Open AccessSubpicometer wavelength accuracy with gain-switched laser diode in high-resolution optical spectrometry
Author(s) -
Carlos Heras,
Jesús Subı́as,
J. Pelayo,
F. Villuendas,
Francisco M. Honrubia López
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.010658
Subject(s) - optics , laser diode , chirp , laser , wavelength , materials science , signal (programming language) , optical fiber , comb filter , resolution (logic) , optoelectronics , physics , bandwidth (computing) , telecommunications , computer science , programming language , artificial intelligence
We present a method to generate an optical reference comb signal with subpicometer wavelength accuracy. XPM nonlinear effect in a fiber is used to get an optical frequency comb signal, free of frequency chirp and wavelength instabilities, from a pulsed gain-switched laser diode. Principles of such comb generation are presented as well as the application of this comb as a ruler to measure frequency differences in high resolution optical spectrum measurements. To confirm this method, Brillouin filtering optical spectrometric technique is used to characterize a modulated optical source. Typical resolution of this technique allows 0.08 pm wavelength accuracy.