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Chapter 13 Distributed Feedback (DFB) Structures and ...
courses.cit.cornell.eduPeriodic 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 waveguide before the growth of the top InP layer. Such periodic grating structures are examples of