Abstract
The influence of residual facet reflection on the small-signal modulation
response and the large-signal eye-diagram performance of 40 Gb/s
electroabsorption modulated lasers (EMLs) is studied. Measurement and
simulation show that the eye-diagram performance is not only limited by the
modulation bandwidth of the device, but also significantly degraded by the
low frequency resonances in the frequency response due to residual facet
reflection. Clear eye-opening has been demonstrated by optimizing the
anti-reflection (AR) coating of the EA modulator facet.
© 2009 IEEE
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