A new surface-wave acousto-optic time integrating correlator

Berg, N. J.; Abramovitz, I. J.; Lee, J. N.; Casseday, M.W.

doi:10.1063/1.91444

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…Correlation techniques implemented on digital computers are used to perform the analysis on the limited amount of data available today and the process is tedious. Considering that only a small fraction of the 3x10 9 human genome nucleotides is now available in the data banks, a mapping of the entire human genome requires a computational breakthrough.…”

Section: Resumementioning

confidence: 99%

“…A complete search of GenBank Release 65 with a query sequence of 3000 bases currently takes about 8 minutes of CPU time on a 80 MIPS mainframe computer or over five hours on a personal computer operating at 25 MHz. 9 As the database grnws towards its projected size of 3x10 for the human genome alone (discounting inevitable overlaps, repetitions and person-to-person variations), it can be foreseen that current equipment will quickly become utterly impractical to use.…”

Section: Scope Of the Problem And Current Technologymentioning

confidence: 99%

“…perform the correlation of two signals. The many possible ways to build TICs are well documented in the literature [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] and good review papers are available [15,21,27].…”

Section: Time-integrating Correlatorsmentioning

confidence: 99%

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Analysis of DNA sequences by an optical time-integrating correlator

Brousseau¹,

Brousseau

Salt³

et al. 1992

Appl. Opt.

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The analysis of the molecular structure called DNA is of particular interest for the understanding of the basic processes governing life. Correlation techniques implemented on digital computers are currently used to do this analysis, but the process is so slow that the mapping and sequencing of the entire human genome requires a computational breakthrough. This paper presents a new method of performing the analysis of DNA sequences with an optical time-integrating correlator. The method is characterized by short processing times that make the analysis of the entire human genome a tractable enterprise. A processing strategy and the resultant processing times are presented. Experimental proofs of concept for the two types of analysis specified by the strategy are also included.

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Section: Resumementioning

confidence: 99%

Section: Scope Of the Problem And Current Technologymentioning

confidence: 99%

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Analysis of DNA sequences by an optical time-integrating correlator

Brousseau¹,

Brousseau

Salt³

et al. 1992

Appl. Opt.

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A feasibility study of the synchronous and asynchronous operation of a SAW programmable correlator based on a SAW convolver

Messer

Av-Shalom²

1986

International Journal of Electronics

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A feasibility study of the synchronous and asynchronous operation of a SAW programmable correlator based on a SAW convolver HAGIT MESSERt and AMIT AV-SHALOM$ A feasibility study of using a SAW (surface acoustic waves) convolver as a programmable correlation is described. The transformation of the convolver with one of its inputs being time-inverted, into a correlator is discussed. This programmable SAW correlator can operate in two modes: (a) For the synchronous operation, the two inputs to be correlated can be unknown and the required time-inverted replica of one of the inputs is achieved by using SAW time-inversion system. Thus, the correlation between any, almost simultaneous, two inputs of limited time duration can be attained. (b) For the asynclwonous operation, the reference input has to be time-inverted and periodic. A correlation between this reference and any input (of any time duration and at any arrival time) can be performed.The principles of operations of the programmable correlator are demonstrated throughout an experimental system using off-the-shelf devices. While the described experimental system exhibits a relatively modest performance (since we used devices with small time-bandwidth product), it can usefully demonstrate how such a correlator operates in both modes. Of course, using a state-of-the art SAW convolver together with RAC (reflective array compression) and chirp filters for the required time-inversion/scaling, the proposed programmable correlator can have a time-bandwidth product in the order of thousands.

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Integrated acoustooptic circuits and applications

Tsai

1992

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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The recent development of titanium-indiffusion proton-exchange (TIPE) microlenses and lens arrays has made possible the construction of a variety of single- and multichannel integrated acoustooptic (AO) and acoustooptic-electrooptic (EO) circuits in LiNbO(3) channel-planar waveguides 0.1x1.0x2.0 cm(3) in size. These hybrid AO and AO-EO circuits can be fabricated through compatible and well-established technologies. The most recent realization of ion-milled microlenses and lens arrays together with the recent development of gigahertz AO Bragg modulators and EO Bragg modulator arrays have also paved the way for construction of similar but monolithic AO and AO-EO GaAs/GaAlAs waveguides of comparable size. Both types of integrated AO and AO-EO circuits suggest versatile applications in communications signal processing, and computing. Efficient and simultaneous excitation of the channel waveguide array using an ion-milled planar microlens array has facilitated the demonstration of some of these applications.

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A new surface-wave acousto-optic time integrating correlator

Cited by 8 publications

References 3 publications

Analysis of DNA sequences by an optical time-integrating correlator

Analysis of DNA sequences by an optical time-integrating correlator

A feasibility study of the synchronous and asynchronous operation of a SAW programmable correlator based on a SAW convolver

Integrated acoustooptic circuits and applications

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