Miecyszlaw Dabkowski

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The role of gain in an optical filter is advanced by good agreement between theory and experiment presented herein. The particular integrated photonic filter is composed of four semiconductor optical amplifiers and one four-port coupler located at the intersection of the amplifiers. The four-port coupler is realized using frustrated total internal(More)
Four-port frustrated total internal reflection couplers in InP-based GalnAsP quantum-well substrates are realized and characterized. Each coupler forms an "X" at the perpendicular intersection of two ridge waveguides and is aligned 45° to the optical path. The 180-nm-wide couplers are fabricated by dry etching deep trenches through the quantum wells(More)
A 2D Active Lattice Filter ALF combining a Manhattan grid of waveguide gain segments with nanophotonic couplers at the waveguide intersections is presented. The particular application reported herein is a basic channelizer. The resulting structure is readily described, designed, and analyzed in Z-transform space. Critical to the implementation of the 2D ALF(More)
The first demonstration of an active optical lattice filter with nanophotonic 4-port couplers is reported. The experiments are in good agreement with a z-transform based filter theory. The filter response may be tuned by adjusting the gains of the active optical element of the filter, herein realized with semiconductor optical amplifiers. A key to the(More)
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