Design and Analysis of the Travelling Wave Electrode for High Speed Silicon Mach-Zehnder Optical Modulators
| Autor: | Chung, Wei-Lun, 鐘偉綸 |
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| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 In the past decade, a significant increase in Internet access is driven by an abundance of cloud-based storage and computing, high-definition multimedia streaming, and a lot of Internet services. This has resulted in an unprecedented demand in the speed and volume of data transmission. Compared with the electric transmission system, the optical transmission system has lower power consumption and has higher transmission speed. In order to implement a high-speed optical transmission system, designing a high-speed electro-optical modulator that is able to convert electrical signal into optical signal efficiently is an important target. In this thesis, we focus on the design and analysis of a travelling wave Si Mach-Zender modulator, where the active region is made of a L-shaped PN junction inside a waveguide for the operating wavelength near 1550 nm. Compared with different element length, different implant concentration, different MMI and the symmetric and asymmetric modulator to optimize the parameters of the MZI optical modulator. The S parameters show that the modulation bandwidths of a 1mm and a 2 mm MZI modulator are 71Gb/s and 47Gb/s respectively, with an employment of a TWE design. The 2 mm asymmetric MZI optical modulator successfully modulates the 25Gboud (50Gb/s) PAM4 signal driven by electrical PAM4. Finally, the MZI optical modulator packaged with a CMOS driver was successfully demonstrated with a modulation speed of 25Gb/s OOK optical signal. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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