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Efficient coupling between laser diodes with a highly elliptic field and single-mode fibers by means of GIO fibers

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5 Author(s)
Ogura, A. ; Fac. of Eng., Utsunomiya Univ., Japan ; Kuchiki, S. ; Shiraishi, K. ; Ohta, K.
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A new configuration is proposed for efficient coupling between laser diodes (LDs) with a highly elliptic field and single-mode fibers (SMFs). Graded-index oval-core (GIO) fibers were employed to match the LD and SMF field profiles. Experiments show that the coupling loss between the LD, operating at a wavelength of 980 nm with a field profile aspect ratio of 5.9, and SMF is effectively 0.6 dB. The tolerances for lateral displacements are roughly an order of magnitude larger than those in the conventional wedge-shaped lensed-fiber coupling scheme.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 11 )