Tigran Galstian


Contact via Laval University


Key Research Areas
Associated Researchers
Associated Organizations

Recent Research Projects

Cristaux liquides et biophotonique comportementale

2014/15-2019/20 • $1,200,000 • PI
No summary

SPG-ANR PROTEus project: PRinting of exOTic multi-maTErials fibers

2017/18-2019/20 • $571,000 • PI,CO
The recent Photonics boom, with applications in different sector from health to telecommunication or security, generates new horizons but also tremendous challenges to undertake. The PROTEus project focuses on 3D laser printing and multi-materials multifunctional fibers, combining glass,...

Actionnement et contrôle optique de matériaux hybrides photoactifs nanostructurés multifonctionnels

2017/18-2019/20 • $456,000 • PI,CO
The ATONAL project aims at developing micro- and nano-structured functional systems that can be opticallytuned, by exploiting the photoswitching properties of materials containing photochromic molecules such asazobenzene derivatives. In recent years, new approaches have emerged, in the field of...

Smart, adaptive, and autonomous sensing

2019/20 • $300,000 • PI,CO
adaptive,autonomous,environment,mental health,multimodality,nutrition,optical sensing,real-time,smart

Développement des systèmes biomédicaux à la base des cristaux liquides

2016/17-2019/20 • $132,000 • PI
Liquid crystal (LC) materials have gone through an extraordinary journey evolving from exotic and fascinating materials to an industry of flat panel LC displays amounting to $100 Billion / year. The main physical mechanism of this transformation is their sensitivity to the electric field...

Smart, adaptive and autonomous sensing

2017/18-2018/19 • $450,000 • PI,CO
No summary

Application of a variable liquid crystal lens to 3D digitization

2017/18 • $25,000 • PI
The current proposal aims the development and fabrication of electrically variable liquid crystal lenses for 3Ddigitization. Namely, this type of lenses already has been successfully applied to mobile (cell phone) camerasto perform auto focus function without mechanical movements. In the same...

Plasma-assisted Laser Deposition for Advanced Surfaces and Innovative Materials

2016/17 • $149,984 • PI,CO
Advanced materials, engineered surfaces and tailored interfaces are becoming the key factors for generating and pushing innovation in a number of fields, including biomedical, industrial, chemical, mechanical, pharmaceutical, and optical thus guaranteeing competitiveness and impacting the...

Prototype de capteur de température à fibre optique

2016/17 • $124,000 • PI
Le présent projet vise à fabriquer un prototype transportable d'un capteur de température à base de fibre optique monomode et tout diélectrique. Ce capteur sera ainsi insensible aux interférences électromagnétiques (premier avantage). Ce capteur sera une alternative aux capteurs de température à...

Nano structured guest-host surface polymer stabilized liquid crystals

2011/12-2015/16 • $240,000 • PI
Surface interactions play paramount role in fundamental and applied physics, chemistry and biology. Particularly important are surface orientational molecular interactions that allow, for example, the alignment of liquid crystals and the operation of corresponding displays. In the present...

Development of innovative fiber lasers for biomedical, industrial and defense & security applications

2012/13-2014/15 • $577,016 • PI,CO
Fiber lasers, along with laser diodes, have greatly contributed to the development of a new generation of laser sources as well as their applications in virtually every sector of human activity. In the manufacturing sector, quasi diffraction-limited ytterbium fiber laser sources with output...

Optical guidance during neurosurgery for deep brain stimulation electrode implantation in the treatment of Parkinson's disease

2012/13-2014/15 • $265,000 • PI,CO
Deep brain stimulation (DBS) surgery is a therapeutic avenue for late-stage Parkinson's disease patients who do not respond anymore to standard medication (L-Dopa). The surgery consists in the insertion of an electrode in the subthalamic nucleus (STN), a millimeter-sized region of the brain...

Optical guidance during neurosurgery for deep brain stimulation electrode implantation in the treatment of Parkinson's disease

2012/13-2014/15 • $265,000 • PI,CO
Deep brain stimulation (DBS) surgery is a therapeutic avenue for late-stage Parkinson's disease patients who do not respond anymore to standard medication (L-Dopa). The surgery consists in the insertion of an electrode in the subthalamic nucleus (STN), a millimeter-sized region of the brain...

Nano structured guest-host surface polymer stabilized liquid crystals

2010/11 • $32,000 • PI
Surface interactions play paramount role in fundamental and applied physics, chemistry and biology. Particularly important are orientational molecular interactions that allow, for example, the alignment of liquid crystals and the operation of corresponding displays. In the present project, we...

Patents

ELECTRICALLY VARIABLE FOCUS POLYMER-STABILIZED LIQUID CRYSTAL LENS

A variable focus liquid crystal lens includes a nematic liquid crystal/monomer mixture having a spatially inhomogenous polymer network structure, and an electrode for applying a substantially uniform voltage to the nematic liquid crystal/monomer mixture. The lens is created within a cell by applying a substantially uniform electric field to the nematic liquid crystal/monomer mixture within the cell, while simultaneously irradiating the nematic liquid crystal/monomer mixture using a laser...
Related applications: CA20042470493

METHOD AND APPARATUS FOR SPATIALLY MODULATED ELECTRIC FIELD GENERATION AND ELECTRO-OPTICAL TUNING USING LIQUID CRYSTALS

A variable optical device for controlling the propagation of light has a liquid crystal layer (1), electrodes (4) arranged to generate an electric field acting on the liquid crystal layer, and an electric field modulation layer (3,71) arranged between the electrodes and adjacent the liquid crystal layer for spatially modulating said electric field in a manner to control the propagation of light passing through said optical device. The electric field modulation layer has either an optical...
Related applications: CA20072644024, WO2007CA00335

SURFACE PROGRAMMING METHOD AND LIGHT MODULATOR DEVICES MADE THEREOF

A liquid crystal display or other light modulator is provide with an alignment layer with a pretilt that is better than is currently available with rubbing technology. The liquid crystal cell consumes less electrical power to operate. The pretilt can be programmed using suitable field and recorded in the alignment layer.
Related applications: WO2009CA00951

FIBER-OPTIC THERMOMETER

A fiber-optic thermometer probe has an optical fiber with a sensing portion, namely a region of reduced cladding thickness coated with a temperature-dependent refractive index material to provide variations in propagated light power upon changes in temperature in a vicinity of the sensing portion. A reflective interface optically coupled to a core of the optical fiber reflects light propagated therein. The sensing portion can be the tip and prepared by etching using a dipping process.
Related applications: WO2014CA50519, EP20140807476, CA20142987922

METHOD AND APPARATUS FOR CREATION AND ELECTRICAL TUNING OF SPATIALLY NON-UNIFORM REFLECTION OF LIGHT

A variable optical device for controlling properties of reflected light is described. The device includes a light reflecting surface, a layer of dynamically controllable material and an excitation source for generating an excitation field acting on the layer of dynamically controllable material. An electrical drive signal applied to the excitation source causes a change of optical properties in the layer of dynamically controllable material to provide a spatially varying change in light...
Related applications: EP20150735422, WO2015CA50016, EP20150735422

LC MODULATOR DEVICES BASED ON NON-UNIFORM ELECTRODE STRUCTURES

Liquid crystal modulator optical devices and more specifically shutters and smart windows are presented. The liquid crystal modulator devices are characterized by a reduced polymer content which is eliminated from the material composition of the liquid crystal layer and characterized by non-uniform electrode structures in the liquid crystal structure configured to generate spatially non-uniform electric fields and therefore non-uniform molecular reorientation of liquid crystal molecules....
Related applications: CA20152995131, EP20150834167, WO2015CA50808

TUNABLE OPTICAL DEVICE, TUNABLE LIQUID CRYSTAL LENS ASSEMBLY AND IMAGING SYSTEM USING SAME

There is disclosed an imaging system for use in imaging a sample. The imaging system comprising a light source and a light detector. A probe optically coupled to the imaging assembly. The probe being configured to, during use, direct light from the light source to a focal point to illuminate the sample, and from the focal point to the light detector. The probe having a tunable liquid crystal lens (TLCL) assembly comprising at least one pair of TLCLs, the TLCLs of the pair being superposed to...
Related applications: WO2016CA50593, CA20162987207

METHOD AND APPARATUS FOR DYNAMICALLY VARIABLE ELECTRICAL CONTROL OF LIGHT BEAM REFLECTIVE LIQUID CRYSTAL DEVICES

A variable reflection mode optical device for controlling properties of reflected light is described. The device includes a light reflecting surface of an array of controllable mirror elements, a layer of dynamically controllable material and an excitation source for generating an excitation field acting on the layer of dynamically controllable material. An electrical drive signal applied to the excitation source causes a change of optical properties in the layer of dynamically controllable...
Related applications: WO2017CA51518, EP20170881796

ELECTRODE STRUCTURE FOR CREATING ELECTRICAL POTENTIAL GRADIENT

The present application relates to liquid crystal optical devices. It has been discovered that the problem of electric field discontinuity due to a discrete electrode arrangement in an LC-GRIN (or TLCL) optical device having a stepped voltage distribution in space can be solved by the use of phase shifted drive signals while using discrete shaped electrodes or by the use of a relatively high dielectric constant layer (HDCL), placed near the stepped electrode, which can "smoothen" the...
Related applications: EP20200899989, WO2020CA51688

LIQUID CRYSTAL OPTICAL ARRANGEMENT FOR CONTROLLABLY OBSCURING A PORTION OF A FIELD OF VIEW

Liquid crystal optical devices are disclosed that allow for dynamic light modulation to be selectively controlled within a portion of an aperture of the liquid crystal modulator and/or that have an improved spatial modulation of the electric field using electrodes causing light within the portion of the aperture to be diverted from a collimated beam and thus appear to be obscured or darkened in the projected beam or in a received beam.
Related applications: WO2021CA51164