Monitoring the dominance of higher-order chromatic dispersion with spectral interferometry using the stationary phase point method

作者：Grosz Timea; Kovacs Attila P; Mecseki Katalin; Gulyas Lenard; Szipocs Robert

来源：Optics Communications, 2015, 338: 292-299.

DOI：10.1016/j.optcom.2014.10.047

• Stationary phase point method
• Spectral interferometry
• Chromatic dispersion
• Photonic bandgap fiber
• Prism pair

Simulations were performed in order to investigate whether the stationary phase point method can be used to estimate the dominance of higher-order dispersion of the optical element under study. It was shown that different higher-order dispersion terms may result in the appearance of more than one stationary phase point on the interferogram in contrast to common glasses having group-delay dispersion as the highest decisive term in their spectral phase. The results obtained by simulations were demonstrated experimentally with spectral interferometric measurements conducted on a photonic bandgap fiber sample and a prism pair. We concluded that from the shape, movement and number of the stationary phase points it is generally possible to predict which dispersion terms are the most significant, however, in some cases the retrieval of the coefficients is also necessary in order to rule out any ambiguity. The method can offer a dispersion monitoring possibility which is useful in quality testing of specialty fibers and when adjusting stretcher-compressor systems, for example.

• 出版日期2015-3-1