| Autor: |
Hanzhi Tang, Qiang Li, Chong Pei Ho, Junichi Fujikata, Masataka Noguchi, Shigeki Takahashi, Kasidit Toprasertpong, Shinichi Takagi, Mitsuru Takenaka |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Optics Express. 30:22848 |
| ISSN: |
1094-4087 |
| DOI: |
10.1364/oe.457444 |
| Popis: |
In this work, we numerically and experimentally examined the impact of parasitic capacitance on the modulation bandwidth of a III-V/Si hybrid metal-oxide-semiconductor (MOS) optical modulator. The numerical analysis revealed that the parasitic capacitance between the III-V membrane and the Si slab should be considered to achieve high-speed modulation, particularly in the case of a thick gate oxide. We also fabricated a high-speed InGaAsP/Si hybrid MOS optical modulator with a low capacitance using a SiO2-embedded Si waveguide. The fabricated device exhibited a modulation efficiency of 0.245 Vcm and a 3 dB bandwidth of up to 10 GHz. Clear eye patterns with 25 Gbps non-return-to-zero (NRZ) modulation and 40 Gbps 4-level pulse amplitude modulation (PAM-4) were obtained without pre-emphasis. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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