TOAD having enhanced extinction ratio of the switching window

P.R. Prucnal (Inventor), I. Glesk (Inventor), Robert J. Runser (Inventor), Christine Coldwell (Inventor), Bing C. Wang (Inventor)

Research output: Patent

Abstract

A Terahertz Optical Asymmetric Demultiplexer (TOAD) having preferably two non-linear elements (NLES) in which the extinction ratio is enhanced by saturating both NLEs when closing a switching window. A data signal input on one port of the TOAD is split onto two optical paths, each including one NLE. The optical paths converge at an output port. To start a switching window, a first control signal is input on an optical path that includes only one of the two NLEs. To close a switching window, one or more control signals are input such that both NLEs receive a control signal at a predetermined time after the first control signal is received by one of the NLEs. Only data signals passing through the first NLE during the switching window are output on the output port. Since both NLEs receive a second control signal at the same time, they decay together and thus avoid creation of unintended switching windows. Additionally, in certain embodiments of the present invention, the second control signal can be input on the data port or the output port, eliminating the need for a separate port for the second control signal as required by certain known TOADs.
Original languageEnglish
Patent numberUS 6535662
IPCG01N 2100
Publication statusPublished - 18 Mar 2003

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Patents and inventions

Keywords

  • Terahertz Optical Asymmetric Demultiplexer
  • TOAD
  • extinction ratio
  • optical paths
  • control signal

Cite this

Prucnal, P. R., Glesk, I., Runser, R. J., Coldwell, C., & Wang, B. C. (2003). IPC No. G01N 2100. TOAD having enhanced extinction ratio of the switching window. (Patent No. US 6535662).
Prucnal, P.R. (Inventor) ; Glesk, I. (Inventor) ; Runser, Robert J. (Inventor) ; Coldwell, Christine (Inventor) ; Wang, Bing C. (Inventor). / TOAD having enhanced extinction ratio of the switching window. IPC No.: G01N 2100. Patent No.: US 6535662.
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abstract = "A Terahertz Optical Asymmetric Demultiplexer (TOAD) having preferably two non-linear elements (NLES) in which the extinction ratio is enhanced by saturating both NLEs when closing a switching window. A data signal input on one port of the TOAD is split onto two optical paths, each including one NLE. The optical paths converge at an output port. To start a switching window, a first control signal is input on an optical path that includes only one of the two NLEs. To close a switching window, one or more control signals are input such that both NLEs receive a control signal at a predetermined time after the first control signal is received by one of the NLEs. Only data signals passing through the first NLE during the switching window are output on the output port. Since both NLEs receive a second control signal at the same time, they decay together and thus avoid creation of unintended switching windows. Additionally, in certain embodiments of the present invention, the second control signal can be input on the data port or the output port, eliminating the need for a separate port for the second control signal as required by certain known TOADs.",
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Prucnal, PR, Glesk, I, Runser, RJ, Coldwell, C & Wang, BC 2003, TOAD having enhanced extinction ratio of the switching window, Patent No. US 6535662, IPC No. G01N 2100.

TOAD having enhanced extinction ratio of the switching window. / Prucnal, P.R. (Inventor); Glesk, I. (Inventor); Runser, Robert J. (Inventor); Coldwell, Christine (Inventor); Wang, Bing C. (Inventor).

IPC No.: G01N 2100. Patent No.: US 6535662.

Research output: Patent

TY - PAT

T1 - TOAD having enhanced extinction ratio of the switching window

AU - Prucnal, P.R.

AU - Glesk, I.

AU - Runser, Robert J.

AU - Coldwell, Christine

AU - Wang, Bing C.

PY - 2003/3/18

Y1 - 2003/3/18

N2 - A Terahertz Optical Asymmetric Demultiplexer (TOAD) having preferably two non-linear elements (NLES) in which the extinction ratio is enhanced by saturating both NLEs when closing a switching window. A data signal input on one port of the TOAD is split onto two optical paths, each including one NLE. The optical paths converge at an output port. To start a switching window, a first control signal is input on an optical path that includes only one of the two NLEs. To close a switching window, one or more control signals are input such that both NLEs receive a control signal at a predetermined time after the first control signal is received by one of the NLEs. Only data signals passing through the first NLE during the switching window are output on the output port. Since both NLEs receive a second control signal at the same time, they decay together and thus avoid creation of unintended switching windows. Additionally, in certain embodiments of the present invention, the second control signal can be input on the data port or the output port, eliminating the need for a separate port for the second control signal as required by certain known TOADs.

AB - A Terahertz Optical Asymmetric Demultiplexer (TOAD) having preferably two non-linear elements (NLES) in which the extinction ratio is enhanced by saturating both NLEs when closing a switching window. A data signal input on one port of the TOAD is split onto two optical paths, each including one NLE. The optical paths converge at an output port. To start a switching window, a first control signal is input on an optical path that includes only one of the two NLEs. To close a switching window, one or more control signals are input such that both NLEs receive a control signal at a predetermined time after the first control signal is received by one of the NLEs. Only data signals passing through the first NLE during the switching window are output on the output port. Since both NLEs receive a second control signal at the same time, they decay together and thus avoid creation of unintended switching windows. Additionally, in certain embodiments of the present invention, the second control signal can be input on the data port or the output port, eliminating the need for a separate port for the second control signal as required by certain known TOADs.

KW - Terahertz Optical Asymmetric Demultiplexer

KW - TOAD

KW - extinction ratio

KW - optical paths

KW - control signal

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Prucnal PR, Glesk I, Runser RJ, Coldwell C, Wang BC, inventors. TOAD having enhanced extinction ratio of the switching window. G01N 2100. 2003 Mar 18.