Young_SPIE_2013_r.pdf (1.23 MB)
Coherent optical implementations of the fast Fourier transform and their comparison to the optical implementation of the quantum Fourier transform
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posted on 2023-06-08, 21:38 authored by Rupert YoungRupert Young, Phil BirchPhil Birch, Chris ChatwinChris ChatwinOptical structures to implement the discrete Fourier transform (DFT) and fast Fourier transform (FFT) algorithms for discretely sampled data sets are considered. In particular, the decomposition of the FFT algorithm into the basic Butterfly operations is described, as this allows the algorithm to be fully implemented by the successive coherent addition and subtraction of two wavefronts (the subtraction being performed after one has been appropriately phase shifted), so facilitating a simple and robust hardware implementation based on waveguided hybrid devices as employed in coherent optical detection modules. Further, a comparison is made to the optical structures proposed for the optical implementation of the quantum Fourier transform and they are shown to be very similar.
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Publication status
- Published
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- Published version
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1-26Presentation Type
- lecture
Event name
SPIE Defense, Security and SensingEvent location
Baltimore, USAEvent type
conferenceEvent date
29th April to 3rd May 2013Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2015-07-14First Open Access (FOA) Date
2015-07-14First Compliant Deposit (FCD) Date
2015-07-14Usage metrics
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