Waveguiding effect in electroabsorption modulators: passivation layers and their impact on extinction ratios
- Title
- Waveguiding effect in electroabsorption modulators: passivation layers and their impact on extinction ratios
- Author
- 신동수
- Keywords
- electroabsorption (EA); waveguide; passivation; extinction ratio (ER)
- Issue Date
- 2005-02
- Publisher
- ELECTRONICS TELECOMMUNICATIONS RESEARCH INST
- Citation
- ETRI JOURNAL, v. 27, No. 1, Page. 95-101
- 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.
- URI
- https://onlinelibrary.wiley.com/doi/abs/10.4218/etrij.05.0104.0053https://repository.hanyang.ac.kr/handle/20.500.11754/110220
- ISSN
- 1225-6463; 2233-7326
- DOI
- 10.4218/etrij.05.0104.0053
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
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