Single mode mid-infrared silver halide asymmetric flat waveguide obtained from crystal extrusion

Grille, Romain; Martín, G.; Labadie, Lucas; Arezki, B.; Kern, P.; Lewi, Tomer; Tsun, A.; Katzir, Abraham

doi:10.1364/oe.17.012516

Cited by 20 publications

(14 citation statements)

References 11 publications

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“…Integrated optics that operate in the mid-infrared (mid-IR) region of the electromagnetic spectrum (3-25 µm) are attracting a considerable amount of research interest due to the potential applications in remote gas sensors [1], biosensors [2] and stellar interferometry [3]. Materials such as zinc selenide [4], silver halide [5], tellurium halides [6] and chalcogenide glasses [7] are suitable host materials for such devices due to their excellent mid-IR transparency.…”

Section: Introductionmentioning

confidence: 99%

Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide

McCarthy¹,

Bookey²,

Psaila³

et al. 2012

Opt. Express

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Section: Introductionmentioning

confidence: 99%

Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide

McCarthy¹,

Bookey²,

Psaila³

et al. 2012

Opt. Express

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“…The principle of this method is based on the idea that the energy coupled into the waveguide at a given wavelength is distributed among the different propagation modes supported by the waveguide. As the wavelength varies from shorter to longer values, the number of supported modes decreases by one at each cutoff wavelength, and this can be traced in a transmission spectrum by identifying an abrupt dip in the guided flux intensity (Grille et al 2009). This technique was used here to characterize the modal behavior of the channel waveguides visible in Fig.…”

Section: Spectroscopic Characterization Of the Modal Behaviormentioning

confidence: 99%

First fringes with an integrated-optics beam combiner at 10 μm

Labadie

Martín

Anheier

et al. 2011

A&A

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Context. Observations of milliarcsecond-resolution scales and high dynamic range hold a central place in the exploration of distant planetary systems in order to achieve, for instance, the spectroscopic characterization of exo-Earths or the detailed mapping of their protoplanetary disc birthplace. Multi-aperture infrared interferometry, either from the ground or from space, is a very powerful technique to tackle these goals. However, significant technical efforts still need to be undertaken to achieve a simplification of these instruments if we wish to recombine the light from a large number of telescopes. Integrated-optics concepts appear to be a suitable alternative to the current conventional designs, especially if their use can be extended to a higher number of astronomical bands. Aims. This article reports, for the first time to our knowledge, the experimental demonstration of the feasibility of an integrated-optics approach to mid-infrared beam combination for single-mode stellar interferometry. Methods. We fabricated a two-telescope beam combiner prototype integrated on a substrate of chalcogenide glass, a material transparent from ∼1 μm to ∼14 μm. We developed laboratory tools to characterize in the mid-infrared the modal properties and the interferometric capabilities of our device. Results. We obtain interferometric fringes at 10 μm and measure a mean contrast V = 0.981 ± 0.001 with high repeatability over one week and high stability over a time-period of ∼5 h. We show experimentally -as well as on the basis of modeling considerationsthat the component has a single-mode behavior at this wavelength, which is essential to achieve high-accuracy interferometry. From previous studies, the propagation losses are estimated to be 0.5 dB/cm for this type of component. We also discuss possible issues that may impact the interferometric contrast. Conclusions. The IO beam combiner performs well at the tested wavelength. We also anticipate the requirement of a closer matching between the numerical apertures of the component and the (de)coupling optics to optimize the total throughput. The next step foreseen is the achievement of wide-band interferograms.

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“…There are many works dedicated to the development of the single-mode PCFs for middle and far infrared [1][2][3][4]. Fibers used in these works are made of crystals of silver chloride-bromide solid solutions, which are now almost the only material suitable for extrusion of flexible non-toxic and nonhygroscopic polycrystalline fibers for IR radiation transmission in 2-30 μm range [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Photonic crystalline IR fibers for the spectral range of 2–40 μm

et al. 2012

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Monocrystals of Ag(1-x)Tl(x)Br(1-x)I(x) and Ag(1-x)Tl(x)Cl(y)I(z)Br(1-y-z) for the spectral range from 2.0 to 40.0 μm with improved photostability were developed and grown. The grown crystals were used for fabrication of single-mode IR fibers. Experimental studies of optical properties of these fibers have confirmed their single-mode operation at CO2 laser wavelength and demonstrated wider mode field for microstructured fiber compared to fibers with conventional double-layered structure.

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Single mode mid-infrared silver halide asymmetric flat waveguide obtained from crystal extrusion

Cited by 20 publications

References 11 publications

Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide

Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide

First fringes with an integrated-optics beam combiner at 10 μm

Photonic crystalline IR fibers for the spectral range of 2–40 μm

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