Integrated-optical three-colour-mixing device

Ruske, J.-P.; Rottschalk, M.; Zeitner, B.; Gröber, V.; Rasch, A.

doi:10.1049/el:19980292

Cited by 8 publications

(2 citation statements)

References 6 publications

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“…That is, Á is changeable by but not limited to the filling factor. Thus, the CCGF can be applied to select two specified channels from incident light according to tailoring the grating parameters, and polarization-insensitive two-color mixing applications may be exploited [33]. Moreover, if our design makes one reflection peak falls out the visible wavelength band and, thus, outside the human perception zone, polarization-insensitive color filtering applications of CCGF may also be realized.…”

Section: Measured Resultsmentioning

confidence: 99%

Polarization-Insensitive Concentric Circular Grating Filters Featuring a Couple of Resonant Peaks

et al. 2015

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We demonstrate here guided mode resonance (GMR) concentric circular grating filters (CCGFs) on an HfO 2 -on-silicon platform. The fabricated devices are realized with a membrane structure by completely removing the silicon substrate beneath the HfO 2 device layer and, thus, can operate across the entire visible wavelength band. Polarization-insensitive properties under normal incidence are experimentally achieved resulting from their rotational symmetry. Substantially differing from 1-D linear grating filters, CCGFs typically feature a couple of resonant peaks for normal incident arbitrary linear polarization, which, from a local point of view, can be physically attributed to the coexistence of azimuthal and radial components of the incident light electric field. The CCGFs here have potential applications, such as polarization-insensitive two-color mixing devices and polarization-insensitive color filtering devices.

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Section: Measured Resultsmentioning

confidence: 99%

Polarization-Insensitive Concentric Circular Grating Filters Featuring a Couple of Resonant Peaks

et al. 2015

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“…The (i) theoretical modelling and experimental verification of waveguides in single-and multimode technique with respect to operation ranges and guiding parameters for application in beam combination, beam splitting and modulation (Rottschalk et al , 1997, the (ii) concept of integratedoptical modulators for colour image generation with laser light in form of a power proofed and broadband solution (Ruske et al 1995a) and (iii) the fabrication of demonstrators for colour image generation systems (Ruske et al 1998) have been focal points in these projects. Interferometric modulators with contrast ratio of about 500:1 in the visible and 5000:1 in the infrared for modulation frequency of more than some 100 MHz and guided optical power up to 100 mW have been realized in reproducible way.…”

Section: Technology: Integrated Opticsmentioning

confidence: 99%

Near-Infrared Fiber Imager for the VLTI

Neuhäuser¹,

Tünnermann²,

Hempel³

et al.

The Power of Optical/Ir Interferometry: Recent Scientific Results and 2nd Generation Instrumentation

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Abstract.For detection of massive close-in exo-planets around other stars, a contrast of ∼ 0.3% is sufficient and can be achieved with state-of-the-art single-mode fibers as spatial filter. For lower-mass planets, much higher accuracy is neccessary. Apart from the atmosphere, there are several sources of noise which degrade the phase stability of interferometers based on bulk optics by changes in the optical path. For direct detection of low-mass exo-planets and for direct observation of convection on giant stars, our two main science goals, as well as for secondary science goals such as lower-mass faint circumstellar disks around both nearby low-mass stars as well as more distant high-mass stars and for the direct detection of close spectroscopic binary (T Tauri) stars and to follow their orbits for direct dynamical mass determination, we need more than two apertures to fill the uv-plane, again very complicated with bulk-optics. Integrated optics allows to solve these problems and to minimize the components. We have experiences in the development and fabrication of integrated-optical circuits and modulators in various wavelength ranges, i.e. from visible to the telecommunication band, as well as integrated-optical sensor systems like interferometers. Starting from two channel interferometers for the J-band at 1.55µm based on Lithiumniobat, we will develop multichannel-interferometer systems for longer wavelengths. Such systems with new materials and fibers for the near-and thermal infrared can then be used, e.g., for 2nd Gen VLTI instrumentation.

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