Performance of Traveling-Wave Electroabsorption Modulators Depending on Microwave Properties of Waveguides Calculated Using the FDTD Method

Seungki Nam, Yonggyoo Kim, Jae Hoon Lee, Moonil Kim, Jichai Jeong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present a method to analyze electrical and optical characteristics of traveling-wave electroabsorption modulators (TW-EAMs) using the finite-difference time-domain method. We consider the interaction between electromagnetic fields and optical powers in waveguides in time domain to model electrical and optical behaviors of TW-EAMs. The effects of microwave properties of waveguides on modulation response and output optical power of TW-EAMs are analyzed by the proposed method. The characteristic impedance of TW-EAMs is more important than microwave index to obtain large modulation bandwidth of TW-EAMs when impedance matching techniques are not used. However, effective refractive index match between microwave and lightwave becomes important as the waveguide length increases. The microwave property closely related to the extinction ratio of output optical powers is the microwave loss. When impedance match is achieved by low-impedance termination, the velocity matching between microwave and lightwave becomes important.

Original languageEnglish
Pages (from-to)763-769
Number of pages7
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume9
Issue number3
DOIs
Publication statusPublished - 2003 May 1

Fingerprint

Electroabsorption modulators
finite difference time domain method
traveling waves
modulators
Waveguides
Microwaves
waveguides
microwaves
impedance
Modulation
modulation
impedance matching
output
Finite difference time domain method
Electromagnetic fields
Refractive index
electromagnetic fields
extinction
refractivity
bandwidth

Keywords

  • Electroabsorption
  • Finite-difference time-domain (FDTD) method
  • Traveling-wave modulator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

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title = "Performance of Traveling-Wave Electroabsorption Modulators Depending on Microwave Properties of Waveguides Calculated Using the FDTD Method",
abstract = "We present a method to analyze electrical and optical characteristics of traveling-wave electroabsorption modulators (TW-EAMs) using the finite-difference time-domain method. We consider the interaction between electromagnetic fields and optical powers in waveguides in time domain to model electrical and optical behaviors of TW-EAMs. The effects of microwave properties of waveguides on modulation response and output optical power of TW-EAMs are analyzed by the proposed method. The characteristic impedance of TW-EAMs is more important than microwave index to obtain large modulation bandwidth of TW-EAMs when impedance matching techniques are not used. However, effective refractive index match between microwave and lightwave becomes important as the waveguide length increases. The microwave property closely related to the extinction ratio of output optical powers is the microwave loss. When impedance match is achieved by low-impedance termination, the velocity matching between microwave and lightwave becomes important.",
keywords = "Electroabsorption, Finite-difference time-domain (FDTD) method, Traveling-wave modulator",
author = "Seungki Nam and Yonggyoo Kim and Lee, {Jae Hoon} and Moonil Kim and Jichai Jeong",
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T1 - Performance of Traveling-Wave Electroabsorption Modulators Depending on Microwave Properties of Waveguides Calculated Using the FDTD Method

AU - Nam, Seungki

AU - Kim, Yonggyoo

AU - Lee, Jae Hoon

AU - Kim, Moonil

AU - Jeong, Jichai

PY - 2003/5/1

Y1 - 2003/5/1

N2 - We present a method to analyze electrical and optical characteristics of traveling-wave electroabsorption modulators (TW-EAMs) using the finite-difference time-domain method. We consider the interaction between electromagnetic fields and optical powers in waveguides in time domain to model electrical and optical behaviors of TW-EAMs. The effects of microwave properties of waveguides on modulation response and output optical power of TW-EAMs are analyzed by the proposed method. The characteristic impedance of TW-EAMs is more important than microwave index to obtain large modulation bandwidth of TW-EAMs when impedance matching techniques are not used. However, effective refractive index match between microwave and lightwave becomes important as the waveguide length increases. The microwave property closely related to the extinction ratio of output optical powers is the microwave loss. When impedance match is achieved by low-impedance termination, the velocity matching between microwave and lightwave becomes important.

AB - We present a method to analyze electrical and optical characteristics of traveling-wave electroabsorption modulators (TW-EAMs) using the finite-difference time-domain method. We consider the interaction between electromagnetic fields and optical powers in waveguides in time domain to model electrical and optical behaviors of TW-EAMs. The effects of microwave properties of waveguides on modulation response and output optical power of TW-EAMs are analyzed by the proposed method. The characteristic impedance of TW-EAMs is more important than microwave index to obtain large modulation bandwidth of TW-EAMs when impedance matching techniques are not used. However, effective refractive index match between microwave and lightwave becomes important as the waveguide length increases. The microwave property closely related to the extinction ratio of output optical powers is the microwave loss. When impedance match is achieved by low-impedance termination, the velocity matching between microwave and lightwave becomes important.

KW - Electroabsorption

KW - Finite-difference time-domain (FDTD) method

KW - Traveling-wave modulator

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