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Proceedings Article

Measuring the spatial distribution of rare-earth dopants in high-power optical fibers

[+] Author Affiliations
A. D. Yablon

Interfiber Analysis (USA)

Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79141N (February 10, 2011); doi:10.1117/12.873291
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From Conference Volume 7914

  • Fiber Lasers VIII: Technology, Systems, and Applications
  • Jay W. Dawson
  • San Francisco, California, USA | January 22, 2011

abstract

For the first time, a non-destructive technique for spatially resolving the location and relative concentration of rare-earth dopants in an optical fiber is demonstrated. This novel technique is based on computerized tomographic detection of spontaneous emission and achieves micron-scale spatial resolution with the aid of oil-immersion imaging. In addition to elucidating interactions between the signal, pump, and dopant distributions, the measurement described here can reveal shortcomings in fiber manufacturing. Since the technique is non-destructive and can be scanned along the fiber length, it can map the full 3-dimensional distribution of complex rare-earth-doped fiber structures including gratings, physical tapers, fusion splices, and even couplers. Experimental data obtained from commercially available Yb-doped silica optical fibers is presented, contrasted, and compared to refractive index profile data. In principle the technique can also be applied to Er-, Bi-, or Tm-doped silica or non-silica optical fibers.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

A. D. Yablon
"Measuring the spatial distribution of rare-earth dopants in high-power optical fibers", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79141N (February 10, 2011); doi:10.1117/12.873291; http://dx.doi.org/10.1117/12.873291


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