Fabry Perot Based Wavelength Filters

Fabry-Perot based wavelength filters 809 Fabry-Perot etalon, Brillouin scattering 719 Fabry-Perot resonator 579 fan textures 436 fanned-out inputs, SLM 798 Faraday balance 213 faults, thermography 832 ferrielectric phases (FIP) 120 external fields 513... 

The other interrogation schemes are based on the use of linear filters, matched gratings, interferometers (Michelson, Mach-Zender, Fabry-Perot), and CCD arrays in combination with diffraction gratings. The best resolution attainable after averaging is about 1 pm. LPGs, however, have a wider spectrum and their wavelength shifts are detected with smaller resolution. 

Up to now micromachined IR sources with appropriate emitted optical power for use in the NDIR gas analysers have not been fabricated In the gas analyser a commercial available, variable, long path absorption cell with low cost optical components should be used For the wavelength modulated gas sensors it is of interest to fabricate a tuneable Fabry Perot interferometer with Si micromachining technologies The fabrication of a Si etalon array with multispectral filters would provide the head component for a very sensitive and selective multicompound gas analyser based on correlation photometry... 

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