Abstract

A laser-diode phase-measuring interferometer with a BaTiO₃ self-pumped phase-conjugate mirror is presented that is based on a phase-shifting technique with a stepwise wavelength change by variation of the laser-diode current. The phase is shifted to produce a spatially uniform phase difference uncanceled by a phase conjugator between the beams in the two arms of the interferometer. The dc light buildup phase-conjugate reflectivities with a maximum of 60% versus time are measured for different incident angles to the crystal. The visibility of the interferograms is estimated by varying the pump-beam frequency of the laser diode. Experimental results of the phase measurement with a four-step method are shown.

© 1993 Optical Society of America

Interferometer with a self-pumped phase-conjugating mirror

Jack Feinberg
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