Anti-reflective meta-surfaces on optical fibers: an alternative to AR coatings

Devinder Saini; Ron Mehl; Don Russell

doi:10.1117/12.2546652

21 February 2020 Anti-reflective meta-surfaces on optical fibers: an alternative to AR coatings

Devinder Saini, Ron Mehl, Don Russell

Proceedings Volume 11261, Components and Packaging for Laser Systems VI; 112610T (2020) https://doi.org/10.1117/12.2546652
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

The use of optical fiber in a multitude of applications has been increasing for several decades. This increased use has thrown up some limitations particularly in area of high-power delivery where the low damage threshold of conventional AR coatings has become an issue. Various methods such as the use end caps have been used to reduce this problem, but the fundamental issue remains, AR coatings have a low damage threshold which makes them difficult to use for high power applications. As the demand for high power delivery by optical fibers increases there is a need for more robust AR coatings for fiber end faces. AR coatings have various limitations such as very narrow bandwidth, a relatively low damage threshold compared to that of glass etc. There is need for a better solution. In this paper, we describe the use of meta-surfaces on the end of fibers that can replace standard AR coatings. These surfaces or motheye structures impart AR properties to the end faces of the fibers that are superior in almost every way. They have superior damage threshold than coatings as well as working over a broad wavelength range with no angular dependence. We compare the performance and properties of these structures with that of AR coatings.

Conference Presentation

Citation Download Citation

Devinder Saini, Ron Mehl, and Don Russell "Anti-reflective meta-surfaces on optical fibers: an alternative to AR coatings", Proc. SPIE 11261, Components and Packaging for Laser Systems VI, 112610T (21 February 2020); https://doi.org/10.1117/12.2546652

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