A plane–parallel mesh Fabry-Perot resonant cavity has been used to determine the indices of refraction of a number of low-loss materials at 245.351 GHz using a C13H3F far-IR laser. The necessary apparatus is readily available in many far-IR laser laboratories and is readily extendable to other laser and millimeter-wave source frequencies. The values were compared to the measurements of other researchers at neighboring frequencies as available.
© 1983 Optical Society of America
Original Manuscript: September 8, 1982
Published: January 1, 1983
G. J. Simonis and R. D. Felock, "Index of refraction determination in the near-millimeter wavelength range using a mesh Fabry-Perot resonant cavity," Appl. Opt. 22, 194-198 (1983)