Subpicometer wavelength accuracy with gain-switched laser diode in high-resolution optical spectrometry.
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.
Heras
C
C
Grupo de Tecnologías Fotónicas, Instituto de Investigación en Ingeniería de Aragón (I3A), Universidad deZaragoza, 500018 Zaragoza, Spain. cdheras@unizar.es
Subías
J
J
Pelayo
J
J
Villuendas
F
F
López
F
F
D002138:Calibration; D004867:Equipment Design; D007834:Lasers; D055095:Optics and Photonics; D012031:Refractometry / Q000379:methods; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D013053:Spectrophotometry / Q000379:methods*