New IR detectors pig-tailed with IR fibers

Artiouchenko, Viatcheslav G.; Chekanova, Galina V.; Lartsev, Ivan Yu.; Lobachev, V. A.; Nikitine, Mikhail S.

doi:10.1117/12.499591

Cited by 2 publications

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“…Variety of IR materials and fibers were developed transmitting CO and CO 2 laser irradiation [1,2] with the typical necessary length is about 2-3 meters. The fibers for this spectral range are presented by the next types as heavy metal fluoride glass (HMFG), or the polycrystalline (AgBrCl) fibers, also the hollow rectangular waveguides are developing for infrared irradiation transmission.…”

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Mid-infrared fibers: variants for mode filtration for the single-mode operation

Tulaikova

Kravtsov

2004

Infrared Spaceborne Remote Sensing XII

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In presented paper the analytical method of the complex analysis for PIR fiber-optic depending on number of optical modes was applied with numeral estimations. In this paper the consideration of polycrystalline-fiber materials (ArBrCl) for the wavelengths 4-20µm were performed with real appropriate numeral estimations. The physical nature of imaginary part of refractive indexes was assumed as the total sum of material scattering with material absorption. The simple equations were received and used for calculations of the imaginary parts of these main functions as well as for the set of mode's attenuations (α m ) from the imaginary parts of propagation constants. Using designed in given paper algorithm, the analysis of the operation of surrounding water was organized for effective desirable absorption of the set of optical cladding's modes. I. INTRIDUCTIONThe single-mode operation of PIR fiber will increase considerably the number of possible PIR elements and devices by principle copies from the standard rage of quarts communication lines into more vide infrared spectral rage. Development of Polycrystalline Infrared (PIR-) fibers extruded from solid solutions of AgCl/AgBr has opened a new horizon of molecular spectroscopy applications in 4-18 micron range of spectra. PIR-fibers are successfully used as environment or medical sensors. By optimization of this core/cladding parameters the single-mode operation of PIR fiber could be achieved as desirable result for the sensitivity improvement. The quartz optical fiber was developed very well, so the optical communication lines with different appropriate control elements could be imitated in new infrared range by this method of PIR-fiber improvement. So, this fact could increase the possibility of optical fibers for additional 'thermal' spectral region. For example, high-sensitive diffraction gratings could be easily produced in photo-sensitive material of ArClBr fiber to get as fiber spectral filters as another new interesting elements in more wide spectrum. These fiber gratings could be created as periodical changing of refractive index in the fiber core or in the whole structure in the case then the only fundamental mode could be localized into the core area. These sensors will have high environment sensitivity under an external influence.

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