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

Celebrating Nobel Laureate and University
of Rochester Alumna Donna Strickland

Donna Strickland, UR '89 Ph.D. and 2018 Nobel Prize Laureate in Physics, is honored by her alma mater. Shown top left, Strickland receives the University's Eastman Medal from President Richard Feldman. The Eastman Medal recognizes individuals whose achievements and service embody the University's highest ideals and is named for George Eastman, the University's major benefactor and one of the nation's great champions of higher education. Shown top center, from left, University President Richard Feldman, Donna Strickland, and U.S. Representative Joe Morelle, celebrate at the University's annual Commencement dinner. Congressman Morelle made a statement on the House of Representatives floor recognizing Donna Strickland, her advisor, Gérard Mourou, and the University's Laboratory for Laser Energetics for their 2018 Nobel Prize in Physics. The statement was inserted in the Congressional Record and a framed version was personally presented to Strickland at the event during Commencement weekend. Shown top right, Dr. Strickland gives the commencement address at the college graduation ceremony. Below, Dr. Strickland joins LLE staff for a group photo in a visit to the laboratory.

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.