Abstract

In this work, step-index optical fibers with up to 0.88 numerical aperture (NA) were designed, modeled, fabricated, and tested. Both ray-tracing and wave-optics propagation analysis were utilized to model the NAs that can be achieved for a step-index optical fiber by modifying the cone angle of the fiber tip. Cone-shaped optical fibers with conical semiangles up to 29°, which renders to NAs around 0.88 in air, were fabricated by static etching and tested when utilized as illumination sources.

Influence of numerical aperture on mode coupling in step-index plastic optical fibers

Svetislav Savović and Alexandar Djordjevich
Appl. Opt. 43(29) 5542-5546 (2004)

Fabrication and characterization of step-index tellurite fibers with varying numerical aperture for near- and mid-infrared nonlinear optics

Clément Strutynski, Jérémy Picot-Clémente, Arnaud Lemiere, Paul Froidevaux, Frédéric Désévédavy, Grégory Gadret, Jean-Charles Jules, Bertrand Kibler, and Frédéric Smektala
J. Opt. Soc. Am. B 33(11) D12-D18 (2016)

Frequency response and bandwidth in low-numerical-aperture step-index plastic optical fibers

Svetislav Savović, Branko Drljača, Milan S. Kovačević, Alexandar Djordjevich, Jovan S. Bajić, Dragan Z. Stupar, and Grzegorz Stepniak
Appl. Opt. 53(30) 6999-7003 (2014)

Numerical and experimental study of microfluidic devices in step-index optical fibers

Jovana Petrovic, Yicheng Lai, and Ian Bennion
Appl. Opt. 47(10) 1410-1416 (2008)

Mode instability dynamics in high-power low-numerical-aperture step-index fiber amplifier

Liangjin Huang, Tianfu Yao, Jinyong Leng, Shaofeng Guo, Rumao Tao, Pu Zhou, and Xiang’ai Cheng
Appl. Opt. 56(19) 5412-5417 (2017)