Enhanced TOAD Performance by Negative Frequency-Detuned Signal and Control Picosecond Optical Pulses

J. M. Tang; P. S. Spencer; P. Rees; K. A. Shore

doi:10.1109/3.842099

Enhanced TOAD Performance by Negative Frequency-Detuned Signal and Control Picosecond Optical Pulses

J. M. Tang, P. S. Spencer, P. Rees, K. A. Shore

Houston Methodist

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A numerical investigation has been undertaken of the operating characteristics of Terahertz Optical Asymmetric Demultiplexer (TOAD) devices subject to frequency-detuned signal and control picosecond optical pulses, taking into account the wavelength dependence of the differential gain coefficient and carrier density linewidth enhancement factor. It is shown that, by shifting the signal pulses toward lower frequencies compared with that of control pulses, the contrast ratio can be significantly enhanced and the amplitude modulation can simultaneously be considerably decreased. The switching energy demonstrates small changes over a broad frequency detuning range. The simulations show excellent agreement with published experimental measurements. Furthermore, two operational modes for the TOAD configuration are identified.

Original language	English (US)
Pages (from-to)	574-582
Number of pages	9
Journal	IEEE Journal of Quantum Electronics
Volume	36
Issue number	5
DOIs	https://doi.org/10.1109/3.842099
State	Published - May 2000

Keywords

All-optical switching
Nonlinear optics
Semiconductor optical amplifier (SOA)
Terahertz optical asymmetric demultiplexer (TOAD)
Ultrashort optical pulse

ASJC Scopus subject areas

Electrical and Electronic Engineering
Physics and Astronomy (miscellaneous)

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10.1109/3.842099

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title = "Enhanced TOAD Performance by Negative Frequency-Detuned Signal and Control Picosecond Optical Pulses",

abstract = "A numerical investigation has been undertaken of the operating characteristics of Terahertz Optical Asymmetric Demultiplexer (TOAD) devices subject to frequency-detuned signal and control picosecond optical pulses, taking into account the wavelength dependence of the differential gain coefficient and carrier density linewidth enhancement factor. It is shown that, by shifting the signal pulses toward lower frequencies compared with that of control pulses, the contrast ratio can be significantly enhanced and the amplitude modulation can simultaneously be considerably decreased. The switching energy demonstrates small changes over a broad frequency detuning range. The simulations show excellent agreement with published experimental measurements. Furthermore, two operational modes for the TOAD configuration are identified.",

keywords = "All-optical switching, Nonlinear optics, Semiconductor optical amplifier (SOA), Terahertz optical asymmetric demultiplexer (TOAD), Ultrashort optical pulse",

author = "Tang, {J. M.} and Spencer, {P. S.} and P. Rees and Shore, {K. A.}",

note = "Funding Information: Manuscript received November 15, 1999. This work was supported by the EPSRC under Grant GR/M65717. The authors are with the University of Wales, Bangor, School of Electronic Engineering and Computer Systems, Bangor LL57 1UT, U.K. Publisher Item Identifier S 0018-9197(00)03541-7. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "2000",

month = may,

doi = "10.1109/3.842099",

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volume = "36",

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journal = "IEEE Journal of Quantum Electronics",

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AU - Tang, J. M.

AU - Spencer, P. S.

AU - Rees, P.

AU - Shore, K. A.

N1 - Funding Information: Manuscript received November 15, 1999. This work was supported by the EPSRC under Grant GR/M65717. The authors are with the University of Wales, Bangor, School of Electronic Engineering and Computer Systems, Bangor LL57 1UT, U.K. Publisher Item Identifier S 0018-9197(00)03541-7. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2000/5

Y1 - 2000/5

N2 - A numerical investigation has been undertaken of the operating characteristics of Terahertz Optical Asymmetric Demultiplexer (TOAD) devices subject to frequency-detuned signal and control picosecond optical pulses, taking into account the wavelength dependence of the differential gain coefficient and carrier density linewidth enhancement factor. It is shown that, by shifting the signal pulses toward lower frequencies compared with that of control pulses, the contrast ratio can be significantly enhanced and the amplitude modulation can simultaneously be considerably decreased. The switching energy demonstrates small changes over a broad frequency detuning range. The simulations show excellent agreement with published experimental measurements. Furthermore, two operational modes for the TOAD configuration are identified.

AB - A numerical investigation has been undertaken of the operating characteristics of Terahertz Optical Asymmetric Demultiplexer (TOAD) devices subject to frequency-detuned signal and control picosecond optical pulses, taking into account the wavelength dependence of the differential gain coefficient and carrier density linewidth enhancement factor. It is shown that, by shifting the signal pulses toward lower frequencies compared with that of control pulses, the contrast ratio can be significantly enhanced and the amplitude modulation can simultaneously be considerably decreased. The switching energy demonstrates small changes over a broad frequency detuning range. The simulations show excellent agreement with published experimental measurements. Furthermore, two operational modes for the TOAD configuration are identified.

KW - All-optical switching

KW - Nonlinear optics

KW - Semiconductor optical amplifier (SOA)

KW - Terahertz optical asymmetric demultiplexer (TOAD)

KW - Ultrashort optical pulse

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JF - IEEE Journal of Quantum Electronics

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Enhanced TOAD Performance by Negative Frequency-Detuned Signal and Control Picosecond Optical Pulses

Abstract

Keywords

ASJC Scopus subject areas

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