Theoretical and experimental studies of a spot-size transformer with integrated waveguide for polarization insensitive optical amplifiers

Theoretical and experimental studies of a spot-size transformer with integrated waveguide for polarization insensitive optical amplifiers

The simple fabrication technology of an active waveguide for polarization insensitive optical amplifiers, integrated with tapers and a passive waveguide for fiber coupling, is presented. The spot size transformation along the taper, yielding a mode expansion factor of more than 9 in horizontal direc...

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Veröffentlicht in:Journal of lightwave technology 1995-09, Vol.13 (9), p.1865-1872
Hauptverfasser: Mersali, B., Bruckner, H.J., Feuillade, M., Sainson, S., Ougazzaden, A., Carenco, A.
Format: Artikel
Sprache:eng
Schlagworte:
Integrated optics
Optical coupling
Optical device fabrication
Optical fiber amplifiers
Optical fiber polarization
Optical reflection
Optical waveguide theory
Optical waveguides
Semiconductor optical amplifiers
Stimulated emission
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container_end_page 1872
container_issue 9
container_start_page 1865
container_title Journal of lightwave technology
container_volume 13
creator Mersali, B.
Bruckner, H.J.
Feuillade, M.
Sainson, S.
Ougazzaden, A.
Carenco, A.
description The simple fabrication technology of an active waveguide for polarization insensitive optical amplifiers, integrated with tapers and a passive waveguide for fiber coupling, is presented. The spot size transformation along the taper, yielding a mode expansion factor of more than 9 in horizontal direction and about 2 in vertical direction, is experimentally verified and the results are compared to theoretical computations. Using a cleaved single mode fiber, the coupling loss is as low as 2.6 dB with -1-dB positional tolerances of 2.2 /spl mu/m and 1.5 /spl mu/m in vertical and horizontal directions. Besides relaxing on fiber coupling, the large spot size transformation in horizontal direction allows for a drastic reduction of the reflection coefficient to less than 10/sup -3/ at a facet tilted by 4/spl deg/ with respect to the waveguide axis.< >
doi_str_mv 10.1109/50.464736
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subjects Integrated optics
Optical coupling
Optical device fabrication
Optical fiber amplifiers
Optical fiber polarization
Optical reflection
Optical waveguide theory
Optical waveguides
Semiconductor optical amplifiers
Stimulated emission
title Theoretical and experimental studies of a spot-size transformer with integrated waveguide for polarization insensitive optical amplifiers
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