< BK21 플러스 BEST 정보기술 사업단 세미나 개최 안내 >

개최일시 : 2015년 10월 14일 수요일 13:30 ~ 14:30

개최장소 : 공학원 379C

세미나 제목 : Monolithic high-speed electronic-photonic integration based on SiGe:C BiCMOS technology

발표초록 : 

Monolithic silicon electronic photonic integrated circuit (ePIC) technology enables a high degree of integration of optoelectronic sub-systems for optical communications. While monolithic electronic photonic integration leads to shrinking form-factors and reduced assembly, the question arises what electronic baseline technology is the best match to future communication system requirements? Looking beyond 100G systems, baud-rates exceeding 50GBd/s are needed for 400G transceivers, requiring very fast driving electronics. High-speed transistors are therefore a prerequisite for high-performance ePIC technology. Already today, silicon-germanium (SiGe) bipolar technologies are frequently deployed for broadband applications in high-speed discrete photonics. The key figure of merit is fT × BV, i.e. maximum transit frequency × breakdown voltage of the bipolar transistors, resulting in preferable characteristics of bipolar transistors for high-speed analog circuits. Although waveguide-based optics leads to smaller form-factors compared to discrete solutions, there are limits to downsizing of integrated photonic devices because of the wavelength of light and the available index contrast. This puts constraints on the reduction of voltage swing required to drive photonic devices such as modulators. In practice, the required voltage swing remains comparable to discrete solutions. On the other hand, complex real-time mixed signal systems requiring large digital cores are typically implemented in highly scaled CMOS technologies that provide only a limited output voltage swing. Integrating silicon photonics with high-performance SiGe bipolar technology is therefore an excellent match for high-speed analog/digital or digital/analog interfaces. SiGe-bipolar-based ePIC technology enables direct driving of integrated photonic devices by high-speed digital electronics such as advanced signal processing.

강연자 : Dr. Lazrs Zimmermann / IHP, Germany

초청자 : 전기전자공학과 교수 최우영