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Title: Metallic attenuated total reflection infrared hollow fibers for robust optical transmission systems

A durable metallic attenuated total reflection (ATR) hollow fiber (bore size: 1.45 mm, wall thickness: 50 μm) was designed and fabricated based on a nickel capillary tube and hexagonal germanium dioxide (GeO{sub 2}). The anomalous dispersion of the hexagonal GeO{sub 2} layer grown inside a nickel tube achieves low-loss light transmission at two peak-power wavelengths for CO{sub 2} laser devices (10.2 and 10.6 μm). An 11–28 W, 10.2 or 10.6 μm CO{sub 2} laser power was steadily delivered via a fiber elastically bent from 0° to 90° (radius: 45 cm) for over 40 min (transmission loss: 0.22 to 4.2 dB/m). Theoretically fitting the measured temperatures showed that front-end clipping caused greater thermal loading than the distributed mode absorption. The maximum external temperature of a nickel ATR fiber is much lower than that of a silica glass ATR fiber owing to their different heat dissipation abilities. The HE{sub 11} mode purity of the output beam profiles decreased from 90.3% to 44.7% as the bending angle increased from 0° to 90°. Large core sizes and wall roughnesses (scattering loss 0.04 dB/m) contributed to mode mixing and excess losses that were above the value predicted by the classical Marcatili and Schmeltzer equation (0.024–0.037 dB/m).
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241 (China)
  2. (China)
  3. Department of Physics, Shanghai Normal University, 100 Gui Lin Road, Shanghai 200234 (China)
  4. School of Information Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433 (China)
Publication Date:
OSTI Identifier:
22303920
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; CAPILLARIES; COOLING; ENERGY LOSSES; FIBERS; GERMANIUM; GERMANIUM OXIDES; GLASS; HEAT TRANSFER; IMPURITIES; LAYERS; LIGHT TRANSMISSION; NICKEL; REFLECTION; SCATTERING; SILICA; THERMAL DIFFUSIVITY; THERMAL EFFLUENTS; THICKNESS