We discuss the theory and error analysis for an ultrasensitive refractive index detector based
on the two-frequency Zeeman effect laser. Experimental measurements on gases agree …

National Research Laboratory of Metrology, 1-1,4 Umezono Sakura-mura, Niihari-gun,
Ibaraki 305, Japan (Xlv/nl)(X2v/n 2) Page 1 Volume 44, number 1 OPTICS …

The apparatus in precise scanning-wavelength interferometry with gases is described. The
dispersion of the refractive index is measured with the aid of an evacuated Michelson …

Refractive index measurements of air and pure gases have been carried out by using laser
heterodyne interferometry. Measurement accuracy better than a few parts into 10 7 for …

We present a two-frequency laser interferometer with high measurement resolution. The
inter ferometer relies on the use of a two-frequency Zeeman effect laser. The He-Ne laser …

This paper presents new developments of the BNM-INM heterodyne compact refractometer.
Air refractive index measurements have been made at 633 nm with a relative uncertainty of …

The group refractive index of air in laboratory conditions is measured directly between
adjacent femtosecond laser pulses by a new interferometry technique. Measurement of the …

Quadrature Fringe Imaging Interferometer for Index of Refraction Measurements Page 1
LTh4F.2.pdf OSA Optical Sensors and Sensing Congress 2020 (AIS, LACSEA, SENSORS …

In two-wavelength interferometry, synthetic wavelengths are generated in order to reduce
the sensitivity or to extend the range of unambiguity for interferometric measurements. Here …

In this paper a refractometer system with an integrated optical sensor is presented. The
sensitive element is a single or multichannel Mach-Zehnder interferometer (MZI) fabricated …