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Silicon Photonics Components for Energy-Efficient Optical Interconnects.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Silicon Photonics Components for Energy-Efficient Optical Interconnects./
作者:	Mohammed, Zakriya.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	148 p.
附註:	Source: Dissertations Abstracts International, Volume: 84-07, Section: B.
Contained By:	Dissertations Abstracts International84-07B.
標題:	Optics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30244045
ISBN:	9798368451305

Silicon Photonics Components for Energy-Efficient Optical Interconnects.
Mohammed, Zakriya.

Silicon Photonics Components for Energy-Efficient Optical Interconnects. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 148 p.

Source: Dissertations Abstracts International, Volume: 84-07, Section: B.

Thesis (Ph.D.)--New York University Tandon School of Engineering, 2023.

With the recent advances in many-core processors (MCPs) and systems-on-chip integration, modern microprocessors have shifted toward parallel computing. Also, high-performance computing systems will soon need input/output (I/O) circuits with total bandwidths in the TB/s (terabits per second) class. However, in traditional electrical I/Os, power dissipation has imposed significant limitations on the transmitted data rates that can be supported per channel and has restricted the microprocessors' clock frequency to 4-5 GHz. Because of this, energy-efficient optical interconnects have been suggested as an alternative way to solve the problem of electrical IOs' limited bandwidth. Optical communication has been widely used for long-distance and high-speed data networks. They make up the great majority of communication lines, from long-haul (500 km-6000 km) to metro (10 km-500 km).To achieve a TB/s aggregate I/O bandwidth while simultaneously maintaining energy efficiency in transmission, an integrated platform such as silicon photonics (SP) technology is considered a highly viable choice. High-speed optical transceivers (transmitters/receivers) with significant integration densities and low manufacturing costs can be realized using silicon photonic integrated circuits (PICs). This platform offers compatibility with the mainstream complementary metal-oxide-semiconductor (CMOS) processes and provides a wide variety of optical modules that can efficiently transform electrical data streams into the optical domain. For example, SP micro-ring optical modulators have already been shown to exhibit energy-efficient optical modulation with a compact footprint and low control voltage requirements. Additionally, high-responsivity and bandwidth germanium photodiodes have been demonstrated that can detect a high-speed optical data stream and efficiently convert it back to the electrical domain.Scaling the I/O bandwidths to TB/s will be required sooner than expected to fulfill the ever-increasing communication bandwidth demand driven by the big data era. In the meantime, massive data access from an increasing number of end-users and terminals is driving up energy usage at a greater rate. Therefore, silicon photonics transmitters should deliver greater energy efficiency per transmitted bit to meet those needs. This dissertation aims to investigate the primary factors that can improve the energy efficiency of SP links. The goal is to develop optical components that can significantly lower the power budget requirements.The optical loss in various SP components that form the optical link is the main contributor to the overall power usage, hence a higher power budget. In silicon photonics transceivers, one of the primary difficulties is reducing the laser power, where the number of channels is also proportional to the number of wavelength sources. In addition, the performance of silicon photonic devices is sensitive to temperature variations due to the silicon's high thermo-optic coefficient (TOC). Due to this vulnerability, regulating the ambient temperature is another major source of power consumption. Additionally, the high mode confinement factor in the rectangular silicon waveguides' cross-sections leads to a strong polarization dependency, causing additional polarization-dependent losses. This is especially problematic at the SP receiver, where polarization dependence must be compensated for by increasing the laser optical power or using polarization diversity schemes.In this dissertation, to realize low-power and high-speed optical links, a passive athermal Mach-Zehnder interferometer (MZI) filter that does not require active thermal management is developed. The MZI is a key building block used in various silicon photonic devices. Additionally, hybrid multiplexed devices (wavelength and mode multiplexers) are employed to demonstrate the transmission of multiple data channels over a multimode waveguide using a single wavelength source. This technique increases the number of transmitted channels per laser, hence improving the laser's efficiency and reducing the wavelength requirements. Furthermore, at the receiver end, a novel high-performance and ultra-low-loss polarization splitter rotator (PSR) has been designed and demonstrated. Collectively, all these components can dramatically reduce power consumption, thereby improving the overall energy efficiency of the silicon photonic link.

ISBN: 9798368451305Subjects--Topical Terms:

517925
Optics.
Subjects--Index Terms:

Athermal design

Silicon Photonics Components for Energy-Efficient Optical Interconnects.
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300 $a 148 p.
500 $a Source: Dissertations Abstracts International, Volume: 84-07, Section: B.
500 $a Advisor: Rasras, Mahmoud.
502 $a Thesis (Ph.D.)--New York University Tandon School of Engineering, 2023.
520 $a With the recent advances in many-core processors (MCPs) and systems-on-chip integration, modern microprocessors have shifted toward parallel computing. Also, high-performance computing systems will soon need input/output (I/O) circuits with total bandwidths in the TB/s (terabits per second) class. However, in traditional electrical I/Os, power dissipation has imposed significant limitations on the transmitted data rates that can be supported per channel and has restricted the microprocessors' clock frequency to 4-5 GHz. Because of this, energy-efficient optical interconnects have been suggested as an alternative way to solve the problem of electrical IOs' limited bandwidth. Optical communication has been widely used for long-distance and high-speed data networks. They make up the great majority of communication lines, from long-haul (500 km-6000 km) to metro (10 km-500 km).To achieve a TB/s aggregate I/O bandwidth while simultaneously maintaining energy efficiency in transmission, an integrated platform such as silicon photonics (SP) technology is considered a highly viable choice. High-speed optical transceivers (transmitters/receivers) with significant integration densities and low manufacturing costs can be realized using silicon photonic integrated circuits (PICs). This platform offers compatibility with the mainstream complementary metal-oxide-semiconductor (CMOS) processes and provides a wide variety of optical modules that can efficiently transform electrical data streams into the optical domain. For example, SP micro-ring optical modulators have already been shown to exhibit energy-efficient optical modulation with a compact footprint and low control voltage requirements. Additionally, high-responsivity and bandwidth germanium photodiodes have been demonstrated that can detect a high-speed optical data stream and efficiently convert it back to the electrical domain.Scaling the I/O bandwidths to TB/s will be required sooner than expected to fulfill the ever-increasing communication bandwidth demand driven by the big data era. In the meantime, massive data access from an increasing number of end-users and terminals is driving up energy usage at a greater rate. Therefore, silicon photonics transmitters should deliver greater energy efficiency per transmitted bit to meet those needs. This dissertation aims to investigate the primary factors that can improve the energy efficiency of SP links. The goal is to develop optical components that can significantly lower the power budget requirements.The optical loss in various SP components that form the optical link is the main contributor to the overall power usage, hence a higher power budget. In silicon photonics transceivers, one of the primary difficulties is reducing the laser power, where the number of channels is also proportional to the number of wavelength sources. In addition, the performance of silicon photonic devices is sensitive to temperature variations due to the silicon's high thermo-optic coefficient (TOC). Due to this vulnerability, regulating the ambient temperature is another major source of power consumption. Additionally, the high mode confinement factor in the rectangular silicon waveguides' cross-sections leads to a strong polarization dependency, causing additional polarization-dependent losses. This is especially problematic at the SP receiver, where polarization dependence must be compensated for by increasing the laser optical power or using polarization diversity schemes.In this dissertation, to realize low-power and high-speed optical links, a passive athermal Mach-Zehnder interferometer (MZI) filter that does not require active thermal management is developed. The MZI is a key building block used in various silicon photonic devices. Additionally, hybrid multiplexed devices (wavelength and mode multiplexers) are employed to demonstrate the transmission of multiple data channels over a multimode waveguide using a single wavelength source. This technique increases the number of transmitted channels per laser, hence improving the laser's efficiency and reducing the wavelength requirements. Furthermore, at the receiver end, a novel high-performance and ultra-low-loss polarization splitter rotator (PSR) has been designed and demonstrated. Collectively, all these components can dramatically reduce power consumption, thereby improving the overall energy efficiency of the silicon photonic link.
590 $a School code: 1988.
650 4 $a Optics. $3 517925
653 $a Athermal design
653 $a Hybrid multiplexers
653 $a Optical interconnects
653 $a Polarization diversity
653 $a Silicon photonics
653 $a Transceivers
690 $a 0752
710 2 $a New York University Tandon School of Engineering. $b Electrical & Computer Engineering. $3 3694303
773 0 $t Dissertations Abstracts International $g 84-07B.
790 $a 1988
791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30244045