High Power Laser technology, ultrafast optics and applications - 6Virtual room: Optonique - 3
|Thursday, May 28|
HP-6-28-1 / Miniaturized and invisible laser-inscribed photonic circuits
* Jerome Lapointe, Centre d'optique, photonique et laser, Canada
Jean-Philippe Bérubé, Centre d'optique, photonique et laser
Yannick Ledemi, Centre d'optique, photonique et laser
Albert Dupont, Centre d'optique, photonique et laser
Vincent Fortin, Centre d'optique, photonique et laser
Younès Messaddeq, Centre d'optique, photonique et laser
Réal Vallée, Centre d'optique, photonique et laser
Band gap changes in crystals and glasses locally induced by femtosecond laser pulses could lead to new invisibility and miniaturized applications. We found that the femtosecond-laser-induced band-gap shift (FLIBGS) has an exponential impact on the refractive index change in the transparent region of the spectrum near the electronic resonance absorption edge. Using the FLIBGS, we theoretically and experimentally demonstrated 3D waveguides with submillimeter bend radii, single-scan fabrication of waveguides in a crystal and a new concept of direct inscription of invisible structures.
HP-6-28-2 / Performance comparison of LiGaS2 and BaGa4S7 in a few-cycle mid-infrared OPA
* Zsuzsanna Heiner, SALSA, Humboldt-Univerzität zu Berlin, Germany
Valentin Petrov, Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
Mark Mero, Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
We report on a BaGa4S7-based few-cycle mid-infrared OPA and directly compare its performance to an LiGaS2-based OPA in the 6-11 μm spectral range. The OPA design was guided by z-scan studies to characterize the nonlinear refraction and absorption properties of the crystals at 1 μm.
HP-6-28-3 / Ultra-broad, Extra flatness All Fiber UV Shifted Supercontinuum Source
* Pin Long, O/E LAND INC., Canada
Qammar Goher, O/E LAND INC.
Reza Soltanian, INRS
Francois Legare, INRS
this paper experimentally demonstrates the generation of broadband supercontinuum (SC) light source by using self-start mode-locked fiber laser in 1064nm region. Ultra short pulse sub 10ps level with high average power generated SC from 400nm – 2000nm in photonic crystal fiber (PCF).
HP-6-28-4 / Optical fiber laser pulse pedestal suppression and compression using Gires-Tournois interferometer
* Reza Soltanian, INRS-EMT, Canada
Pin Long, O-ELand
Qammar Goher, O-ELand
Légaré François, INRS-EMT
This report experimentally demonstrates optical pulse compression and pedestal suppression of mode-locked fiber laser. A simple Fabry-Perot in the reflection mode is utilized as Gires-Tournois interferometer (GTI) inside the seed of fiber based mode-locked laser setup to compensate the group velocity dispersion (GVD) in all normal dispersion regime at 1030nm.
HP-6-28-5 / Development of a CW tunable Yb:CaF2 laser
Reza Akbari, University of Manitoba
* Arkady Major, University of Manitoba, Canada
High power continuous-wave operation of a diode-pumped Yb:CaF2 laser was investigated. The laser generated 9.6 W of output power for 20.2 W of incident pump power. The wavelength tuning range of the laser was also measured by using a birefringent filter and laser operation from 1011 m to 1071 nm was obtained at room temperature. These results indicate the potential of generating high power ultrashort pulses or multi-wavelength radiation.
HP-6-28-6 / Investigation of the impact of opto-mechanical parameters towards high speed manufacturing of 3-dimensional patterns with nanosecond laser
* Shayan Mohammadi Pour Khajani, Concordia University, Canada
Hamid Ebrahimi orimi, Concordia University
Sivakumar Narayanswamy, Concordia University
The study investigated the effects of opto-mechanical parameters such as laser power, pulse overlap, and the number of pulses on the depth of machining and surface roughness. The presented results are significantly essential to enhance the quality of the subtractive manufacturing of 3D structures.
HP-6-28-7 / Dioptric power of vanadate laser crystals
Mohammad Nadimi, University of Manitoba
Tanant Waritanant, Mahidol University
* Arkady Major, University of Manitoba, Canada
We report on thermal lensing measurements data in Nd:GdVO4 and Nd:YVO4 laser crystals that allow accurate estimation of dioptric power of the induced thermal lens under different experimental conditions.
HP-6-28-8 / The magnetic and thermal modelling of the electrical machines
* Mehmet Alp Ilgaz, University of Ljubljana, Faculty of Electrical Engineering, Slovenia
Selma Corovic, University of Ljubljana, Faculty of Electrical Engineering
Alen Alic, University of Ljubljana, Faculty of Electrical Engineering
Danilo Makuc, University of Ljubljana, Faculty of Electrical Engineering
Mario Vukotic, University of Ljubljana, Faculty of Electrical Engineering
Damijan Miljavec, University of Ljubljana, Faculty of Electrical Engineering
Laser cutting is one of the very well-known techniques to manufacture electrical machines. The edges of the stator and rotor lamina influenced by the laser cutting become degraded areas after the cutting process. The B-H curve of the ferromagnetic material are deteriorated because of the laser cutting as well. In this paper, we present the state of the art for the laser cutting and thermal influence on the electrical machine characteristics. As well as the novel approach for the electrical machine properties modelling, including technology-thermal-magnetic cross effect.