O
Oleg M. Efimov
Researcher at University of Central Florida
Publications - 15
Citations - 1092
Oleg M. Efimov is an academic researcher from University of Central Florida. The author has contributed to research in topics: Laser & Diffraction efficiency. The author has an hindex of 11, co-authored 15 publications receiving 1061 citations.
Papers
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Journal ArticleDOI
High-efficiency bragg gratings in photothermorefractive glass.
TL;DR: Bragg diffractive gratings recorded in the volume of photosensitive silicate glasses doped with silver, cerium, fluorine, and bromine recorded with photothermorefractive process observedabsolute diffraction efficiency of as much as 93% was observed for 1-mm-thick gratings with spatial frequencies up to 2500 mm(-1).
Journal ArticleDOI
Waveguide writing in chalcogenide glasses by a train of femtosecond laser pulses
Oleg M. Efimov,Leonid B. Glebov,Kathleen Richardson,E. W. Van Stryland,Thierry Cardinal,Seung Han Park,Michel Couzi,J.L. Bruneel +7 more
TL;DR: In this article, the authors used a train of femtosecond laser pulses at 850 nm, in the transparent spectral region of bulk As40S60 glasses, to write waveguides by translating the glass sample along the optical axis of a strongly focussed laser beam.
Patent
Method and apparatus for separating non-metallic substrates utilizing a laser initiated scribe
TL;DR: In this paper, an initial mechanical or pulsed laser scribing device forms a micro-crack inside the substrate that does not extend to either the upper or lower surface, and two breaking beams on opposing sides of the separation line follow the cooling stream.
Patent
High efficiency volume diffractive elements in photo-thermo-refractive glass
TL;DR: In this article, volume holographic elements were made from Bragg diffractive gratings in photo-thermo-refractive (PTR) glass with absolute diffraction efficiency ranging from greater than approximately 50% up to greater than 93% and total losses below 5%.
Patent
Process for production of high efficiency volume diffractive elements in photo-thermo-refractive glass
TL;DR: In this paper, a volume diffractive element (Bragg grating) fabrication in photosensitive silicate glasses doped with silver, cerium, fluorine, and bromine was proposed.