Diffraction Loss in Dielectric-Filled Fabry-Perot Interferometers
- 1 May 1982
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 30 (5) , 820-823
- https://doi.org/10.1109/tmtt.1982.1131145
Abstract
We analyze the transmission of dielectric-filled Fabry-Perot interferometers excited by a spherical wave having a Gaussian amplitude distribution transverse to the axis of propagation. The loss due to diffraction experienced by the incident mode is found to be reduced by a factor /spl ges/ n/sup 4/ when n, the index of refraction of the dielectric, is significantly greater than unity, thus permitting such devices to be used with low loss in beams of considerably angular divergence than possible with air-filled interferometers. Measurements at 3-mm wavelength of devices made of quartz and sapphire are presented, which are in good agreement with theoretical calculations.Keywords
This publication has 6 references indexed in Scilit:
- A Quasioptical Feed System for Radioastronomical Observations at Millimeter WavelengthsBell System Technical Journal, 1977
- Quasioptical band-rejection filter at 100 GHzReview of Scientific Instruments, 1976
- Walk-Off Effects in Fabry-Perot DiplexersIEEE Transactions on Microwave Theory and Techniques, 1974
- Optical Constants of Far Infrared Materials 2: Crystalline SolidsApplied Optics, 1973
- Far-infrared properties of metallic mesh and its complementary structureInfrared Physics, 1967
- Laser Beams and ResonatorsApplied Optics, 1966