Upcoming Talks

Recent designs for novel infrared fiber amplifiers in all-optical unregenerated DWDM transmission circumnavigating the Earth with satellite free-space and subsea fiber lightwave systems are discussed. Practical architectures and timelines for deployment of these novel amplifiers and systems are presented. The talk will cover the following points: +Motivation for This Work +Bottom Line Up Front +Basic Elements of Lightwave Communications Systems +Key Spectral Operating Bands for IR Fiber Amplifiers +Design of 1550 nm Fiber Amplifiers for Satellite Free Space DWDM Transmission (Developed at Fibertek) +System Design for 1550 nm 40,000 km Satellite Free Space Unregenerated Transmission +Design of 2000 nm Fiber Amplifiers for Terrestrial/Subsea Fiber Optic DWDM Transmission (Developed at RET and Associates) +System Design for 2000 nm 40,000 km Fiber Optic DWDM Unregenerated Transmission +Comparison of Free Space Satellite and Fiber Optic Terrestrial/Subsea Fiber Amplifiers and All-Optical Unregenerated Transmission Systems that Circumnavigate the Earth +Conclusions and Summary

Dr. Robert E. Tench received a B.A. in Physics with High Honors from Swarthmore College in 1978 and a Ph.D. in Physics from MIT in 1985. The title of his dissertation was "Precision Studies of Atom-Field Interaction in Vapors" and his thesis supervisor was Prof. Shaoul Ezekiel of EECS and AeroAstro. His photonics and fiber optics career has involved research, development, and manufacturing at AT&T and Lucent Bell Labs, Agere Systems, the National Security Agency, Johns Hopkins University Applied Physics Laboratory, Cybel LLC, and Fibertek. He is currently President and Chief Scientist at RET and Associates LLC (www.retandassociatesllc.com). He has placed over two dozen photonics and fiber optics products into manufacture, has twelve patents granted or pending, and has published over 115 journal and conference papers.

Lean is a functional programming language that is designed to be used for theorem proving. Functions in lean which compile can be directly mapped to theorems, making the lean compiler a powerful tool for theorem verification. I will describe the basics of of lean, and build up towards the definitions and structures needed in quantum information. The particular theorem we will work towards is the security guarantee of the bb84 quantum key distribution protocol. The seminar is intended to be accessible for physicists with no prior knowledge of lean.

BSc: Victoria university of Wellington, New Zealand. MSc+PhD: Uppsala University, Sweden Postdoc: Humboldt University, Berlin, Germany Postdoc: MIT

Controlling nonlinear multimode states is a long-standing challenge in physics. While systems with high nonlinearities, such as superconducting circuits and acousto-optic systems, have successfully demonstrated precise control over quadrature-dependent behavior (such as quantum squeezing, quadrature non-reciprocity, and bosonic Kitaev chains), integrated photonics faces a unique hurdle. Specifically, the inherently weak nonlinear interactions in dielectric materials have limited the full potential of optical platforms. However, recent advances in fabricating nonlinear micro-resonators with nanometric features now allow for the enhancement of all-optical interactions, necessitating new approaches to generating, controlling, and measuring light. In this seminar, I will discuss our recent results in observing, controlling, and programming multimode quadrature-dependent Hamiltonians to enable new on-chip functionalities. I will begin by showcasing our advancements in developing integrated microresonators in thin-film 4H-Silicon Carbide. This innovation enables nonlinear photonics, quantum optics, and collective quantum emitter excitations on a single platform. Following this, I will present the experimental demonstration of a fully tunable optical dimer that exhibits complete quadrature-dependent non-reciprocity/isolation, opening the door to enhanced light-matter interactions and sensing. Finally, I will discuss the observation and control of quadrature-dependent dynamics that naturally emerge in Kerr micro-combs. Our work paves the way toward new regimes of light-matter interactions on scalable photonic microchips, with transformative implications for both fundamental physics and quantum applications.

Dr. Eran Lustig is an Assistant Professor in the Faculty of Electrical and Computer Engineering at the Technion. His primary research interests lie in optical physics and engineering, with a focus on nonlinear, multimode, topological, and time-dependent optics on various optical platforms. Dr. Lustig earned his PhD in Physics from the Technion and recently completed his postdoctoral studies at the Ginzton Laboratory at Stanford University. He is currently a Seiden Fellow in Nanotechnology and Optoelectronics and was the recipient of the IPS Asher Peres Award for Outstanding Experimental Student.