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Ray tracing through a two ball uniaxial sapphire lens system in a single mode fiber-to-fiber coupler

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2 Author(s)
Landry, G.D. ; Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA ; Maldonado, T.A.

A worst case ray trace analysis is presented for a two ball uniaxial lens system in a single mode fiber-to-fiber coupler. The purpose is to determine if the e-wave Poynting vector walkoff effect contributes adversely to coupling loss due to beam offset. Sapphire ball lenses with radii of 250 μm separated by 500 μm are used to produce numerical results at λ=1.3 μm. A worst case offset of 4.302 μm is calculated at the coupler exit. In addition, aberration due to birefringent focusing is examined; uniaxial ball lenses focus the o-wave and e-wave at different points

Published in:

Lightwave Technology, Journal of  (Volume:14 ,  Issue: 3 )