Mode conversion of ultrafast pulses by grating structures in layered dielectric waveguides

Tao Liang; R. W. Ziolkowski

doi:10.1109/50.633602

Mode conversion of ultrafast pulses by grating structures in layered dielectric waveguides

Tao Liang, R. W. Ziolkowski

Electrical and Computer Engineering

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

10 Scopus citations

Abstract

Various grating configurations are introduced to develop structures for the mode conversion of an ultrafast, ultrawide-bandwidth optical pulse propagating in a layered dielectric waveguide. Introducing a new technique for efficient, real-time mode extraction, we examine these schemes with a full-wave, vector, finite difference time domain (FDTD) Maxwell equation simulator. The resulting FDTD simulator is very flexible and accurate; it is capable of modeling the interaction of few- or many-cycle optical pulsed modes with finite, aperiodic gratings with complex material configurations. The grating structure can be tailored to the pulsed optical modes of interest with this FDTD simulator. It is used to design a composite mode-conversion grating structure that realizes a 29.45% increase in the converted mode energy for an ultrafast six-cycle optical pulse over that achieved with standard uniform grating convertors.

Original language	English (US)
Pages (from-to)	1966-1973
Number of pages	8
Journal	Journal of Lightwave Technology
Volume	15
Issue number	10
DOIs	https://doi.org/10.1109/50.633602
State	Published - Oct 1997

Keywords

Dielectric waveguides
FDTD
Mode conversion
Mode extraction
Numerical modeling
Ultrafast optical pulses

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1109/50.633602

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@article{5d0c4cb33fbe4794a987100a4fafc3a2,

title = "Mode conversion of ultrafast pulses by grating structures in layered dielectric waveguides",

abstract = "Various grating configurations are introduced to develop structures for the mode conversion of an ultrafast, ultrawide-bandwidth optical pulse propagating in a layered dielectric waveguide. Introducing a new technique for efficient, real-time mode extraction, we examine these schemes with a full-wave, vector, finite difference time domain (FDTD) Maxwell equation simulator. The resulting FDTD simulator is very flexible and accurate; it is capable of modeling the interaction of few- or many-cycle optical pulsed modes with finite, aperiodic gratings with complex material configurations. The grating structure can be tailored to the pulsed optical modes of interest with this FDTD simulator. It is used to design a composite mode-conversion grating structure that realizes a 29.45% increase in the converted mode energy for an ultrafast six-cycle optical pulse over that achieved with standard uniform grating convertors.",

keywords = "Dielectric waveguides, FDTD, Mode conversion, Mode extraction, Numerical modeling, Ultrafast optical pulses",

author = "Tao Liang and Ziolkowski, {R. W.}",

note = "Funding Information: Manuscript received October 15, 1996. This work was supported in part by the Office of Naval Research under Grant N0014-95-1-0636 and by the Air Force Office of Scientific Research, Air Force Materiel Command, USAF, under Grant F49620-96-1-0039.",

year = "1997",

month = oct,

doi = "10.1109/50.633602",

language = "English (US)",

volume = "15",

pages = "1966--1973",

journal = "Journal of Lightwave Technology",

issn = "0733-8724",

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T1 - Mode conversion of ultrafast pulses by grating structures in layered dielectric waveguides

AU - Liang, Tao

AU - Ziolkowski, R. W.

N1 - Funding Information: Manuscript received October 15, 1996. This work was supported in part by the Office of Naval Research under Grant N0014-95-1-0636 and by the Air Force Office of Scientific Research, Air Force Materiel Command, USAF, under Grant F49620-96-1-0039.

PY - 1997/10

Y1 - 1997/10

N2 - Various grating configurations are introduced to develop structures for the mode conversion of an ultrafast, ultrawide-bandwidth optical pulse propagating in a layered dielectric waveguide. Introducing a new technique for efficient, real-time mode extraction, we examine these schemes with a full-wave, vector, finite difference time domain (FDTD) Maxwell equation simulator. The resulting FDTD simulator is very flexible and accurate; it is capable of modeling the interaction of few- or many-cycle optical pulsed modes with finite, aperiodic gratings with complex material configurations. The grating structure can be tailored to the pulsed optical modes of interest with this FDTD simulator. It is used to design a composite mode-conversion grating structure that realizes a 29.45% increase in the converted mode energy for an ultrafast six-cycle optical pulse over that achieved with standard uniform grating convertors.

AB - Various grating configurations are introduced to develop structures for the mode conversion of an ultrafast, ultrawide-bandwidth optical pulse propagating in a layered dielectric waveguide. Introducing a new technique for efficient, real-time mode extraction, we examine these schemes with a full-wave, vector, finite difference time domain (FDTD) Maxwell equation simulator. The resulting FDTD simulator is very flexible and accurate; it is capable of modeling the interaction of few- or many-cycle optical pulsed modes with finite, aperiodic gratings with complex material configurations. The grating structure can be tailored to the pulsed optical modes of interest with this FDTD simulator. It is used to design a composite mode-conversion grating structure that realizes a 29.45% increase in the converted mode energy for an ultrafast six-cycle optical pulse over that achieved with standard uniform grating convertors.

KW - Dielectric waveguides

KW - FDTD

KW - Mode conversion

KW - Mode extraction

KW - Numerical modeling

KW - Ultrafast optical pulses

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JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

IS - 10

ER -

Mode conversion of ultrafast pulses by grating structures in layered dielectric waveguides

Abstract

Keywords

ASJC Scopus subject areas

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