Accession Number : ADA136511

Title :   Fabry-Perot Interference Filters.

Descriptive Note : Technical rept.,


Personal Author(s) : Gross,R W F

PDF Url : ADA136511

Report Date : 01 Dec 1983

Pagination or Media Count : 14

Abstract : The discrimination of coherent, laser radiation from incoherent, white-light radiation can be accomplished with properly designed interference filters that make use of the coherent nature of laser radiation in addition to its narrow-band spectral character. In this study it is assumed that we wish to block high power laser radiation from a detector without impeding its ability to see light emitted by broad-band, incoherent, weak continuum sources. We analyze two types of Fabry-Perot, air spaced filters: (1) the tunable two- or multiplate Fabry-Perot interferometer and (2) a multiplate stack of 1/4-wave plates. It is shown that the Fabry-Perot interferometer has a limited rejection ratio for coherent radiation, but offers the possibility of relatively large tuning range. By contrast, the rejection ratio for coherent radiation of quarter-wave plates can be made as large as 10000 with a white-light transmission of 20%, and a bandwidth delta lambda/lambda sub O = 0.03. However, the tuning range of such a stack will be limited. (Author)

Descriptors :   *Fabry perot interferometers, *Optical filters, Interference, Coherent radiation, Monochromatic light, Laser beams, Narrowband, Spectra, Tuning, White light, Incoherent scattering

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE