Optical properties of small-bore hollow glass waveguides

Matsuura, Yuji; Abel, Todd; Harrington, James A.

doi:10.1364/ao.34.006842

Cited by 107 publications

(45 citation statements)

References 18 publications

(26 reference statements)

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“…beyond 1.0 mm may raise the average delivered power but at the same time distorts the beam profile from the regular Gaussian shape. Similar results were obtained by Matsuura et al 21,22 In addition there are other factors that may have an influence on the beam shape delivered by a hollow flexible waveguide.…”

Section: Resultssupporting

confidence: 85%

Theoretical model and experimental studies of infrared radiation propagation in hollow plastic and glass waveguides

et al. 2000

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Results on scattering, off-center coupling, and other losses that influence the shape of a beam delivered by flexible hollow waveguides are presented. The conditions for the beam shape to be near to that of the source are found. A theoretical model for the radiation propagation through the hollow waveguides and the conditions for change in the beam shape are calculated. Good agreement between the theoretical and experimental results was obtained.

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Section: Resultssupporting

confidence: 85%

Theoretical model and experimental studies of infrared radiation propagation in hollow plastic and glass waveguides

et al. 2000

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“…The first 50 cm of the fiber was kept straight and the rest was bent into uniform radii. As previously reported, 12 the loss proportionally increases with the curvature, and at a curvature of 6.7, where the fiber is bent 180 deg, the additional loss was 2.55 dB∕m. Figure 5 also shows the maximum SNRs as a function of curvature.…”

Section: Optical Engineeringsupporting

confidence: 82%

Design and optimization of hollow-optical-fiber gas cell for infrared spectroscopy

et al. 2013

Self Cite

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Abstract. We optimized the configuration of a hollow-fiber gas cell used in a Fourier-transform infrared spectroscopy system for quantitative analyses of low-concentration gas components with small sample volume. Numerical calculation shows that the signal-to-noise ratio (SNR) of this measurement system is maximized in a condition dependent on a fiber's bore size and length, transmission loss of the fiber, and absorption coefficient of the objective gas component. From the design calculation, a hollow optical fiber with a large diameter of 2 mm was chosen, and a measurement system was constructed with the fiber. In analyses of measured absorption spectra, evaluation of the total area of multiple peaks with different rotation levels enables precise evaluation of gas components with high SNR. Experimental results with sample gases containing nitric oxide showed that a minimum detection limit <1 ppm is obtained owing to gas-cell optimization and numerical procedures. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…The dependence of such losses from HCW curving radius has been investigated for different metallic, and single-layer dielectric coated HCWs with bore size > 300 µm [14,15]. In Fig.…”

Section: Bending Lossesmentioning

confidence: 99%

“…These differences are larger for 5-6 µm wavelengths (up to ~1.7 dB) and become almost negligible at 10.5 µm. The reason for these discrepancies is explained in terms of additional scattering losses due to the inner metallic surface roughness, which are inversely proportional to the wavelength squared [14,15].…”

Section: Introductionmentioning

confidence: 99%

Single mode operation with mid-IR hollow fibers in the range 51-105 µm

Sampaolo¹,

Patimisco²,

Kriesel³

et al. 2015

Opt. Express

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Single mode beam delivery in the mid-infrared spectral range 5.1-10.5 μm employing flexible hollow glass waveguides of 15 cm and 50 cm lengths, with metallic/dielectric internal layers and a bore diameter of 200 μm were demonstrated. Three quantum cascade lasers were coupled with the hollow core fibers. For a fiber length of 15 cm, we measured losses down to 1.55 dB at 5.4 μm and 0.9 dB at 10.5 μm. The influence of the launch conditions in the fiber on the propagation losses and on the beam profile at the waveguide exit was analyzed. At 10.5 µm laser wavelength we found near perfect agreement between measured and theoretical losses, while at ~5 µm and ~6 µm wavelengths the losses were higher than expected. This discrepancy can be explained considering an additional scattering loss effect, which scales as 1/λ 2 and is due to surface roughness of the metallic layer used to form the high-reflective internal layer structure of the hollow core waveguide. 37(9), 2454-2458 (1998). 10. J. Kriesel, G. M. Hagglund, N. Gat, V. Spagnolo, and P. Patimisco, "Spatial mode filtering of mid-infrared (mid-IR) laser beams with hollow core fiber optics," Proc. SPIE 8993, 89930V (2014). 11. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7062#SingleMode.

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Optical properties of small-bore hollow glass waveguides

Cited by 107 publications

References 18 publications

Theoretical model and experimental studies of infrared radiation propagation in hollow plastic and glass waveguides

Theoretical model and experimental studies of infrared radiation propagation in hollow plastic and glass waveguides

Design and optimization of hollow-optical-fiber gas cell for infrared spectroscopy

Single mode operation with mid-IR hollow fibers in the range 51-105 µm

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