Fiber Optic Testbed By Omar Acosta qv Abstract In this project, the Electrical Engineers at Sonoma State University and I designed a fully functional automated multimode optical fiber transceiver testbed. Utilizing LabVIEW, the team was successfully able to develop a graphical user interface which permits the user to test and characterized the optical fiber transceiver sensitivity and timing margin at the push of a button. There are multiple sections of the GUI, one of which is customized for pass/fail industry testing and another to focuses on characterization for research purposes. To assist and educate the user, there are descriptive tooltips which describes what each control does and what each plot represents. Moreover, there is also a quick start guide and a manual. The computer running LabView communicates with the equipment via a GPIB daisychain. All the data generated by the testbed can also be exported to a spreadsheet for further analysis or future reference. Introduction Optical fiber system testing is a common need in research, education, and industry. In industry, optical fiber communications are quickly becoming the preferred industry standard over the current twisted pair ethernet cable. However, it is arguable whether laying the infrastructure for long haul fiber systems is going to be profitable any time in the near future. That is why we are focusing on short-range data center fiber systems. 77% of total internet traffic actually takes place within data centers, 9% from data center to datacenter, and only 14% from data center to end user. Current data center traffic was estimated to be 4.7 ZB annually in 2015 and is predicted to reach 15.3 ZB by 2020, increasing more than 3-fold.[1] So, there is a growing need for faster and faster data transfer technology there. Fiber Optical Cable Optical systems operate from the UV through to the infrared. Optical fibers became possible with the practical understanding of Snell’s law. Light transitioning between transparent materials mater bends in proportion to the change in its velocity. The ratio of the velocity differences can be measured in the refractive index. The fiber optic usually have one core and one cladding along with a protective coating that are made of quartz glass (because of its purity). Some materials called dopants are added into the glass such as P, Ge, F, Ce, B, Al to change the refractive index to emulate the bent rod effect. We utilized two types of cables single and multi. For the single mode, the core size is small enough to only allow the passage of one wavelength (λ). For the multi, the core size is large so the multiple wavelengths (λ) of light can enter by a variety of angles . Single, d= 3µm 10 -6 / 98µm Multi, d= 50 µm 10 -6 / 150 Motivation Fiber optic testing is a complex process combined of software, hardware, and firmware. The goal has been to take this complicated process and creating it usable for a wide range of users; i.e. educational,research, and industry. Without an automated test system, someone would need to become familiar with each piece of test equipment before being able to do any testing. Cohesively, the team has taken all of these problems and turned them into an interactive, intuitive, and easy to use graphical user interface. Bridging the gap between an ever growing market and the many interested testers has been the focus of creating and designing this optic fiber testbed. Acknowledgements Electrical engineers students: Joe Nolan, Miah Crockett, & Nader Srouji Advisor: Dr. Brendan Hamel-Bissell Keysight Technology Sonoma State University

Fiber Optic Testbed...Fiber Optic Testbed By Omar Acosta qv Abstract In this project, the Electrical Engineers at Sonoma State University and I designed a fully functional automated

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Fiber Optic TestbedBy Omar Acosta

Abstract In this project, the Electrical Engineers at Sonoma State University and I designed a fully functional automated multimode optical fiber transceiver testbed. Utilizing LabVIEW, the team was successfully able to develop a graphical user interface which permits the user to test and characterized the optical fiber transceiver sensitivity and timing margin at the push of a button. There are multiple sections of the GUI, one of which is customized for pass/fail industry testing and another to focuses on characterization for research purposes. To assist and educate the user, there are descriptive tooltips which describes what each control does and what each plot represents. Moreover, there is also a quick start guide and a manual. The computer running LabView communicates with the equipment via a GPIB daisychain. All the data generated by the testbed can also be exported to a spreadsheet for further analysis or future reference.

IntroductionOptical fiber system testing is a common need in research, education, and industry. In industry, optical fiber communications are quickly becoming the preferred industry standard over the current twisted pair ethernet cable. However, it is arguable whether laying the infrastructure for long haul fiber systems is going to be profitable any time in the near future. That is why we are focusing on short-range data center fiber systems. 77% of total internet traffic actually takes place within data centers, 9% from data center to datacenter, and only 14% from data center to end user. Current data center traffic was estimated to be 4.7 ZB annually in 2015 and is predicted to reach 15.3 ZB by 2020, increasing more than 3-fold.[1] So, there is a growing need for faster and faster data transfer technology there.

Fiber Optical Cable Optical systems operate from the UV through to the infrared.Optical fibers became possible with the practical understanding of Snell’s law. Light transitioning between transparent materials mater bends in proportion to the change in its velocity. The ratio of the velocity differences can be measured in the refractive index. The fiber optic usually have one core and one cladding along with a protective coating that are made of quartz glass (because of its purity). Some materials called dopants are added into the glass such as P, Ge, F, Ce, B, Al to change the refractive index to emulate the bent rod effect. We utilized two types of cables single and multi. For the single mode, the core size is small enough to only allow the passage of one wavelength (λ). For the multi, the core size is large so the multiple wavelengths (λ) of light can enter by a variety of angles .Single, d= 3µm 10-6 / 98µmMulti, d= 50 µm 10-6 / 150

Motivation Fiber optic testing is a complex process combined of software, hardware, and firmware. The goal has been to take this complicated process and creating it usable for a wide range of users; i.e. educational,research, and industry. Without an automated test system, someone would need to become familiar with each piece of test equipment before being able to do any testing. Cohesively, the team has taken all of these problems and turned them into an interactive, intuitive, and easy to use graphical user interface. Bridging the gap between an ever growing market and the many interested testers has been the focus of creating and designing this optic fiber

testbed.

Acknowledgements Electrical engineers students: Joe Nolan, Miah Crockett, & Nader SroujiAdvisor: Dr. Brendan Hamel-BissellKeysight TechnologySonoma State University