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32-Channel Optical Interleaver/Deinterleaver Using Fibonacci Quasi-Periodic Structures

By Saeed Golmohammadi
Progress In Electromagnetics Research B, Vol. 55, 217-240, 2013


The design of Interleaver/Deinterleavers using Fibonacci-class quasistructures is proposed. We introduce an optical passive configuration composed of Fibonacci quasistructures and circulators which acts as interleaver and deinterleaver. Odd and even channels are interleaved/deinterleaved with dense wavelength-division multiplexing (DWDM) multichannel filter based on Fibonacci quasi-periodic structures. We use Fibonacci based DWDM filters in order to separate the odd and even wavelength channels. These quasi-periodic structures, with different geometrical and physical parameters, act as DWDM filters that reflect even and odd wavelengths. A modified numerical approach is presented to design the Fibonacci based DWDM filter. We demonstrate that it is possible to optimize DWDM filter response by varying the parameters of the Fibonacci structure, such as generation number, Fibonacci order and optical lengths of the layers. The proposed filter structures can separate 32 DWDM channels with 0.8 nm spacing into two 16 DWDM channels with 1.6 nm spacing. In order to eliminate the crosstalk between the adjacent channels, we apply the refractive index profile apodization. These structures are useful for multiplexing/demultiplexing of a high numbers of the channels.


Saeed Golmohammadi, "32-Channel Optical Interleaver/Deinterleaver Using Fibonacci Quasi-Periodic Structures," Progress In Electromagnetics Research B, Vol. 55, 217-240, 2013.


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