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International Journal on Smart Sensing and Intelligent Systems
Édition 15 (2022): Edition 1 (January 2022)
Accès libre
The ordinary negative changing refractive index for estimation of optical confinement factor
Ahmad S. Abdullah
Ahmad S. Abdullah
et
Sadeq Adnan Hbeeb
Sadeq Adnan Hbeeb
| 29 juin 2022
International Journal on Smart Sensing and Intelligent Systems
Édition 15 (2022): Edition 1 (January 2022)
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Article Category:
Article
Publié en ligne:
29 juin 2022
Pages:
-
Reçu:
23 déc. 2021
DOI:
https://doi.org/10.2478/ijssis-2022-0009
Mots clés
Electro-optic effect
,
Lithium niobate LN
,
Mach–Zehnder modulator MZM
,
Optical confinement factor
© 2022 Ahmad S. Abdullah et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Figure 1
Applied electric field along z-direction changes the refractive index of crystal.
Figure 2
(a) A Mach–Zehnder interferometer modulator MZIM. (b) The cross-sectional diagram of the MZIM and the channel of the waveguides.
Figure 3
Integrated LN Mach-Zehnder modulator MZM: (a) top view and (b) cross-section area.
Figure 4
MZI electro-optic modulator based on LiNbO3.
Figure 5
The ordinary negative changing of refractive index by applying electric field versus different lengths of arms.
Figure 6
The ordinary negative changing of refractive index as a function of the confinement factor under different intensity of the applied electrical field.
Figure 7
The ordinary negative changing of refractive index as a function of refractive index versus different lengths of arms for LiTaO3.
Figure 8
The ordinary negative changing of refractive index as a function of electro-optic coefficient versus different lengths of arms for LiTaO3.
Figure 9
The ordinary negative changing of refractive index with wavelength under different applied electric fields for LiTaO3.
Electro-optic coefficients (r33), refractive index (no) and wavelengths (λ), for LN.4.
r
33
(pm/V)
Wavelength (nm)
n
o
Reference
31
633
2.2864
(
Casson et al., 2004
)
25
1560
2.2108
(
Casson et al., 2004
)
The comparison between the reference paper (Chang et al., 2017; Qi and Li, 2020) and this work.
Reference
Δ
n
L
d
Δ
Ø
E
Γ
Modulator type
(
Qi and Li, 2020
) and (
He et al., 2019
)
Large
Large In mm
Small
π/2
E = V/d
Large
Transvers
This work
Large
Small In μm
–
π
E = V/L
Large
Longitudinal