This paper describes a device for separating a laser radiation beam in the reference channel of a Fourier spectrometer into two beams, shifted in phase by π/2. This make it possible to constantly monitor the sign of the rate of change of the optical path difference. A plane-parallel glass plate tilted at a definite adjustable angle and overlapping half the laser radiation beam is mounted in one arm of the interferometer.
© 2011 OSA
Original Manuscript: January 11, 2011
Published: July 14, 2011
B. E. Moshkin, S. V. Maksimenko, and A. V. Shakun, "Quarter-wave plate in a Fourier spectrometer," J. Opt. Technol. 78, 386-388 (2011)