A novel photonic frequency discriminator has been developed. The discriminator utilizes a Mach Zehnder interferometer-assisted ring resonator to achieve enhanced linearity. A numerical frequency-domain two-tone test is performed to evaluate the unique design of the discriminator, particularly for suppression of the third order intermodulation distortion. The discriminator is switchable between linear-intensity and linear-field regimes by adjusting a phase delay on one arm of the Mach Zehnder interferometer. Through the simulation, the linear<intensity discriminator is shown to be advantageous. The discriminator is an optical ring resonator-Mach Zehnder interferometer synthesized passive filter. The ring resonator is made of Arsenic trisulfide (As2S3) and the bus waveguide is a Titanium<diffused Lithium niobate (LiNbO3) waveguide. This As2S3 ring-on-Ti:LiNbO3 hybrid structure offers electro-optic tunability of the device owing to a strong electro-optic effect of the substrate material. A large optical confinement factor achieved by vertical integration of the As2S3 strip waveguide on a LiNbO3 substrate enables a low loss ring resonator. The Mach Zehnder interferometer is formed by the optical path length difference of the birefringent LiNbO3 substrate instead of a physical Y-branch structure, which makes the fabrication tolerances relaxed. In order for this highly birefringent device to be characterized, each polarization mode must be measured separately. A novel algorithm which can measure the wavelength-swept Jones matrix including its phase response is devised. The efficacy of the algorithm is demonstrated by characterizing a ring resonator. Finally, the fabricated discriminator is fully characterized using the algorithm.

La présente étude concerne le domaine des systèmes de transmission par fibres optiques et plus particulièrement l’impact des différentes techniques de filtrage (optiques) sur les performances des systèmes de transmission optiques (métro, accès). En réception, ces systèmes présentent un filtre étroit, qui permet de filtrer le signal sans avoir à traiter le bruit dans la liaison. On considère généralement que l'étroitesse du filtre de réception est indispensable au bon fonctionnement d'une liaison sans répéteurs, et que la sensibilité de la liaison est d'autant plus grande que la largeur du filtre est proche de la limite théorique que constitue la largeur du spectre du signal émis. L'utilisation de tels filtres présente des contraintes. D'une part, les filtres présentent des pentes raides, et sont coûteux. D'autre part, un décalage de la longueur d'onde de l'émetteur est toujours possible, de sorte que la plupart des récepteurs comprennent des filtres de réception dont la longueur d'onde est asservie sur la longueur d'onde de l'émetteur. Pour un système de transmission à multiplexage en longueurs d'onde WDM, dans lequel plusieurs longueurs d'ondes distinctes peuvent être utilisées, ceci permet d’augmenter la capacité d’information transmise, mais pose cependant de réelles contraintes telle que la diaphonie entre voies. Les canaux sont multiplexés dans la même fibre puis filtrés à la réception par un filtre optique qui sert à la fois au démultiplexage des canaux et à un éventuel filtrage optique dans le spectre du canal étudié. Le filtre optique aura des paramètres variables : forme, bande passante, et longueur d’onde centrale, ensuite le canal ainsi filtré sera analysé par le récepteur. Ce dernier comprend une photodiode suivie d’un filtre électrique de la forme de la fonction de filtrage de type de Bessel d’ordre 5. La qualité de l’information sera évaluée, par le taux d’erreur binaire TEB. Dans ce travail de thèse nous proposons une analyse de l’impact des paramètres fondamentaux des filtres sur les performances d’une liaison par la simulation système. / This study relates to the field of optical transmission systems fibers and more particularly the impact of different filtering techniques (optical) on the performance of optical transmission systems (metro access). Reception, these systems have a narrow filter, which filters the signal without having to deal with the noise in the link. It is generally considered that the narrowness of the receiving filter is indispensable for the proper functioning of a link without repeaters, and the sensitivity of the link is even greater than the width of the filter is close to the theoretical limit that is the spectrum width of the transmitted signal. The use of such filters has constraints. Firstly, the filters have steep slopes, and are expensive. On the other hand, a shift of the wavelength of the emitter length is always possible, so that most of the receivers comprise receiving filters whose wavelength is locked to the wavelength of the transmitter. For a transmission system with wavelength multiplexing, wherein plural different wavelengths may be used, this allows to increase the capacity of information transmitted, but however poses real constraints such that crosstalk between channels. The channels are multiplexed in the same fiber and filtered upon receipt by an optical filter which is used both in the channels and demultiplexing a possible optical filter in the spectrum of the considered channel. The optical filter has variable parameters: shape, bandwidth, and center wavelength, then the channel will be filtered and analyzed by the receiver. It includes a photodiode followed by an electrical filter of the form of the filter function of order Bessel type 5. Quality information will be evaluated by the bit error rate BER.In this thesis we propose to analyze the impact of the fundamental parameters of the filters on the performance of an optical system.

Le domaine des couches minces optiques a vu les fonctions de filtrage se complexifier et les techniques de dépôt se perfectionner. Cependant, certains filtres requièrent des performances ultimes notamment en termes d’uniformité et de centrage de leur réponse spectrale. Atteindre ces spécificités requiert un contrôle précis de l'épaisseur optique des couches de l’empilement. Pour se faire, l’utilisation d’un matériau dont l’indice de réfraction peut être modifié localement après dépôt est une solution. Le candidat retenu est un verre de chalcogénures : l’AMTIR-1, un verre commercial, dont l’indice de réfraction décroit sous l’action d’un champ électrique lumineux. Des couches minces de ce matériau ont été déposées par évaporation par canon à électrons et leurs propriétés optiques ont été caractérisées par mesures spectrophotométriques. Des variations d’indice photo-induites de ~4.10-2 ont été enregistrées à λ = 1 μm. Ces variations d’indice ont ensuite été exploitées pour concevoir des composants à base de couches minces optiques spatialement structurés. En particulier, des composants optiques diffractifs binaires ont été enregistrés dans le volume d’une monocouche épaisse de chalcogénure par exposition structurée. Un accord quasi parfait entre théorie et expérience a ainsi été obtenu. L’insertion de ces couches photosensibles à base de chalcogénures dans des filtres optiques interférentiels multicouches a également été investiguée. Une démonstration du contrôle local de la réponse spectrale d’un filtre passe-bande de type Fabry-Perot a été réalisée, démontrant ainsi le potentiel de cette nouvelle approche pour la réalisation de composants optiques optimisés. / In recent years, there has been a tremendous progress in the complexity of thin film optical filters but also an important improvement in the deposition techniques. However, some filters require ultimate performances especially in terms of uniformity and absolute position of their spectral responses. Achieving these characteristics requires a precise and local control of the optical thickness of each of the layers. To overcome some of these fabrication constraints, the use of a material which index of refraction or thickness can be locally changed after deposition is an attractive solution. The chosen material is a chalcogenide glass : AMTIR-1, a commercial glass which refractive index decreases when exposed to light source. Thin films of this material were deposited by electron beam deposition and optical properties were characterized by spectrophotometric measurements. Photo-induced refractive index changes of ~ 4.10-2 were recorded at λ = 1 μm. These refractive index variations were then used to fabricate spatially structured thin films. In particular, diffractive optical elements were recorded in the volume of a thick chalcogenide single layer. This is performed by structured exposure using an optical arrangement based on a digital micromirror device. A close to perfect agreement between theory and experiment has been obtained. The insertion of these chalcogenide-based photosensitive layers in multilayer optical interference filters has also been investigated. A demonstration of the local control of the spectral response of a Fabry-Perot bandpass filter was performed, demonstrating the potential of this new approach for the production of optimized optical components

Optofluidics is a relatively new and exciting field that includes the integration of optical waveguides into microfluidic platforms. The purpose of this field of study is to miniaturize previously developed optical systems used for biological and chemical analysis with the end goal of placing bench-top optics into microscopic packages. Mundane optical alignment and sample manipulation procedures would then be intrinsic to the platform and allow measurements to be completed quickly and with reduced human interaction. Biosensors based on AntiResonant Reflecting Optical Waveguides (ARROWs) consist of hollow-core waveguides used for fluid sample manipulation and analysis, as well as solid-core waveguides used in interfacing external components located at the chip edges. Hollow-core ARROWs are particularly useful for their ability to provide specifically tailored analyte volumes that are easily configurable depending upon the target experiment. Adaptations of standard planar microfabrication methods allow for complex integrated ARROW designs. Integrated spectral filtering with high rejection can be implemented on-chip, removing the need for additional off-chip components and increasing device sensitivity. Additional techniques to increase device sensitivity and utility, such as hybrid ARROW platforms and optical manipulation of samples, are also explored.

Les travaux de cette thèse concernent l'étude de l'influence des conditions de dépôt sur la microstructure et les propriétés optiques de monocouches dans le but de réaliser des filtres optiques particuliers commercialisables. La méthode de dépôt utilisée est l'évaporation par canon à électrons avec assistance ionique. L'un des deux projets a été de vérifier la faisabilité de filtres optiques infrarouges dans la gamme [2-15] µm avec des matériaux non toxiques. Les monocouches des trois fluorures étudiées ont montré des comportements différents suivant les conditions de dépôt, notamment suivant la température du substrat qui influe fortement sur leur microstructure. L'association du BaF₂ au germanium, avec des réglages optimisés, montre pour différents filtres réalisés des résultats proches de la théorie. Ces filtres sont donc commercialisables. Le second projet a été de développer une machine de dépôt dans le but de pouvoir réaliser des filtres complexes d'une centaine de couches d'épaisseur variable (de 15 à 300 nm) associant des monocouches de TiO₂ à des monocouches de SiO₂. L'étude de l'influence des paramètres de dépôts (pression, assistance ionique, préchauffage du matériau) au travers différentes caractérisations (MEB, AFM, ellipsométrie)  a permis une optimisation des réglages de l'enceinte de dépôt plus efficace et adaptée en fonction des spécifications des filtres optiques à réaliser. Puis, une étude ellipsométrique poussée de l'indice de réfraction des monocouches de TiO₂ en fonction de leur épaisseur a conduit à une nette évolution des résultats pour la réalisation du filtre complexe. / This thesis deals the study of deposition conditions 'effect on the microstructure and optical properties of monolayers in order to achieve marketable optical filters, with particular specifications. All filters and monolayers were deposited by ion-assisted electron-beam evaporation technique. One of the two projects was to test the feasibility of infrared optical filters in the range [2-15] µm with non-toxic materials. The study of monolayers of three fluorides showed different behaviors depending on the deposition conditions especially as a function of the substrate temperature that affects their microstructure. For different filters realized, the association of BaF₂ with germanium, settings of deposition optimized, shows results close to the theory and these filters are marketable. The second project was to develop a deposition chamber in order to realize complex filters built with one hundred layers of variable thickness (15 to 300 nm) associating monolayers of TiO₂ with monolayers of SiO₂. The study of the influence of deposition parameters (pressure, ionic assistance, preheating of material) through different characterizations (SEM, AFM, ellipsometry) allowed the optimization of deposition's parameter settings more effective, and adapted according to the specifications of the optical filters to realize. Then, an ellipsometric advanced study of the refractive index of TiO₂ monolayers depending on their thickness led to a significant change in results for the realization of complex filter.

Die chromatische Dispersion ist in optischen Übertragungssystemen mit Datenraten von 10 Gbit/s und darüber einer der Faktoren, der die Länge der Übertragungsstrecke limitiert. Der Hauptteil der chromatischen Dispersion wird in solchen Übertragungssystemen in der Regel durch Dispersionskompensationsfasern ausgeglichen. Aufgrund von z.B. Umwelteinflüssen kann allerdings auch eine sich zeitlich ändernde Dispersion auftreten. Zur Eliminierung dieser Restdispersion wurden unterschiedliche Ansätze wie abstimmbare Faser-Bragg-Gitter, Virtually-Imaged-Phased-Arrays und Delay-Line-Filter publiziert. Delay-Line-Filter, deren periodisches Übertragungsverhalten durch die Filterkoeffizienten bestimmt wird, wurden bereits als Ring-Resonatoren und kaskadierte Mach-Zehnder-Interferometer in integriert-optischer Technologie hergestellt. Integriert-optische Komponenten verursachen aufgrund der Ankopplung an die Fasern des Übertragungssystems hohe Einfügeverluste. Darüber hinaus treten hohe Wellenleiterverluste, polarisationsabhängige Verluste und Polarisationsmodendispersion auf. Daher wird in dieser Arbeit die Realisierung faseroptischer Delay-Line-Filter, die auf faseroptischen Schmelzkopplern und faseroptischen Gewichtungselementen basieren, untersucht. Aufgrund der geometrischen Längen der faseroptischen Schmelzkoppler und der Größe der Gewichtungselemente können solche Filter allerdings nur mit einer geringen Filterordnung und mit einer geringen Anzahl von Gewichtungselementen hergestellt werden. Um mit Filtern niedriger Ordnung eine möglichst effektive Kompensation der Restdispersion zu erzielen, ist zunächst eine sorgfältige Untersuchung der Filtereigenschaften und des Filterentwurfs erforderlich. Durch systematische Untersuchung des Verhaltens der Filterdispersion in Abhängigkeit der Filterkoeffizienten wurden in dieser Arbeit hierzu erstmalig einfache Entwurfsregeln aufgestellt, die für Filter beliebiger Filterordnung zu annähernd konstantem Dispersionsverlauf führen. Auf dieser Grundlage konnte ein faseroptisches Delay-Line-Filter realisiert werden, das auf zwei in Reihe geschalteten faseroptischen 3x3 Schmelzkopplern basiert. Die Dispersion dieses Filters ist in einem Bereich von 50 GHz um die Mitte einer Filterperiode herum annähernd konstant und kann in einem Bereich von +/-50 ps/nm durch ein einzelnes thermisches Gewichtungselement abgestimmt werden. Aufgrund der faseroptischen Realisierung kann die Komponente problemlos in optische Übertragungsstrecken integriert werden und verursacht dabei Einfügeverluste von lediglich 3 dB. In Übertragungsexperimenten bei Datenraten von 42,5 Gbit/s konnte gezeigt werden, dass das Filter in der Lage ist die Dispersionstoleranz des Systems annähernd zu verdoppeln. Dies gilt sowohl für die Kompensation eines einzelnen Kanals als auch für die simultane Kompensation mehrerer benachbarter Übertragungskanäle mit je 42,5 Gbit/s. / Chromatic dispersion is a limiting factor in fast optical networks with channel bit rates of 10 Gbit/s or higher. The main part of the dispersion is usually compensated by spans of dispersion compensating fiber that have a fixed dispersion value. But the residual dispersion caused by environmental changes or rerouting has to be compensated adaptively. To overcome the effects of residual dispersion several approaches like tunable fiber Bragg gratings, virtually imaged phased arrays and delay line filters can be found in literature. The use of delay line filters like cascaded ring-resonators, multi-cavity etalons and cascaded Mach-Zehnder interferometers, whose periodic transfer behavior is determined by their coefficients, have already been developed in planar-optics. These components cause insertion loss due to the coupling to the fibers. Furthermore they suffer from high waveguide loss, non-negligible polarization dependent loss and polarization mode dispersion. In this thesis the realization of tunable delay line filters based on fiberoptic couplers and fiberoptic weighting elements is investigated. Due to the size of these components the filters can be realized with a limited order and a limited number of weighting elements, only. To fulfill these requirements a careful investigation of the filter design is necessary. By systematically investigating the dispersion of the filter depending on the filter coefficients simple design rules for non-recursive delay line filters with approximately constant dispersion are figured out. That enables the realization of a fiberoptic delay line filter, based on two 3x3 couplers concatenated in series. The dispersion of this filter is constant in a bandwidth of about 50 GHz around the center of a period and can be tuned in a range of +/-50 ps/nm by changing one single weighting element. Due to its nature this device causes low loss and can be easily integrated in an optical transmission system. In experiments it was demonstrated that by adding this filter to a 42.5 Gb/s transmission system the +/- 55 ps/nm dispersion tolerance of the optical receiver can almost be doubled - either in a single channel as well as in a multi channel configuration with five adjacent 42.5 Gb/s channels.

Die chromatische Dispersion ist in optischen Übertragungssystemen mit Datenraten von 10 Gbit/s und darüber einer der Faktoren, der die Länge der Übertragungsstrecke limitiert. Der Hauptteil der chromatischen Dispersion wird in solchen Übertragungssystemen in der Regel durch Dispersionskompensationsfasern ausgeglichen. Aufgrund von z.B. Umwelteinflüssen kann allerdings auch eine sich zeitlich ändernde Dispersion auftreten. Zur Eliminierung dieser Restdispersion wurden unterschiedliche Ansätze wie abstimmbare Faser-Bragg-Gitter, Virtually-Imaged-Phased-Arrays und Delay-Line-Filter publiziert. Delay-Line-Filter, deren periodisches Übertragungsverhalten durch die Filterkoeffizienten bestimmt wird, wurden bereits als Ring-Resonatoren und kaskadierte Mach-Zehnder-Interferometer in integriert-optischer Technologie hergestellt. Integriert-optische Komponenten verursachen aufgrund der Ankopplung an die Fasern des Übertragungssystems hohe Einfügeverluste. Darüber hinaus treten hohe Wellenleiterverluste, polarisationsabhängige Verluste und Polarisationsmodendispersion auf. Daher wird in dieser Arbeit die Realisierung faseroptischer Delay-Line-Filter, die auf faseroptischen Schmelzkopplern und faseroptischen Gewichtungselementen basieren, untersucht. Aufgrund der geometrischen Längen der faseroptischen Schmelzkoppler und der Größe der Gewichtungselemente können solche Filter allerdings nur mit einer geringen Filterordnung und mit einer geringen Anzahl von Gewichtungselementen hergestellt werden. Um mit Filtern niedriger Ordnung eine möglichst effektive Kompensation der Restdispersion zu erzielen, ist zunächst eine sorgfältige Untersuchung der Filtereigenschaften und des Filterentwurfs erforderlich. Durch systematische Untersuchung des Verhaltens der Filterdispersion in Abhängigkeit der Filterkoeffizienten wurden in dieser Arbeit hierzu erstmalig einfache Entwurfsregeln aufgestellt, die für Filter beliebiger Filterordnung zu annähernd konstantem Dispersionsverlauf führen. Auf dieser Grundlage konnte ein faseroptisches Delay-Line-Filter realisiert werden, das auf zwei in Reihe geschalteten faseroptischen 3x3 Schmelzkopplern basiert. Die Dispersion dieses Filters ist in einem Bereich von 50 GHz um die Mitte einer Filterperiode herum annähernd konstant und kann in einem Bereich von +/-50 ps/nm durch ein einzelnes thermisches Gewichtungselement abgestimmt werden. Aufgrund der faseroptischen Realisierung kann die Komponente problemlos in optische Übertragungsstrecken integriert werden und verursacht dabei Einfügeverluste von lediglich 3 dB. In Übertragungsexperimenten bei Datenraten von 42,5 Gbit/s konnte gezeigt werden, dass das Filter in der Lage ist die Dispersionstoleranz des Systems annähernd zu verdoppeln. Dies gilt sowohl für die Kompensation eines einzelnen Kanals als auch für die simultane Kompensation mehrerer benachbarter Übertragungskanäle mit je 42,5 Gbit/s. / Chromatic dispersion is a limiting factor in fast optical networks with channel bit rates of 10 Gbit/s or higher. The main part of the dispersion is usually compensated by spans of dispersion compensating fiber that have a fixed dispersion value. But the residual dispersion caused by environmental changes or rerouting has to be compensated adaptively. To overcome the effects of residual dispersion several approaches like tunable fiber Bragg gratings, virtually imaged phased arrays and delay line filters can be found in literature. The use of delay line filters like cascaded ring-resonators, multi-cavity etalons and cascaded Mach-Zehnder interferometers, whose periodic transfer behavior is determined by their coefficients, have already been developed in planar-optics. These components cause insertion loss due to the coupling to the fibers. Furthermore they suffer from high waveguide loss, non-negligible polarization dependent loss and polarization mode dispersion. In this thesis the realization of tunable delay line filters based on fiberoptic couplers and fiberoptic weighting elements is investigated. Due to the size of these components the filters can be realized with a limited order and a limited number of weighting elements, only. To fulfill these requirements a careful investigation of the filter design is necessary. By systematically investigating the dispersion of the filter depending on the filter coefficients simple design rules for non-recursive delay line filters with approximately constant dispersion are figured out. That enables the realization of a fiberoptic delay line filter, based on two 3x3 couplers concatenated in series. The dispersion of this filter is constant in a bandwidth of about 50 GHz around the center of a period and can be tuned in a range of +/-50 ps/nm by changing one single weighting element. Due to its nature this device causes low loss and can be easily integrated in an optical transmission system. In experiments it was demonstrated that by adding this filter to a 42.5 Gb/s transmission system the +/- 55 ps/nm dispersion tolerance of the optical receiver can almost be doubled - either in a single channel as well as in a multi channel configuration with five adjacent 42.5 Gb/s channels.

High Spectral Resolution Lidar (HSRL) is a backscatter lidar technique that employs an optical/spectral filter to distinguish between particulate (Mie) and molecular (Rayleigh) backscattered light. By separating the two types of returns, higher accuracy measurements are possible that will enable improved climate models, air quality measurements, and climate forecasting. A spaceborne HSRL instrument can provide great impact in these areas by enabling near-continuous measurements across the Earth, however the optical filter technology has typically been too complex for reliable long-duration space flight due to the need for complicated and costly electro-optic feedback loops, extra alignment detectors, and additional laser sources. Furthermore, these complexities limit the filter from use in other applications. In this research, a high-performance, ultra-narrowband interferometric optical filter with a specific thermo-optical behavior has been designed and built. The interferometer has been designed such that it can be reliably adjusted/tuned by simply monitoring and adjusting the temperature. The greatly reduced operational complexity was made possible through high-accuracy thermal characterization of the interferometer materials, combined with detailed Structural-Thermal-Optical-Performance (STOP) modeling to capture the complicated interactions between the materials. The overall design process, fabrication procedures, and characterization of the optical filter are presented. / Doctor of Philosophy / LiDAR (an acronym for Light Detection and Ranging) is a technology that can be used to measure properties of the atmosphere. It is similar to radar, but uses much smaller light waves rather than larger radio waves, enabling more detailed information to be obtained. High Spectral Resolution Lidar (HSRL) is a lidar technique that uses a high precision optical filter to distinguish between light that scatters from particulates (such as dust, smoke, or fog) and light that scatters from molecules (such as oxygen, nitrogen, or carbon dioxide) in the atmosphere. By separating the two types of backscattered light, higher accuracy measurements are possible that will enable improvements in climate models, air quality measurements, and climate forecasting. A spaceborne HSRL instrument can provide great impact in these areas by enabling near-continuous measurements across the Earth; however, the optical filter technology has typically been too complex for reliable long-duration spaceflight due to the need for complicated and expensive additional hardware. In this research, a high-performance HSRL optical filter that can be reliably operated by simply monitoring and adjusting the temperature has been designed, built, and tested. The greatly-reduced operational complexity has been made possible through a new process that enables more accurate prediction of the complicated interactions between the materials of the optical filter. This process is based on a combination of high-accuracy characterization of the materials and detailed structural-thermal-optical-performance (STOP) modeling. The overall design process, fabrication procedures, and characterization of the optical filter are presented.

This thesis describes the principles of making application which is able to set and control camera. The first part describes basic camera connections and it explains definition and specification of camera’s features. The second part of my thesis describes implementation of application, which can use more cameras to image preview, image acquisition and to simply set of camera’s features. To implement the applications we can use MATLAB and C++BUILDER uses opencv libraries.

Les filtres spectraux à réseaux résonants, ou GMRF (Guided-Mode Resonance Filters), sont une nouvelle génération de filtres à bande étroite et constituent une alternative très prometteuse aux filtres conventionnels multicouches Fabry-Pérot. Le pic de résonance d'un GMRF peut être très fin spectralement et de longueur d'onde de centrage accordable en fonction de l'angle d'incidence. Ces propriétés sont particulièrement importantes pour la spectroscopie. Les travaux antérieurs ont permis de mettre en œuvre une structure originale comportant deux réseaux 1D croisés. Les performances de ce filtre surpassent celles des filtres conventionnels par leur réponse spectrale subnanométrique, leur accordabilité, et leur capacité à s'affranchir de l'influence de la polarisation de l'onde incidente sous incidence oblique. Le but de ce travail est d'explorer les performances ultimes de ce type de dispositif en termes de résolution et taux de réjection, par une approche mêlant théorie, technologie et caractérisation. Nous présentons des résultats expérimentaux d'un filtre en réflexion indépendant de la polarisation, accordable sur 40 nm avec 8.3nm/° d'accordabilité, ayant une réflexion de 10-3 sur une plage de 90nm en dehors de la résonance et un facteur de qualité supérieur à 5000. / Guided Mode Resonance Filters ( GMRF ) are a new generation of narrowband optical filters and are a very promising alternative to conventional multilayer Fabry-Perot filters. The resonance peak of GMRF can be spectrally extremely thin and with a centering wavelength tunable according to the angle of incidence of the light. These properties are particularly important for spectroscopy. Previous works have helped to implement an original structure with two 1D crossed gratings. The performance of this filter overpasses those of conventional filters in their spectral subnanometric response, tunability and their ability to overcome the influence of the polarization of the incident wave under oblique incidence. The aim of this work is to explore the final performances of such devices in terms of resolution and rejection rate, thanks to an approach combining theory, fabrication technology and characterization. We present experimental results of a polarization independent reflective filter, tunable over 40nm with a tunability of 8.3nm / °, having a reflection of 10-3 on a 90nm range outside the resonance and a quality factor over 5000.