Chapter 13 Distributed Feedback (DFB) Structures and ...
Lasers 13.1 Distributed Feedback (DFB) Gratings in Waveguides 13.1.1 Introduction: Periodic structures, like the DBR mirrors in VCSELs, can be also realized in a waveguide, as shown below in the case of a InGaAsP/InP waveguide. In the waveguide shown above, periodic grooves have been etched in the top surface of the InGaAsP
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