Lasers, Fiber Optics, and Communications

Aspect ratio-based formulation for far-field characterization of single-mode trapezoidal index fibers

[+] Author Affiliations
Titas Das, Jayee Sinha

University of Calcutta, Department of Electronic Science, Kolkata, India

Somenath Sarkar

University of Calcutta, Department of Electronic Science, Kolkata, India

University of Calcutta, Centre for Research in Nanoscience and Nanotechnology, Kolkata, India

Opt. Eng. 56(4), 046106 (Apr 17, 2017). doi:10.1117/1.OE.56.4.046106
History: Received March 3, 2017; Accepted March 29, 2017
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Abstract.  We present simple and complete empirical relations to predict the angle of beam divergence in terms of normalized frequency and aspect ratio of a single-mode trapezoidal index fiber. This is done for the far-field characterization over a long range of normalized frequencies without the calculation of normalized spot sizes. On comparison, we observe an excellent match of our results with exact values establishing the validity of our formulation. The formulation should attract attention as a simple alternative to the rigorous methods of estimating the angle of beam divergence for such fibers. It can be widely used by system users and developers for much better control over far-field related calculations and experiments.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Titas Das ; Jayee Sinha and Somenath Sarkar
"Aspect ratio-based formulation for far-field characterization of single-mode trapezoidal index fibers", Opt. Eng. 56(4), 046106 (Apr 17, 2017). ; http://dx.doi.org/10.1117/1.OE.56.4.046106


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