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Highly sensitive dispersion measurement of a high-power passive optical resonator using spatial-spectral interferometry

: Pupeza, I.; Gu, X.; Fill, E.; Eidam, T.; Limpert, J.; Tünnermann, A.; Krausz, F.; Udem, T.

Postprint (1.3 MByte; PDF; )

Optics Express 18 (2010), No.25, pp.26184-26195
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IOF ()

We apply spatially and spectrally resolved interferometry to measure the complex ratio between the field circulating inside a high-finesse femtosecond enhancement cavity and the seeding field. Our simple and highly sensitive method enables the measurement of single-round-trip group delay dispersion of a fully loaded cavity at resonance for the first time. Group delay dispersion can be determined with a reproducibility better than 1 fs2 allowing the investigation of nonlinear processes triggered by the high intracavity power. The required data acquisition time is less than 1 s.