Patent “Optical system including multiplexed volume Bragg grating, methods, and application” issued
A patent, titled “Optical system including multiplexed volume Bragg grating, methods, and application” was issued in January 2017 to Professor Leon Glebov’s and other members of his PPL research group: Brian Anderson, Ivan Divliansky, Daniel Ott, Evan Hale, and George Venus.
Abstract: A method of reversible spatial mode selection and conversion between waveguides and free space is presented using a multiplexed volume Bragg grating (MVBG). The MVBG has an inherent angular selectivity, providing different losses for different transverse modes and converting a higher order mode in waveguide to a single fundamental mode in free space. Using the device in a resonator allows for a pure higher order mode to be guided and amplified in the gain medium, to increase the mode area, to extract accumulated excitation more efficiently, and, therefore, to increase gain of the amplifier. In the same resonator, the device is able to convert the higher order mode to a high brightness Gaussian beam in free space or to a fundamental mode in a waveguide.
US 9,551,830 B1
Posted Wednesday, March 8, 2017
Professor Leon Glebov presents short course at Photonics West 2017
On Sunday, January 29, Professor Leon Glebov presented a short course titled “Volume Bragg gratings – New optical components providing unique means” at Photonics West 2017 in San Francisco, California.
This course explains basic principles and applications of volume Bragg gratings (VBGs) that are holographic optical elements recorded in volume of photo-thermo-refractive optical glass. These elements enable dramatic increase of brightness of lasers and resolution of spectral analyzers. The goal of the course is to describe features of photosensitive optical glass , properties of VBGs, principles of gratings modeling and design, main types of optical components based on VBGs, and amazing results of their use in lasers and photonic devices. People who want to bring lasers and photonic devices to a new level will benefit from taking this course.
Learning Outcomes
learn properties of holographic photo-thermo-refractive glass
identify optical beams and pulses transformations produced by different types of VBGs
describe VBGs’ applications
determine the problems that could be solved by VBGs
calculate parameters of VBGs that provide necessary functionality of laser and photonics systems
use VBGs for spectral and angular selection, pulses stretching and compression, and spectral and coherent beam combining
Posted Wednesday, March 8, 2017
Professor Leon Glebov to present Darshana and Arun Varshneya Frontiers of Glass Technology Lecture
Professor Leon Glebov will present the Darshana and Arun Varshneya Frontiers of Glass Technology Lecture at the 12th Pacific Rim Conference on Ceramic and Glass Technology meeting in Hawaii in May 2017. Dr. Glebov is a 2017 Award Speaker in the Glass & Optical Materials Division of the American Ceramic Society. The title of Dr. Glebov’s presentation is “Volume holographic elements in photo-thermo-refractive glass: features and applications.”
Abstract: This presentation summarizes the results of volume holographic elements development for spectroscopy and fine laser control that were performed by research teams of the photoinduced processing laboratory at CREOL/UCF and OptiGrate Corporation, in collaboration with numerous researchers from different countries. This survey includes mechanisms of refractive index change and origin of induced absorption and scattering in photo-thermo-refractive (PTR) glass and basics of holographic elements recording in this material. The main types of holographic optical elements recorded in PTR glass are reflecting and transmitting volume Bragg gratings (VBGs); longitudinal and transverse chirped Bragg gratings (CBGs); monolithic solid state lasers with VBGs imprinted in gain elements; tunable and achromatic holographic phase masks (HPMs); and complex holographic elements such as lenses or curved mirrors. Applications of those elements for conventional and Raman spectroscopy, spectral and angular mode selection in different types of lasers, mode conversion by complex VBGs and holographic phase masks, spectral and coherent beam combining, ultrashort laser pulses stretching, compression and shaping, and monolithic solid state lasers with distributed Bragg reflector (DBR) and distributed feedback (DFB) are described.
Posted Wednesday, March 8, 2017
A patent entitled “Production of high efficiency diffractive and refractive optical elements in multicomponent glass…” was issued by the US Patent Office to Dr. Glebov and other members of his PPL group.
Production of high efficiency diffractive and refractive optical elements in multicomponent glass by nonlinear photo-ionization followed by thermal development
Abstract: Apparatus, methods and systems for production of high efficiency refractive and diffractive elements by providing a photo-sensitizer free multicomponent glass, exposing the multi component glass to pulsed laser radiation to produce refractive indexed modulation, and heating the exposed multicomponent silicate glass to produce the high efficiency refractive and diffractive elements. The pulsed laser radiation is infrared femtosecond pulses to ultraviolet nanosecond pulses which provide ionization of glass matrix. The multicomponent glass is a photosensitive glass with high transparency in ultraviolet spectral region, e.g. silicate glass which includes silver, fluorine and bromine and does not contain photosensitizers such as cerium and antimony, PTR glass, cerium free PTR glass and cerium+antimony free PTR glass.
US Patent Office website
Posted Friday, May 31, 2013
Leon Glebov and Optigrate Featured in Orlando Sentinel
Central Florida gains from laser hiring
Leonid Glebov stands amid the beams, wires and metal studs of what will soon be the new home of OptiGrate Corp., the laser-optics company he helped found more than a dozen years ago
OptiGrateIt will be a big move for the small business, the laser scientist said last week as he checked on the construction’s progress. Until now, the company has been a tenant in Central Florida Research Park as part of the University of Central Florida’s business incubator.
OptiGrate will nearly double its space when it moves into the new, 10,000-square-foot facility in Oviedo. Its expansion, Glebov said, is driven by growing sales of its tiny electro-optic components, used in everything from military communications gear to medical equipment.
“I won’t say we’ll double our employees in a year — no, not that fast,” said Glebov, an award-winning UCF physicist who immigrated from Russia in the mid-1990s and became a U.S. citizen a few years ago. “We expect growth to be steady as our sales increase. This is all very exciting.”
Posted Tuesday, April 24, 2012
Dr. Leon Glebov’s Company Optigrate Featured in UCF News
A focus on helping emerging businesses succeed has fueled research growth. Optigrate, a company in UCF’s incubation program, was founded by Professor Leon Glebov (left).
From UCF News By Barb Abney, Sept. 7, 2010
The University of Central Florida pumped more than $1 billion into the local economy in the past 11 years thanks to cutting-edge researchers in engineering, education, medicine and many other fields.
UCF researchers were awarded a record $133.3 million in external research funding in 2009-10.
The impact of those research dollars fuels and diversifies Central Florida’s innovation economy. Many researchers take their projects from the lab to the marketplace, creating new jobs and sometimes enticing companies to move to or expand in Central Florida.
Findings from UCF research have improved medical treatments and the way children learn in the classroom. They also help to preserve the environment and protect communities from hurricanes.
“UCF is a proven economic engine for our community,” said M.J. Soileau, vice president for Research and Commercialization. “The hard work and dedication of our world-class researchers creates high-tech, high wage jobs and improves our quality of life.”
Research highlights in 2009-10 include:
UCF received $75.8 million in federal funding, a key indicator of strength for universities nationwide. That represents a 27 percent increase over last year’s total, and it includes $28.7 million in funding from federal stimulus dollars.
A record 41 UCF researchers earned $1 million or more in grants.
UCF’s Florida Solar Energy Center led all UCF colleges and institutes with a record $21.2 million, including $10 million for a program that will equip schools with energy-efficient roofs.
A stronger focus on commercializing research — including new programs that help emerging businesses succeed and grow during their early years — has fueled UCF’s growth in research during the past 11 years.
Since it was established in 1999, UCF’s Business Incubation Program has helped develop 100 companies and is credited with contributing more than $200 million in overall economic impact. The program helps new companies, many of which are strongly tied to UCF research, overcome the many challenges businesses often face in their first few years.
GrowFL, a companion program established by the Legislature in 2009, helps more developed companies grow and also is administered by UCF’s Office of Research and Commercialization. In its first year, GrowFL helped 100 companies create 320 new jobs.
“We are seeing technology developed at UCF lead to the formation of Central Florida companies and jobs, and we’re also seeing more national recognition for the strength of our research,” said Tom O’Neal, associate vice president for research, executive director of the UCF Business Incubation Program and administrator of the GrowFL technical assistance program.
The power of patents earned by UCF researchers has been ranked by two independent sources as among the 10 strongest in the nation. IEEE, the world’s largest professional association for the advancement of technology, ranks UCF third behind the system-wide institutions of the University of Texas and the University of California.
UCF ranked eighth in the Patent Scorecard for universities issued by the Patent Board and published this month in Intellectual Property Today. UCF joined MIT, the California Institute of Technology and the universities of California, Texas and Illinois in the top 10.
Posted Tuesday, September 7, 2010
Leon Glebov awarded $1.8M DARPA contract for ADHELS Phase 2
Leon Glebov (together with Mike Bass, Aristide Dogariu, and Boris Zeldovich) have received a contract from DARPA (ADHELS Phase 2) totaling $1.8M for research on “High brightness multiwavelength laser architectures based on volume diffractive gratings in PTR glass.” Phase II of ADHELS aims to generate high power, high spatial brightness laser beams of military interest by spectrally combining the beams of high power, high efficiency, and single-mode fiber lasers.
Posted Thursday, June 4, 2009
Leon Glebov Wins 2008 SPIE Dennis Gabor Award
Congratulations to Leon Glebov for winning this year’s Dennis Gabor Award from the SPIE – one of it’s highest honors. The Dennis Gabor Award is presented annually in recognition of outstanding accomplishments in diffractive wavefront technologies, especially those which further the development of holography and metrology applications.
Congratulations to Leon Glebov and all of his students, postdocs and collaborators. This truly does keep CREOL in the limelight.
Posted Tuesday, February 12, 2008
Leon Glebov elected Fellow of the OSA
Leon Glebov elected Fellow of the OSA “for the discovery of photo-thermal refractive glass as a new medium for recording high-efficiency volume holographic gratings and pioneering studies of photo-ionization physics of pure and doped glasses. He will receive the honor at OFC/NFOEC.
Posted Saturday, December 8, 2007