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

Titas Das; Jayee Sinha; Somenath Sarkar

doi:10.1117/1.OE.56.4.046106

17 April 2017 Aspect ratio-based formulation for far-field characterization of single-mode trapezoidal index fibers

Titas Das, Jayee Sinha, Somenath Sarkar

Author Affiliations +

Optical Engineering, Vol. 56, Issue 4, 046106 (April 2017). https://doi.org/10.1117/1.OE.56.4.046106

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

Received: 3 March 2017; Accepted: 29 March 2017; Published: 17 April 2017

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