Waveguiding effect in electroabsorption modulators: Passivation layers and their impact on extinction ratios
- Authors
- Shin, Dong Soo
- Issue Date
- Feb-2005
- Publisher
- 한국전자통신연구원
- Keywords
- electroabsorption (EA); waveguide; passivation; extinction ratio (ER)
- Citation
- ETRI Journal, v.27, no.1, pp.95 - 101
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- ETRI Journal
- Volume
- 27
- Number
- 1
- Start Page
- 95
- End Page
- 101
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/46112
- DOI
- 10.4218/etrij.05.0104.0053
- ISSN
- 1225-6463
- Abstract
- Waveguide structures of the stand-alone electroabsorption (EA) modulator and the electroabsorption modulated laser (EML) are investigated using the 3D beam propagation method. The EA waveguide structures with InP-based passivation layers show saturation in the extinction ratio (ER) due to the stray light traveling through the passivation layers. This paper demonstrates that narrower passivation layers suppress stray-light excitation in the EA waveguide, increasing the ER A taper structure in the isolation section of the EML waveguide can reduce the mode mismatch and suppress the excitation of the stray light, increasing the ER further. Low-index-polymer passivation layers can confine the mode more tightly in the active waveguide, yielding an even higher ER.
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Collections - COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF PHOTONICS AND NANOELECTRONICS > 1. Journal Articles
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