Open AccessUltra-rapid dispersion measurement in optical fibers
Author(s) -
Wolfgang Wieser,
Benjamin R. Biedermann,
Thomas Klein,
Christoph M. Eigenwillig,
Robert Huber
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.022871
Subject(s) - optics , dispersion (optics) , wavelength , amplitude , fourier transform , time domain , laser , materials science , physics , quantum mechanics , computer science , computer vision
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.