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  4. Optical measurements with phase-conjugate mirrors
 
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1999
Journal Article
Title

Optical measurements with phase-conjugate mirrors

Abstract
Phase-conjugate mirrors on the basis of photorefractive crystals offer interesting possibilities of application for optical measurement systems. In this paper we report on the application of phase-conjugate mirrors (PCMs) for optical measurement techniques. We show different schemes for realizing PCNIs and discuss characteristics such as reflectivity, fidelity, and time behavior. We demonstrate that two-beam interferometers with PCNIs and with a suitable phase-shifting unit in the reference arm have general advantages compared with conventional systems. It is shown that self-pumped PCNIs (SPPCNIs) could also be successfully used for novelty filtering systems comparing a present state of a signal phase with a reference phase. It is found that SPPCNIs can improve both the axial and the lateral resolution of a confocal microscope. A 30% better resolution of the PCM system is established. We demonstrate that two-beam interferometers with PCNIs and with a suitable phase-shifting unit in the reference arm have general advantages compared with conventional systems. It is shown that self-pumped PCNIs (SPPCNIs) could also be successfully used for novelty filtering systems comparing a present state of a signal phase with a reference phase. It is found that SPPCNIs can improve both the axial and the lateral resolution of a confocal microscope. A 30% better resolution of the PCM system is established.
Author(s)
Kowarschik, R.
Wenke, L.
Baade, T.
Esselbach, M.
Kiessling, A.
Notni, G.
Uhlendorf, K.
Journal
Applied Physics. B  
Link
Link
DOI
10.1007/s003400050832
Language
English
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF  
Keyword(s)
  • PCM

  • phase-conjugate mirror

  • photrefractive crystals

  • self-pumped PCM

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