A novel two-beam interferometer for the measurement of a refractive index or its induced changes is described. This interferometer consists of only two optical elements and is largely insensitive to their movement. A laboratory prototype has been built. It uses a polarized version of the folded Jamin interferometer to allow for convenient phase adjustment.
© 1996 Optical Society of America
Original Manuscript: September 22, 1995
Published: March 15, 1996
H. Moosmüller and W. P. Arnott, "Folded Jamin interferometer: a stable instrument for refractive-index measurements," Opt. Lett. 21, 438-440 (1996)