scholarly journals Engineering of Ti:Sapphire Lasers for Dermatology and Aesthetic Medicine

2021 ◽  
Vol 11 (22) ◽  
pp. 10539
Author(s):  
Aleksandr Tarasov ◽  
Hong Chu
Keyword(s):  
Excimer Laser ◽  
Technical Solution ◽  
Generation Process ◽  
Aesthetic Medicine ◽  
Third Harmonic ◽  
Ti:Sapphire Laser ◽  
Tattoo Removal ◽  
Ti:Sapphire Lasers ◽  
New Type ◽  
Laser Devices

This review describes new engineering solutions for Ti:Sapphire lasers obtained at Laseroptek during the development of laser devices for dermatology and aesthetic medicine. The first device, PALLAS, produces 311 nm radiation by the third harmonic generation of a Ti:Sapphire laser, which possesses similar characteristics to excimer laser-based medical devices for skin treatments. In comparison to excimer lasers, Ti:Sapphire laser services are less expensive, which can save ~10% per year for customers compared to initial excimer laser costs. Here, the required characteristics were obtained due to the application of a new type of diffraction grating for spectral selection. The second device, HELIOS-4, based on the Ti:Sapphire laser, produces 300 mJ, 0.5 ns pulses at 785 nm for tattoo removal. The characteristics of HELIOS-4 exceed those of other tattoo removal laser devices represented in the medical market, despite a simple and inexpensive technical solution. The development of the last laser required the detailed study of a generation process and the investigation of the factors responsible for the synchronization of the generation in Ti: Sapphire lasers with short (several millimeters) cavities. The mechanism that can explain the synchronization in such lasers is suggested. Experiments for the confirmation of this concept are conducted and analyzed.

A compact, high-pulse-energy, and 30-Hz Ti:Sapphire laser at 867 nm and its third harmonic at 289 nm

2001 ◽  
Author(s):  
Songsheng Chen ◽  
Larry B. Petway ◽  
Waverly D. Marsh ◽  
William C. Edwards ◽  
James C. Barnes
Keyword(s):  
Pulse Energy ◽  
High Pulse Energy ◽  
Third Harmonic ◽  
Ti:Sapphire Laser ◽  
High Pulse

Efficient Third-Harmonic Generation with a Ti:sapphire Laser

2001 ◽  
Author(s):  
Alex Yu. Dergachev ◽  
Bhabana Pati ◽  
Peter F. Moulton
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
Ti:Sapphire Laser

Third harmonic generation process in Al doped ZnO thin films

2014 ◽  
Vol 584 ◽  
pp. 7-12 ◽  
Author(s):  
M. Abd-Lefdil ◽  
A. Douayar ◽  
A. Belayachi ◽  
A.H. Reshak ◽  
A.O. Fedorchuk ◽  
...  
Keyword(s):  
Thin Films ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Zno Thin Films ◽  
Generation Process ◽  
Third Harmonic ◽  
Doped Zno

Study on Fixed-Point Growth of Thermal Bubble with Micro-Planar Induction Heater

2021 ◽  
Vol 14 ◽  
Author(s):  
Bendong Liu ◽  
Long Wang ◽  
Nailong Zhang ◽  
Haibin Liu ◽  
Desheng Li ◽  
...  
Keyword(s):  
Fixed Point ◽  
Ccd Camera ◽  
Heating Time ◽  
Generation Process ◽  
Induction Heater ◽  
Heating Plate ◽  
Planar Coil ◽  
New Type ◽  
Micro Actuators ◽  
The Ideal

Background: The thermal bubble-driven micro actuators have advantages of simple structure and low working voltage, which have broad prospects in the field of micro-fluidic systems. Methods: This paper presents a new type of micro-planar induction heater which can realize the fixed-point growth of thermal bubbles by adding some active cavities. The micro-planar induction heater is composed of a metal heating plate, a glass substrate and a planar coil. Results: In the experiments, an alternating current of 80kHz was applied to the micro-planar induction heater, both the heating time and the interruption time were 1 s controlled by PLC. A CCD camera was used to record the generation process of thermal bubbles, including nucleation, growth and shrinkage. The experimental results show that thermal bubbles can grow and contract periodically at the position of the cavities when the cavities diameter is 50μm and 90μm, respectively. The ideal thickness of the heating plate is between 6μm and 13μm. Conclusion:: The fixed-point growth of the thermal bubble with a micro-planar induction heater has been studied. This kind fixed-point growth of thermal bubbles can be used in micro actuators such as micro ejectors, micro mixers and micro pumps.

Passive energy jitter reduction in the cascaded third harmonic generation process

2014 ◽  
Vol 11 (7) ◽  
pp. 075403 ◽  
Author(s):  
L Yan ◽  
Z Huang ◽  
Y Du ◽  
Y You ◽  
X Sun ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Generation Process ◽  
Third Harmonic

scholarly journals QUANTUM CHANNELS IN NONLINEAR OPTICAL PROCESSES

2009 ◽  
Vol 18 (02) ◽  
pp. 285-299 ◽  
Author(s):  
DAVID S. BRADSHAW ◽  
DAVID L. ANDREWS
Keyword(s):  
Quantum Electrodynamics ◽  
Nonlinear Optical ◽  
Rayleigh Scattering ◽  
Third Harmonic Generation ◽  
Optical Nonlinearity ◽  
Quantum Channels ◽  
Third Harmonic ◽  
New Type ◽  
Specific Quantum ◽  
Illustrative Application

Quantum electrodynamics furnishes a new type of representation for the characterisation of nonlinear optical processes. The treatment elicits the detailed role and interplay of specific quantum channels, information that is not afforded by other methods. Following an illustrative application to the case of Rayleigh scattering, the method is applied to second and third harmonic generation. Derivations are given of parameters that quantify the various quantum channels and their interferences; the results are illustrated graphically. With given examples, it is shown in some systems that optical nonlinearity owes its origin to an isolated channel, or a small group of channels.

scholarly journals Third-harmonic generation of a continuous-wave Ti:Sapphire laser in external resonant cavities

2003 ◽  
Vol 82 (25) ◽  
pp. 4423-4425 ◽  
Author(s):  
J. Mes ◽  
E. J. van Duijn ◽  
R. Zinkstok ◽  
S. Witte ◽  
W. Hogervorst
Keyword(s):  
Harmonic Generation ◽  
Continuous Wave ◽  
Third Harmonic Generation ◽  
Resonant Cavities ◽  
Third Harmonic ◽  
Ti:Sapphire Laser
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