Infrared Fiber Optics.

Harrington, James A.; Turk, R. R.; Henderson, D. M.; Standlee, A. G.

doi:10.21236/ada082450

Cited by 14 publications

(16 citation statements)

References 7 publications

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“…Currently two types of fibers have been tested in the laboratory and work sufficiently well for the FKSI mission, these are chalcogenide fibers fabricated at the Naval Research Laboratory (NRL) (Aggarwal & Sanghera 2002;Ksendzov et al 2007) that operate from the near-to mid-infrared, and silver halide fibers developed at Tel Aviv University that operate in the longer wavelength part of the mid-infrared (see Ksendzov et al 2008;Lewi et al 2008 and references therein). A third type of fiber, a hollow glass waveguide fiber developed at Rutgers University (Harrington 2001) may also be of use. Further testing is planned, including cryogenic testing of all fibers.…”

Section: Technology Progress and Technical Readiness Levelsmentioning

confidence: 99%

The Fourier-Kelvin Stellar Interferometer (FKSI): a review, progress report, and update

et al. 2008

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The Fourier-Kelvin Stellar Interferometer (FKSI) mission is a two-telescope infrared space interferometer with a 12.5 meter baseline on a boom, operating in the spectral range 3 to 8 (or 10) microns, and passively cooled to about 60 K. The main goals for the mission are the measurement and characterization of the exozodiacal emission around nearby stars, debris disks, and the atmospheres of known exoplanets, and the search for Super Earths around nearby stars. We discuss progress on this mission in the context of the upcoming Decadal Survey, in particular how FKSI is ideally suited to be an Exoplanet Probe mission in terms of crucial observations which should be done before a flagship mission can be undertaken, as well as technical readiness, cost, and risk.

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Section: Technology Progress and Technical Readiness Levelsmentioning

confidence: 99%

The Fourier-Kelvin Stellar Interferometer (FKSI): a review, progress report, and update

et al. 2008

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“…This method of functionality allows for several advantages of HGWs over solid core fibers and other types of waveguides, for example no end reflection, low insertion losses, high laser damage thresholds, and a small output beam size. [1,2] Furthermore, the ability to easily manipulate fabrication parameters allows for the convenient tailoring of HGWs to achieve a certain desired optical response. In particular, this is accomplished through the deposition of a high-quality, low surface roughness silver (Ag) thin film of desired thickness which depends on the target wavelength(s) and whether an additional dielectric layer will be subsequently implemented for that particular HGW.…”

Section: Introductionmentioning

confidence: 99%

“…[1] Traditionally, HGW have been used for the low-loss transmission of infrared radiation, primarily at λ = 2 -12 μm, due to the relatively low availability of other types of waveguides having low transmission losses at these wavelengths and the ease of manufacturing Ag/ dielectric coated HGWs for broadband transmission in this region. [1,2] However, the inherent advantages of HGWs have led to a recent drive to expand their development for use at other wavelength regions, primarily at visible and near infrared and at sub-millimeter wavelengths. The ability to fabricate such low-loss HGWs for use at visible wavelengths would allow for their use in applications requiring the delivery of high power and high energy density pulsed and CW laser radiation past the point of practical failure of silica or other types of solid core fibers.…”

Section: Introductionmentioning

confidence: 99%

Silver and silver / polystyrene coated hollow glass waveguides for the transmission of visible and infrared radiation

Bledt

Harrington

2012

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII

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This study involves the optimization of thin silver coated Hollow Glass Waveguides (HGWs) for low-loss delivery of laser radiation at visible wavelengths and discusses preliminary work in the development of polystyrene dielectric thin films in silver coated HGWs for low-loss radiation delivery at near and far infrared wavelengths. The optimization of the silver thin film deposition procedure in HGWs for reduced transmission losses at λ = 500 -1050 nm is presented along with experimental results. Such low-loss hollow waveguides are capable of delivering high power / high energy laser light with no functional damage. The benefits and use of novel polystyrene thin films in HGWs is likewise presented and preliminary experimental results are discussed along with potential applications of said polystyrene coated waveguides. Polystyrene is an attractive material for use as a dielectric thin film in HGWs due to its relatively low refractive index nearing the optimal refractive index of n = 1.414 for use as a single dielectric thin film in HGWs. Furthermore, its nontoxicity, low cost, and chemical inertness add to its beneficial use as a transparent thin film at visible and infrared wavelengths ranging from λ = 500 -3,000 nm and λ > 50 μm. Its broadband transparency additionally allows for its simultaneous use as a dielectric film in HGWs at infrared and visible wavelengths. Preliminary results in the development of polystyrene coated HGWs optimized for transmission at short and long wavelengths are presented, primarily through FTIR spectroscopic methods. The design for the optimization of deposited polystyrene thin films in HGWs based on desired transmission wavelength range is discussed.

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“…Further fiber materials have been used for measurements within other limited spectral ranges. Some fluoride glass fibers show low transmission in the wavelength interval of 0.5-5 µm, but fluoride glasses with low attenuation have also been reported [12]. For accessing a much broader spectral range, a fiber bundle of mixed zirconium fluoride and silver halide fibers was employed [13].…”

Section: Introductionmentioning

confidence: 99%

Novel infrared optical probes for process monitoring and analysis based on next-generation silver halide fibers

Heise

Küpper²,

Butvina

2003

Anal Bioanal Chem

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Mid-infrared spectroscopy has proved to be a powerful method for the study of various samples and chemical media as found in different industrial processes. In general, the analysis of such samples takes advantage of the fact that multiple analytes can be quantified simultaneously and rapidly without the need for additional reagents. When compared to near-infrared spectroscopy, for which quartz fiber probes can be successfully applied, the application of previously used mid-infrared fiber materials was restricted due to deficiencies with regard to their optical transmission and mechanical properties. Progress in the quality of infrared transparent silver halide fibers and their extrusion with different cross-sections enabled us to construct several flexible fiber-optic probes of different geometries which are particularly suitable and inert for process monitoring. Transmission and attenuated total reflection measurement techniques have mainly been employed for the analysis of liquid and gaseous media. One larger field, for which results are reported, is chemical reactor monitoring. Other applications are concerned with bio-reactor monitoring, or quasi-continuous measurements for the food industry. Infrared spectroscopic cosmetic assays for determining the chemical composition of skin-care formulations are a further promising field of application, for which an example is given.

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Infrared Fiber Optics.

Cited by 14 publications

References 7 publications

The Fourier-Kelvin Stellar Interferometer (FKSI): a review, progress report, and update

The Fourier-Kelvin Stellar Interferometer (FKSI): a review, progress report, and update

Silver and silver / polystyrene coated hollow glass waveguides for the transmission of visible and infrared radiation

Novel infrared optical probes for process monitoring and analysis based on next-generation silver halide fibers

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