Guided-wave intensity modulators using amplitude-and-phase perturbations
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TLDR
In this paper, a theoretical analysis of intensity modulation in coupled waveguides and Mach-Zehnder interferometers is presented, and the predicted depth of modulation is greater than that of conventional loss-modulators over a range of Delta N or Delta E.Abstract:
A theoretical analysis of intensity modulation in coupled waveguides and Mach-Zehnder interferometers is reported. Simultaneous phase and amplitude perturbations Delta n+ iota Delta k are considered. Predictions are made about the performance of electrooptic GaAs and InP modulators controlled by the free-carrier effect ( Delta N) or by the Franz-Keldysh effect ( Delta E). The phase-dominant condition Delta n>5 Delta k is optimal. The predicted depth of modulation is greater than that of conventional loss-modulators over a range of Delta N or Delta E. >read more
Citations
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References
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Electrorefraction and electroabsorption in InP, GaAs, GaSb, InAs, and InSb
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Frequency chirping of external modulation and its reduction
Fumio Koyama,Kenichi Iga +1 more
TL;DR: In this paper, a general formula for frequency chirping of external intensity loss modulation which is caused by phase modulation due to an accompanied refractive index change is given, which can be reduced by optimising the optical modulation waveform.