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Measurement accuracy of interferometers with self-pumped phase-conjugated mirrors

: Krause, A.; Notni, G.


Journal of the Optical Society of America. B, Optical physics 13 (1996), Nr.11, S.2558-2568
ISSN: 0740-3224
ISSN: 1520-8540
Fraunhofer IOF ()
aspherical surface; interferometer; self-pumped phase-conjugating mirror; SPPCM

Quantitative measurements of accuracy of interferometers with self-pumped phase-conjugate mirrors (SPPCM's) involving the application of different kinds of SPPCM's as the reference mirror, the cat-conjugator SPPCM, the backscattering SPPCM, and an external resonator SPPCM are shown, for the first time to our knowledge. We prove that the only way to archieve the same measurement accuracy as with classical interferometric systems is by use of the cat-conjugator SPPCM. Because of external feedback in both of the other types of SPPCM, a phase error is introduced, resulting in a phase error in the interferogram. In addition, experimental data describing the time behaviour of SPPCM's, which is important for some interfreometric applications, are given. An interferometer with a SPPCM for testing aspherical surfaces is presented.