Narrowband optical filter based on a Fabry–Perot interferometer with two waveguide–grating mirrors

The operation of a narrowband filter based on a Fabry-Perot interferometer formed by two waveguide-grating mirrors is studied upon normal incidence of light. In this case, two counterpropagating travelling waves and coupled modes are excited in a corrugated waveguide, while only one mode is excited...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2007-05, Vol.37 (5), p.475-478
Main Authors: Usievich, B A, Sychugov, V A, Nurligareev, J Kh
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTROMAGNETIC RADIATION
FABRY-PEROT INTERFEROMETER
FILTERS
GRATINGS
INTERFEROMETERS
MEASURING INSTRUMENTS
MIRRORS
OPTICAL FILTERS
PHASE SHIFT
RADIATIONS
REFLECTION
RESONANCE
SPECTRA
SYMMETRY BREAKING
TRANSMISSION
TRAVELLING WAVES
VISIBLE RADIATION
WAVEGUIDES
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Summary:The operation of a narrowband filter based on a Fabry-Perot interferometer formed by two waveguide-grating mirrors is studied upon normal incidence of light. In this case, two counterpropagating travelling waves and coupled modes are excited in a corrugated waveguide, while only one mode is excited in the case of oblique incidence of light on the filter. It is found that in the case of a small gap between the mirrors, the reflection spectrum of the interferometer depends on the phase shift {Delta}{phi} of one corrugation relative to the other. If light is incident normally on the interferometer, two or three lines appear in the transmission spectrum if {Delta}{phi} {ne} 0 or {Delta}{phi} {ne} {pi}. The appearance of the additional resonances is attributed to symmetry breaking in the system. At large distances between the mirrors, the spectra at {theta} = 0 do not exhibit any peculiarities. (laser devices and elements)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2007v037n05ABEH013328