A narrow-band optical filter based on Fabry — Perot interferometer with one waveguide — grating mirror

Usievich, B. A.; Sychugov, V A; Parriaux, Ο.; Nurligareev, J Kh

doi:10.1070/qe2003v033n08abeh002480

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Recently we proposed and studied in details a narrow-band optical filter based on Fabry-Perot interferometer containing one waveguide grating mirror (WGM) and one ordinary multilayer mirror. It was found that the rapid change of the reflection phase near the resonance in the waveguide grating mirror gives rise to significant narrowing (~100 times) of the transmission spectral width even for a small distance between the Fabry-Perot interferometer mirrors [3,7]. Searching for new applications of this idea we present in this paper the study of Fabry-Perot interferometer with two identical waveguide grating mirrors in the case of normal incidence.…”

Section: Introductionmentioning

confidence: 93%

Influence of grating shift in Fabry-Perot interferometer with two waveguide grating mirrors

2007

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Fabry-Perot interferometer with two identical waveguide gratings mirrors is studied. Earlier we studied the case of oblique light incidence and in this paper normal incidence is considered. Normal incidence case is special because two waveguide modes propagating in the opposite directions are excited simultaneously. It is found that for the filter having small distance between the waveguide grating mirrors the reflection spectrum depends on the phase shift between the gratings. One or two additional resonances appear in the case of phase shift not being equal to 0 or π. We attribute the appearance of these resonances to the symmetry breakdown in the waveguide system and coupling between the waveguides.

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Section: Introductionmentioning

confidence: 93%

Influence of grating shift in Fabry-Perot interferometer with two waveguide grating mirrors

2007

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“…Etalon, interferometer, and grating filters [1,2,3,4] are essential elements in instrumentation, communication [5], imaging [6], sensing, spectroscopy, and laser [7] systems. The performance of these systems is greatly enhanced if the filters are tunable within a desired band.…”

Section: Introductionmentioning

confidence: 99%

Tunable LYOT-filters

Donkor¹,

Kumavor²,

Villa³

2009

Enabling Photonics Technologies for Defense, Security, and Aerospace Applications V

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An all fiber tunable Lyot filter is experimentally demonstrated. The filter can be configured for narrow band or wide band tuning. It is implemented as a Sagnac loop configuration comprised of polarization controllers, birefringent fibers, and a polarizer. Results are present for band stop tuning and narrow band tuning for the wavelengths ranging between 1500nm to 1600nm.Key words: optical band stop, Lyot filter, fiber loop mirror. I. IntroductionEtalon, interferometer, and grating filters [1,2,3,4] are essential elements in instrumentation, communication [5], imaging [6], sensing, spectroscopy, and laser [7] systems. The performance of these systems is greatly enhanced if the filters are tunable within a desired band. Birefringent filters [8,9] offer great promise for narrow band, medium band and broad band tunability because they rely on passive angle tuning for frequency selectivity. The LYOT-filter [10] is one such birefringent fiber that can be tailored for narrowband and broadband tunability. In its basic configuration it is comprised of a series arrangement of materials with identical birefringence whose thicknesses are doubled with each subsequent addition of a plate. The birefringent plates are interconnected by wavelength plates, and the input and output elements of the entire structure typically consists of polarizers. In order to compensate for the retardation induced by the birefringence adjoining plates have a relative rotation of 90 o between their axes.In this paper, we present a novel fiber-based approach to implementing a tunable LYOT filter. It is implemented in a Sagnac loop configuration as shown in figure 1. The LYOT-Sagnac loop consists of two identical sections sandwiching a linear polarizer, POL. Each section consists of a meter-long birefringent fiber (BF1, BF2), connected to the polarizer, POL. The other ends of the two birefringent fibers are connected to polarization controllers (PCI, PC2) respectively. The loop is completed by connecting the two polarization controllers to a 50:50 coupler, C.

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Phenomenological representation of deep and high contrast lamellar gratings by means of the modal method

Tishchenko

2005

Opt Quant Electron

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A narrow-band optical filter based on Fabry — Perot interferometer with one waveguide — grating mirror

Cited by 4 publications

References 1 publication

Influence of grating shift in Fabry-Perot interferometer with two waveguide grating mirrors

Influence of grating shift in Fabry-Perot interferometer with two waveguide grating mirrors

Tunable LYOT-filters

Phenomenological representation of deep and high contrast lamellar gratings by means of the modal method

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