University of Central Florida Research Foundation, Inc.

Optigrate Corporation

Boris Zeldovich

Leonid B Glebov

Vadim Smirnov

Julien Lumeau

Sergiy Mokhov

Almantas Galvanauskas

Ivan Divliansky

Eugeniu Rotari

Bahaa Saleh

Larissa Glebova

Evan Hale

Oleksiy Andrusyak

A phase converting device capable of use over a broad wavelength range, which may be used for optical beam transformations and combining, conversion of resonator and waveguide modes, correction of aberrations in optical systems, and selection of photons with specific phase profile. This provides significant advantages in high power laser systems. Large-mode-area fibers can be used to provide higher incident powers than can be achieved by single-mode fibers, reducing the number of elements in a system necessary to achieve the desired output. The profiles of these LMA fiber modes can then be converted from the undesired modes into the desired mode while combing their total power into a single beam.

Achromatic holographic phase masks, methods, and applications

Complex spectral and angular diffractive optical elements in photosensitive materials based on Moir&#xe9; pattern are proposed and demonstrated. The process is based on the recording of multiple volume Bragg gratings with controlled difference of the periods in the same volume of photosensitive material. Filters with ultra-narrow bandpass in the range of a few picometers to a few tens of picometers or apodized diffractive optical elements across large aperture are demonstrated. Several methods to fabricating such Moir&#xe9; Bragg gratings are proposed. Experimental demonstration of a Moir&#xe9; ultra-narrowband diffractive optical element in PTR glass is performed.

Volume Moir&#xe9; Bragg gratings in a photosensitive material

Recent invention of longitudinally chirped volume Bragg gratings has dramatically changed a design of high power femtosecond lasers. Replacing of bulky pairs of conventional surface gratings with compact and robust chirped volume Bragg gratings for stretching and compression of laser pulses in chirped-pulse-amplification systems enabled decrease of size and weight of those systems by several times. The methods and devices enable substantial increase of stretching time and compression to shorter pulses, enhancement of stretched and compressed beams quality by stationary or dynamic shaping of gratings, and shaping of laser pulses in both temporal and spectral domains.

Laser pulse temporal, spectral and spatial shaping devices based on volume diffractive gratings with spatially variable parameters

Growing community of inventors

Orlando, FL, United States of America

Boris Zeldovich