A lensed GIO fiber with a long working distance for the coupling between laser diodes with elliptical fields and single-mode fibers

The experimental performance of a new lensed fiber employing a graded-index oval-core fiber is presented for the first time. The new scheme has a long working distance and a high coupling efficiency compared with conventional wedge-shaped lensed fibers. Experiments show that the coupling loss betwee...

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Bibliographic Details
Published in:IEEE photonics technology letters 2004-04, Vol.16 (4), p.1104-1106
Main Authors: Shiraishi, K., Yoda, H., Endo, T., Tomita, I.
Format: Article
Language:English
Subjects:
Assembly
Diode lasers
Displacement
Distributed amplifiers
Fabrication
Fibers
Joining
Laser diodes
Noise levels
Optical coupling
Optical fiber amplifiers
Optical fiber devices
Optical fibers
Semiconductor optical amplifiers
Stimulated emission
Tilt
Tolerances
Wavelengths
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Summary:The experimental performance of a new lensed fiber employing a graded-index oval-core fiber is presented for the first time. The new scheme has a long working distance and a high coupling efficiency compared with conventional wedge-shaped lensed fibers. Experiments show that the coupling loss between a laser diode, operating at a wavelength of 980 nm with a field profile aspect ratio of 5.9, and single-mode fiber is as low as 1.3 dB with the long working distance of 30 μm. Measured tolerance characteristics against lateral displacement and tilt are acceptable for practical active alignment.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2004.824629