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 language | English |
|---|---|
| Pages (from-to) | 763-769 |
| Number of pages | 7 |
| Journal | IEEE Journal on Selected Topics in Quantum Electronics |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2003 May 1 |
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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
Performance of Traveling-Wave Electroabsorption Modulators Depending on Microwave Properties of Waveguides Calculated Using the FDTD Method. / Nam, Seungki; Kim, Yonggyoo; Lee, Jae Hoon; Kim, Moonil; Jeong, Jichai.
In: IEEE Journal on Selected Topics in Quantum Electronics, Vol. 9, No. 3, 01.05.2003, p. 763-769.Research output: Contribution to journal › Article
}
TY - JOUR
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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UR - http://www.scopus.com/inward/citedby.url?scp=0346276712&partnerID=8YFLogxK
U2 - 10.1109/JSTQE.2003.818847
DO - 10.1109/JSTQE.2003.818847
M3 - Article
AN - SCOPUS:0346276712
VL - 9
SP - 763
EP - 769
JO - IEEE Journal on Selected Topics in Quantum Electronics
JF - IEEE Journal on Selected Topics in Quantum Electronics
SN - 1077-260X
IS - 3
ER -