser
authors.forename: Benjamin R
authors.initials: BR
authors.lastname: Biedermann
authors.forename: Thomas
authors.initials: T
authors.lastname: Klein
authors.forename: Christoph M
authors.initials: CM
authors.lastname: Eigenwillig
authors.forename: Robert
authors.initials: R
authors.lastname: Huber
mesh_terms: D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods; D007834:Lasers; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods