A5078489432- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Laser Design and Applications
- Spectroscopy and Laser Applications
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Radiation Detection and Scintillator Technologies
- Advanced Optical Imaging Technologies
- Random lasers and scattering media
- Surface Roughness and Optical Measurements
- Advanced Photonic Communication Systems
McMaster University
2019-2024
Mid-IR light detection based on intracavity upconversion using a compact structure has been studied experimentally and theoretically. The mid-IR detector consists of 47.5 mm MgO doped periodically poled lithium niobate crystal placed in resonant cavity 1064 nm diode-pumped Nd:YVO 4 laser to enhance efficiency. generated is mixed with mid-infrared source emitting at 3469 an dichroic mirror. This produces short wave infrared 814.2 via sum frequency generation (SFG). upconverted overlaps the...
We report a diode pumped solid state (DPSS) laser used for intracavity pump-enhanced difference frequency generation (DFG) to create 3.5 micron laser. Using 50 mm-long periodically poled lithium niobate (PPLN) crystal inside the cavity of an Nd:YVO4 at 1064 nm with 4.5 W pump power 808 nm, and 310 mW C-band signal 1529 up 31 mid-infrared output 3499 is obtained. The requires no active stabilization and/or locking, entire <8 cm in length. obtained corresponds black box efficiency...
In this paper, a novel approach to modelling intracavity second harmonic generation (SHG) in periodically poled MgO-doped lithium niobate (PPLN) is presented and verified against experimental results. This involves combining the coupled nonlinear wave equations with rate equation model for diode-pumped solid-state Nd:YVO 4 laser, taking into account both depletion of fundamental due energy conversion from SHG reduction within laser cavity loss as result process. It was shown that theoretical...
We report a diode-pumped solid-state (DPSS) laser used for intracavity pump-enhanced difference frequency generation (DFG) to create 3.5-micron laser. Using 50 mm-long periodically poled lithium niobate (PPLN) crystal inside the cavity of an Nd:YVO4 at 1064 nm with 4.5 W pump power 808 nm, and 310 mW C-band signal 1529 up 31 mid-infrared output 3499 is obtained. The requires no active stabilization and/or locking, entire <8 cm in length. obtained corresponds black-box efficiency 2.20%W−1,...
This study presents a compact intracavity difference-frequency generation (DFG) source designed for mid-infrared (mid-IR) applications. By optimizing overlap between the pump and signal beams, we obtained black-box efficiency (ηBB) of 3.4% W⁻1 maximum DFG output power 63 mW at wavelength 3437 nm 50 mm long periodically poled lithium niobate (PPLN) crystal. The mid-IR laser was systematically studied various PPLN lengths (29 mm, 40 mm), demonstrating extensive tunability across range...
Mid-IR light detection based on intracavity upconversion using a compact structure has been studied both experimentally and theoretically. The mid-IR detector consists of 47.5 mm MgO doped periodically poled lithium niobate crystal placed in resonant cavity 1064 nm diode-pumped Nd:YVO4 laser to enhance efficiency. generated is mixed with mid-infrared source emitting at 3469 an dichroic mirror. This produces short wave infrared 814.2 via sum frequency generation (SFG). upconverted overlaps...
Mid-IR light detection based on intracavity upconversion using a compact structure has been studied both experimentally and theoretically. The mid-IR detector consists of 47.5 mm MgO doped periodically poled lithium niobate crystal placed in resonant cavity 1064 nm diode-pumped Nd:YVO4 laser to enhance efficiency. generated is mixed with mid-infrared source emitting at 3469 an dichroic mirror. This produces short wave infrared 814.2 via sum frequency generation (SFG). upconverted overlaps...
Abstract In this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate maximum SHG power generated full-width at half (FWHM) crystal’s temperature tuning curve to optical crystal. It was shown that increases rapidly with increase MgO:PPLN length, reaching saturation (~ 2 mm), which much shorter than...
A method of speckle reduction suitable for use in a laser projector was proposed the paper. Speckle contrast ratio (SCR) achieved by combining wavelength diversity and angular methods. First, demonstrated two green sources (a 520 nm diode (LD) 532 diode-pumped solid-state (DPSS) laser) at power 4:1. Second, via vibration lenses orthogonal directions placed directly after source. The vibrating are small do not require changes to beam path source, allowing more compact designs. frequency these...
A compact, and low cost CW 561 nm diode pumped solid state (DPSS) yellow laser is proposed discussed. The was built upon an Nd:YAG crystal MgO:PPLN as the nonlinear medium. advantages of well stability physical origins observed effects are
A compact, and low cost CW 561 nm diode pumped solid state (DPSS) yellow laser is proposed discussed. The was built upon an Nd:YAG crystal MgO:PPLN as the nonlinear medium. advantages of well stability physical origins observed effects are
Abstract In this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate maximum SHG power generated full-width at half (FWHM) crystal’s temperature tuning curve to optical crystal. It was shown that increases rapidly with increase MgO:PPLN length, reaching saturation (~2 mm), which much shorter than predicted...