Abstract
Using a simplified chirp z-transform (CZT) algorithm based on the discrete-time convolution method, this paper presents the synthesis of a simplified architecture of a reconfigurable optical chirp z-transform (OCZT) processor based on the silica-based planar lightwave circuit (PLC) technology. In the simplified architecture of the reconfigurable OCZT, the required number of optical components is small and there are no waveguide crossings which make fabrication easy. The design of a novel type of optical discrete Fourier transform (ODFT) processor as a special case of the synthesized OCZT is then presented to demonstrate its effectiveness. The designed ODFT can be potentially used as an optical demultiplexer at the receiver of an optical fiber orthogonal frequency division multiplexing (OFDM) transmission system.
Highlights
This work is an extension of the author’s recent article [1]
As the first important application of the designed tunable optical chirp z-transform (OCZT) processor in [1], [2] has presented the design of a tunable optical discrete Fourier transform (ODFT) processor and its application as a tunable optical demultiplexer at the receiver of an optical fiber orthogonal frequency division multiplexing (OFDM) transmission system
In [1], the architecture of the tunable OCZT processor was rather complex because the design was based on the non-simplified chirp z-transform (CZT) algorithm that involved a very large number of N L multiplications and additions
Summary
By direct realization of the CZT algorithm (which is referred to as the non-simplified CZT algorithm), a novel reconfigurable OCZT processor synthesized using the silica-based PLC technology has been presented, to the author’s knowledge, for the first time in [1]. Several case studies of the author’s novel tunable ODFT-based OFDM demultiplexer have been investigated to demonstrate several of its unique capabilities over the existing non-tunable ODFT-based OFDM demultiplexers [2]. In [1], the architecture of the tunable OCZT processor was rather complex because the design was based on the non-simplified CZT algorithm (in which no simplifications were made on the algorithm) that involved a very large number of N L multiplications and additions. The number of optical components in the synthesized adaptable OCZT processor was very large (especially when N and L were large) and that there were a number of waveguide crossings or intersections which would make fabrication difficult [1]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
