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Optical bistability in an NLDFB device showing absorption: comparison of feedback efficiencies for different grating profiles and study of the behavior of aperiodic and nonperfect grating profiles

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2 Author(s)
Empsten, A. ; Dept. of Appl. Phys., Vrije Univ., Brussels, Belgium ; Veretennicoff, I.

The influence of the different parameters on the optical bistable behavior of a distributed feedback structure with an intensity-dependent refractive index is studied. Previous work is generalized toward two-dimensional waveguides, showing absorption. A general method is proposed to calculate the coupling coefficients up to a desired accuracy. This method is used to compare the feedback efficiency of sine, rectangular, and trapezoidal grating profiles. The numerical integration routine that was developed allows for the study of combinations of different nonlinear distributed feedback (NLDFB) structures. This is used to do a first investigation on the behavior of NLDFB devices with an aperiodic or nonperfect grating profile

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Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 6 )