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Spot-size converted polarization-insensitive SOA gate with a vertical tapered submicrometer stripe structure

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12 Author(s)
Yoshimoto, N. ; NTT Opto-Electron. Labs., Kanagawa, Japan ; Magari, K. ; Ito, T. ; Kawaguchi, Y.
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To develop polarization-insensitive semiconductor optical amplifier (SOA) gates into more efficient and functional optical components by using hybrid integration with a planer lightwave circuit (PLC) platform, vertical tapered spot-size converters were integrated into a SOA gate with a narrow mesa-stripe structure of submicrometer width leading to low coupling loss (2.6 dB). Very-low polarization dependence of gain (<0.2 dB) and high extinction ratio (>30 dB) were achieved in a wide wavelength range (40 nm). High-speed (<1 us) gate operation was also demonstrated. These results indicate that the spot-size converted SOA integrated on a PLC platform will perform well in wavelength-division-multiplexing (WDM) applications.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 4 )