May 17, 2008


The Math-Phys-Tech Section
of the Shevchenko Scientific Society

Д-р Рома Андрушків представляє доповідача


If the exploration mission is to discover what is out there in remote and hostile environments, the tool of choice very often is a neutron probe. This talk will explain why this is so, by describing the physics behind the exploration process and the physics principles on which the design of the tool is based.

About the speaker:

Д-р Лев Чіровський

Dr. Chirovsky began his career as a nuclear physicist investigating circumstances which lead to the breakdown of basic symmetry laws on the nuclear level.

After seven years he switched fields and acquired over twenty years of experience in optoelectronics, photonics, and photonic-electronic integration. Fifteen of those years he worked at Bell Laboratories, as a Member of Technical Staff and then a Distinguished Member of Technical Staff for the last ten years.

During that time, he coordinated teams of collaborators, which produced large arrays of various kinds of optical logic devices and arrays of “Smart Pixels”, all utilized to enable demonstrations of system architectures with massively parallel optical interconnects (MPOI). These efforts culminated in the production of Si CMOS VLSI chips with hundreds of optical I/O ports integrated onto the chips via flip-chip bonding. The input devices were GaAs diode photo-detectors. The output devices were initially GaAs “Multiple Quantum Well” diode modulators.

Then Leo specially designed 980nm and 850nm VCSELs amenable to such integration for the outputs, capable of from 1 up to 10Gb/s/channel data rates. After taking an early retirement from Bell Labs, Leo joined Cielo, Inc., eventually acquired by OCP, Inc., where he managed the design team and led the development projects, which produced the world’s most advanced 1.3mm VCSELs, meeting the performance and reliability specs for various TELECOM and DATACOM routing and switching network applications. Leo joined JDSU in June, 2006 to manage the VCSEL development projects there.

A year later, he switched fields again returning to his roots, Nuclear Physics, to work on the development of advanced neutron probes. His major accomplishments include over one hundred publications, twenty U.S. patents, and an NSF Post-doctoral Fellowship. He received his Ph.D. from Columbia University and is presently a member of IEEE-LEOS, the APS, and the Shevchenko Scientific Society.