Hollow-core oxide-glass cladding optical fibers for middle-infrared region

Hidaka, Takehiko; Morikawa, Takayuki; Shimada, Junichi

doi:10.1063/1.329373

Cited by 64 publications

(18 citation statements)

References 5 publications

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“…68 -70 The use of dielectric materials such as silica or sapphire, which exhibit strong absorption in the MIR, enables low-loss waveguide transmission measurements around the wavelengths of strong absorption. 71,72 In these regions, the reflectivity of the wall is high because its refractive index becomes less than unity and it acts as an internal reflection light-guide. Based on hollow waveguides acting as capillary flow cells, direct gas sensing applications with special emphasis on fast response times and small sample volumes for various environmentally and industrially relevant gases, including hydrocarbons and halogenated hydrocarbons, have been reported.…”

Section: Hollow Waveguide Based Direct Sensorsmentioning

confidence: 99%

Sensor Systems Based on Mid‐Infrared Transparent Fibers

Mizaikoff

Lendl

2001

Handbook of Vibrational Spectroscopy

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The sections in this article are Introduction Some Basic Remarks on Optical Sensor Systems Brief History Basic Sensing Principle Sensing Schemes MIR Sensors Based on Direct Analyte Interaction Chalcogenide Fiber Based Direct Sensors Fluoride Fiber Based Direct Sensors Sapphire Fiber Based Direct Sensors Tellurium Halide Fiber Based Direct Sensors Silver Halide Fiber Based Direct Sensors Hollow Waveguide Based Direct Sensors Chemical MIR Sensors and Complex Matrices Biological/Biochemical Applications Medical Applications Environmental/Process Applications Mid‐Infrared Sensors Combined with Flow Injection Analysis Determination of Enzyme Activities Determination of Phosphate in Dietary Soft Drinks Automated Solvent Exchange During the Determination of Caffeine in Soft Drinks Future Perspectives Conclusion

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Section: Hollow Waveguide Based Direct Sensorsmentioning

confidence: 99%

Sensor Systems Based on Mid‐Infrared Transparent Fibers

Mizaikoff

Lendl

2001

Handbook of Vibrational Spectroscopy

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“…The structural parameters of fibers are as follows: r co =1100 μm, n 1 =1, n 2 =1.52 (PE), d 2 =1.2 μm, d 1 =24 μm and N=3 (fiber A). The absorption coefficient (α) of PE is about 50 cm −1 (corresponding to 2.17 7 10 × dB/km) at 10 μm wavelength [30] . Numerically simulated results show that the losses of TE 01 mode for fiber A are below 23.5 dB/km in the wavelength range of 2.9 to 10 μm.…”

Section: Pofs For Ir Regionmentioning

confidence: 99%

A new generation of plastic optical fibers and its functional exploiting

Zhang

2008

Sci. China Ser. E-Technol. Sci.

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A major problem of plastic optical fibers (POFs) is large transmission loss in comparison with silica fibers. After adopting a new optical fiber structure, hollow-core Bragg fiber with cobweb-structured cladding, which can suppress the absorption losses of constituent materials by a factor of about 10 4 -10 6 , the problem of POFs with large losses is solved ultimately. With the advantage of flexibility and easy bending, the POFs with this structure can guide light with low transmission loss for information and energy in the wavelength range of visible light to terahertz (THz) wave (0.4-1000 μm). This new generation of POFs will find many applications.plastic optical fiber, hollow-core Bragg fiber, cobweb-structured cladding, visible light, infrared light, terahertz wave, circular-polarization single-mode At the beginning of the 19th century, transmission light by total internal reflection (TIR) was known [1] . Therefore, transmission light using the refractive index of fiber core material larger than that of cladding material and so forming TIR on boundary surface between fiber core and cladding has a long history and deep physical connotation. All of the solid-core fibers, including solid-core fibers with microstructured cladding, liquid-core fibers, and a part of infrared (IR) hollow-core fibers, transmit light through the mechanism of TIR. In addition, the light can effectively be confined to fiber core by the mechanism. For example, after silica fiber to be made from the purified material, as pointed out by Kao et al. in 1966, the losses of more than 1000 dB/km for silica fiber by TIR are quickly reduced to 20 dB/km, then to about 0.2 dB/km-approaching to the theoretical limit. In fact, another mechanism of transmission light was proposed as early as 1978 [2] , namely using Bragg reflection in a cylindrical fiber to obtain lossless confined propagation in a core with a lower refractive index than that of the cladding medium. After several years, it was found that the original design of Bragg fibers offered no possibility of low-loss propagation [3] . Then, few people attended to it until the late 1990s when the hollow-core Bragg fibers [4] and hollow-core photonic band gap fibers [5] were demonstrated experimentally for the first time.

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“…14 The Pb glass and germanate glass ATRHW samples (nominal bore size about 1 mm) prepared by Hidaka and Worrell had measured losses and calculated losses of 2-7.7 dB/m and 0.1-0.9 dB/m at 10.6 lm, respectively. 6,12,14 The high measured loss is considered to mainly arise from large dimensional changes in the Pb glass and germanate glass tubes (the variation is 20-70% of the nominal bore size). Silica glass can be drawn into capillary tubes more easily than Pb glass and germanate glass.…”

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confidence: 99%

Attenuated total reflection GeO2 hollow waveguide for 9.6–11.7 μm infrared light transmission

Chen

Zhang

et al. 2011

Applied Physics Letters

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We report the preparation and characterization of an attenuated total reflection (ATR) GeO2 hollow waveguide. An internally GeO2-coated silica glass tube (bore size 1.0–1.2 mm, length 1.2 m) was prepared using a homogeneous liquid phase deposition method. Kramers-Kronig analysis reveals that the GeO2 cladding material qualifies as a reflective layer (nr < 1) for the ATR hollow waveguide structure. ATR-transmission of 9.6–11.7 μm light through HE11 mode is confirmed by loss spectrum analysis of the sample. The straight and bending (30°) transmission losses for delivery of a ∼40 W CO2 laser beam (10.6 μm) are 0.56 dB/m and 1.64 dB/m, respectively.

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Hollow-core oxide-glass cladding optical fibers for middle-infrared region

Cited by 64 publications

References 5 publications

Sensor Systems Based on Mid‐Infrared Transparent Fibers

Sensor Systems Based on Mid‐Infrared Transparent Fibers

A new generation of plastic optical fibers and its functional exploiting

Attenuated total reflection GeO2 hollow waveguide for 9.6–11.7 μm infrared light transmission

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