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

Bedros Afeyan

Bedros Afeyan earned his B.S. degree in Electrical Engineering from Concordia University, Montreal, Quebec, Canada in 1980. He then earned a Masters and a Ph.D. in Theoretical Plasma Physics from the University of Rochester working at LLE on modeling laser–plasma interaction problems. His thesis advisors were Edward A. Williams, head of the Plasma Theory group at LLE, and Prof. Albert Simon.

Users' Guide

The Omega
Laser Facility Users' Guide

is available for download here.

Quick Shot

Coatings Developed for Use in a
Short-Pulse Laser System

Shown in the inset and inside a circular containment housing of the Optical Manufacturing's 54-in. coating vacuum chamber are two 5-in. × 6-in. optics coated with a broadband-enhanced metal reflector (BEMR) film. This BEMR coating contains a metal layer of copper and gold, which gives the coater and optic the gold to rose color. Dielectric layers are deposited over the metal (alumina, hafnia, and silica) to improve the overall laser-damage threshold of the component. The resulting BEMR coating has a large spectral bandwidth, low group-delay dispersion, and little stress-induced wavefront distortion. The BEMR coating was developed for use in a short-pulse transport laser system.

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.