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High-speed MQW electroabsorption optical modulators integrated with low-loss waveguides

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5 Author(s)
Ido, T. ; Central Res. Lab., Hitachi Ltd., Tokyo, Japan ; Sano, H. ; Suzuki, M. ; Tanaka, S.
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An MQW electro-absorption optical modulator integrated with low-loss input and output waveguides is proposed to achieve larger modulation bandwidth with a shorter modulation region, keeping the total device length large enough for easy fabrication and packaging. A fabricated 1-mm-long modulator with a modulation-region length of 50 μm shows a low insertion loss (7 dB), low driving voltage (V/sub 10/ /sub dB/=2.6 V), and large modulation bandwidth f/sub 3 dB/=40 (GHz) extrapolated from measurements up to 20 GHz. This modulator is suitable for application to ultra-high-speed fiber transmission systems.

Published in:

Photonics Technology Letters, IEEE  (Volume:7 ,  Issue: 2 )