School of Physical Sciences

Dr. George Dobre

george
Lecturer in Applied Optics
Phone: 3234 Email:g.dobre

Biography

George Dobre was born in 1970 in Bucharest, Romania. He arrived in the UK in 1991 under a student exchange scheme and obtained his BSc in Physics from the University of Kent in 1993 winning the Edward A. Lamb Prize for the best student in the Faculty of Natural Sciences. He continued his postgraduate studies at this institution where supervised by Prof David A. Jackson he gained experience in fibre optic sensors and low coherence interferometry applied to distance measurements, leading to the micron-scale imaging of tissue layers in the living human retina. As a postdoctoral researcher in the late 1990's he worked on fibre optic sensors for pressure and proximity for civilian aircraft as well as optical rangefinders, fibre sensors for high pressure for offshore oil drilling and structural health monitoring, followed by a return to more work on high-resolution retinal imaging. In this field, together with Dr Adrian Podoleanu, George has pioneered en face imaging, a novel concept related to the self-modulation of interferometric images caused by scanning a beam across a target. He obtained his PhD from the University of Kent and subsequently became a lecturer at this institution where he teaches and continues to conduct research on novel techniques in Optical Coherence Tomography (OCT) and fluorescence imaging.

Expertise

Dr George Dobre's background is in Applied Optics and particularly Optical Coherence Tomography. Since contributing to the development of en face OCT techniques in the 1990s he embarked on further extending the functionality of en-face imaging instruments and demonstrated novel high resolution optical configurations, devised multi-interferometer configurations and evaluated OCT imaging with adjustable depth resolution. He was also involved in Kent AOG's collaborative activity of extending the applications of en-face OCT to the study of other tissue and outside the medical field, such as in art conservation.

> Work supported by the ARIBA foundation of the New York Eye and Ear Infirmary enabled Dr George Dobre to assemble and test in 2004 an OCT system with multiple capabilities, enabling the acquisition for the first time of simultaneous OCT and Indocyanine Green angiography of the living human eye.

Subsequent studies on the combination of OCT and fluorescence maximise contrast in each channel. More recently available broadband sources for OCT could also play a role alongside existing superluminesent diode technology, which needs to be evaluated in the context of designing new fibre configurations that can support such broadband optical sources and eventually multi-spectral fluorescence imaging.

Current projects led by Dr George Dobre include the investigation of Fourier Domain OCT (FD-OCT) measurements with light from a supercontinuum fibre source in a broad band spanning a wavelength range from 0.45 to 1.7 microns. This is carried out by an EPSRC-funded Postdoctoral Research Associate, Ramona Cernat.

Publications

Also view these in the Kent Academic Repository

Conference or workshop item
Everson, M., Duma, V. and Dobre, G. (2017). Geometric & Radiometric Vignetting Associated with a 72-Facet, Off-Axis, Polygon Mirror for Swept Source Optical Coherence Tomography (SS-OCT). in: TIM15-16 Physics Conference. IOP Institute of Physics. Available at: http://dx.doi.org/10.1063/1.4972382.
Everson, M., Duma, V. and Dobre, G. (2017). Optical power transmission in a polygon mirror-based swept source optical coherence tomography system. in: Digital Optical Technologies 2017 Bernard C. Kress; Wolfgang Osten; H. Paul Urbach. Bellingham, USA, pp. 1033520-1033520. Available at: http://dx.doi.org/10.1117/12.2270256.
Hu, Y. and Dobre, G. (2017). Performance comparison of spectrometer based and swept source based phase sensitive optical coherence tomography. in: Optical Coherence Imaging Techniques and Imaging in Scattering Media II. Bellingham, USA: SPIE. Available at: http://dx.doi.org/10.1117/12.2279879.
Kress, B. et al. (2017). Optical power transmission in a polygon mirror-based swept source optical coherence tomography system. in: World of photonics congress, digital optical technologies. Society of Photo-optical Instrumentation Engineers, p. . Available at: https://doi.org/10.1117/12.2270256.
Duma, V. et al. (2016). Handheld scanning probes for Optical Coherence Tomography: Developments, applications and perspectives. in: Todea, C. C., Podoleanu, A. G. H. and Duma, V. -F. eds. Fifth Congress of the World Federation for Laser Dentistry and Sixth International Conference on Lasers in Medicine. Bellingham, Washington, United States: SPIE Society of Photo-Optical Instrumentation Engineers. Available at: http://dx.doi.org/10.1117/12.2178590.
Showing 5 of 105 total publications in KAR. [See all in KAR]

 

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Last Updated: 31/07/2015