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Journal Article
1.3-µm identical active electro-absorption modulated laser with quantum well intermixed passive waveguide
- Authors
- Seungchul Lee, Namje Kim, Miran Park, O-Kyun Kwon
- Issue Date
- 2024-01
- Citation
- Optics Express, v.32, no.3, pp.3278-3289
- ISSN
- 1094-4087
- Publisher
- Optica Publishing Group
- Language
- English
- Type
- Journal Article
- Abstract
- Quantum well intermixing (QWI) is an effective method for simple and well-defined monolithic integration of photonic devices. We introduce an identical-active electro-absorption modulated laser (IA-EML) with optimized QWI, which is applied to reduce the absorptive waveguide region. To determine the optimal intermixed IA-EML structure, we conduct a comparative analysis between the cases of an IA-EML with only an intermixed waveguide region and with both intermixed waveguide and electro-absorption modulator (EAM) regions, as well as the case without QWI. The results reveal that the intermixed region effectively inhibits the absorption in the waveguide. In particular, the IA-EML with only waveguide intermixing exhibits superior modulation characteristics with low driving voltages and a high extinction ratio. Our work provides an attractive approach for suppressing the absorptive waveguide region in the IA-EML to enhance modulation performance and to develop photonic integrated circuits with a simplified process.
- KSP Keywords
- Comparative analysis, Electro-absorption modulator(EAM), Extinction ratio(ER), High extinction ratio, Integrated circuit(IC), Modulated laser, Modulation performance, Monolithic Integration, Quantum Well Intermixing(QWI), Well-defined, photonic devices
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