Welcome to LLE

The Laboratory for Laser Energetics (LLE) of the University of Rochester is a unique national resource for research and education in science and technology. LLE was established in 1970 as a center for the investigation of the interaction of intense radiation with matter. The National Nuclear Security Administration funds LLE as part of its Stockpile Stewardship Program.

Target being shot by a laser

Alumni Focus

Alumni Snapshot

Nicholas G. Usechak

Dr. Nicholas Usechak is Director of Ultrafast Photonic Devices and Research Laboratory at the U.S. Air Force Research Laboratory Wright-Patterson Air Force Base, Dayton OH. In addition to his research activities at AFRL, where he runs the Integrated Photonic Circuits team, Dr. Usechak also serves as the federal Program Manager for the American Institute for Manufacturing Integrated Photonics (AIM Photonics) and supports DARPA on a number of programs.

Users' Guide

The Omega
Laser Facility Users' Guide

is available for download here.

Quick Shot

Alt Text of the Image

Congratulations to Maria Gatu Johnson on Receiving the APS DPP Weimer Award

Maria Gatu Johnson was awarded the American Physical Society Division of Plasma Physics Katherine E. Weimer award for outstanding achievement in plasma science research by a woman physicist in the early years of her career. The award was given to her for her pioneering work in identifying flows in implosions and for determining their impact on the implosion performance, as well as using HED plasmas for studying basic nuclear science. The citation on the certificate will read as follows: "For significant contributions to Inertial Fusion Sciences and pioneering work in Stellar Nucleosynthesis through nuclear measurements." Dr. Gatu Johnson is a Research Scientist at the MIT Plasma Science & Fusion Center. She conducts research at the Omega Laser Facility and is a member of the Omega Laser Facility Users Group Executive Committee.

Past Quick Shots

Around the Lab

Tunable OMEGA P9 (TOP9)
Beam Project at LLE

In both indirect- and direct-drive inertial confinement fusion (ICF) experiments, energy can be lost or misdirected when the laser beams cross with each other on their way to the target. This phenomenon, known as cross-beam energy transfer (CBET), scatters light from one beam to another, mediated by a plasma grating, and leads to beams giving up part of their energy to other beams. Splitting the OMEGA beams into three different groups, each with a separate laser wavelength (color), has been proposed because simulations modeling wavelength detuning have shown to limit the energy transferred between beams. In fact, wavelength detuning is predicted to recover much of the drive power currently lost to CBET on OMEGA.