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High-gain array of semiconductor optical amplifier integrated with bent spot-size converter (BEND SS-SOA)

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6 Author(s)
Y. Suzaki ; NTT Photonics Labs., Kanagawa, Japan ; K. Magari ; Y. Kondo ; Y. Kawaguchi
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We propose a high-gain semiconductor optical amplifier with an integrated bent spot-size converter (BEND SS-SOA). A straight active waveguide enables us to use a pn-buried heterostructure (pn-BH) with a high current-blocking effect and uniform characteristics. We can optimize a bent spot-size converter waveguide to provide low optical feedback from the facets and high-coupling efficiency to a flat-end optical fiber with low radiation loss due to the bend. The devices we fabricated achieve a high fiber-to-fiber gain of 18 dB with a coupling efficiency of -3.5 dB, and we have demonstrated a four-channel array with uniform characteristics

Published in:

Journal of Lightwave Technology  (Volume:19 ,  Issue: 11 )