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Optically Injection-Locked 1.55- \mu m VCSELs as Upstream Transmitters in WDM-PONs

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5 Author(s)
Wong, E. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA ; Xiaoxue Zhao ; Chang-Hasnain, C.J. ; Hofmann, W.
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The wavelength-division-multiplexed passive optical network is actively being developed to meet the ever-increasing bandwidth demands of end users in a cost-effective and future-proof manner. In this work, we propose a novel scheme that utilizes injection-locked 1.55-mum vertical-cavity surface-emitting lasers (VCSELs) for operation as low-cost, stable, directly modulated, and potentially uncooled upstream transmitters, whereby the injection-locking master source is furnished by modulated downstream signals. Our scheme eliminates the need for external injection-locking optical sources, external modulators, and wavelength stabilization circuitry. We show through experiments that the injection-locked VCSEL favors low injection powers and responds only strongly to the carrier but not the modulated data of the downstream signal, with good upstream transmission performance obtained over 25-km fiber

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 22 )

Date of Publication:

Nov.15, 2006

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