APPLICATION OF A DISPERSIVE ELEMENT FOR ADJUSTMENT OF ZEHNDER — MACH INTERFEROMETER
ITMO University, Department of Computer Photonics and Digital Video Processing; Associate Professor
V. V. Zyuzin
St. Petersburg State University of Information Technologies, Mechanics and Optics; Department of Optical Instruments Computerization and Design; Student
M. G. Lukin
St. Petersburg State University of Information Technologies, Mechanics and Optics; Department of Optical Instruments Computerization and Design; Student
S. A. Marusov
St. Petersburg State University of Information Technologies, Mechanics and Optics; Department of Optical Instruments Computerization and Design; Student
V. I. Mischenko
St. Petersburg State University of Information Technologies, Mechanics and Optics; Department of Optical Instruments Computerization and Design; Student
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Abstract. Principles of spectral interferometry are formulated, and mechanism of moiré fringe pattern formation is described for the case of a dispersive element introduced at the interferometer output. The dispersive element application is shown to expand dynamic range of fringe registration when zero path difference is searched for, and to simplify and accelerate the interferometer adjustment.
Keywords:
spectral interferometry principles, Zehnder — Mach interferometer, moiré fringe, wave train, coherent wave length.
