Laser pulse

Part 1 book "The physics and engineering of compact quantum dot based lasers for biophotonics" includes content: Quantum Dot technologies, ultra-short-pulse QD edge-emitting lasers, quantum dot semiconductor disk lasers.

134p dianmotminh04 12-07-2024 0 0   Download

In this paper, we present an in-house flexible and portable lidar system integrating an inexpensive, passively Q-switched laser Nd: YAG and a detection module operating in both analog and photon counting mode. This system is designed to study the atmospheric boundary layer (BL) and cirrus clouds (CC). The passively Q-switched Nd:YAG pulsed laser, operating at a second-harmonic generation (SHG) wavelength of 532 nm, features a pulse energy up to 200 mJ, a repetition rate of 1 Hz to 15 Hz, and a pulse duration of 15 ns.

14p dianmotminh02 03-05-2024 6 1   Download

. In this research, we present the DOAS system using the Ce:LiCAF laser for determining SO2 gas concentration in the atmosphere. The Ce:LiCAF laser has a full width at half maximum of 2 nm with a wavelength range from 286 to 291 nm and a peak wavelength of 288.5 nm. The results show that the DOAS system accurately determines the gas concentration with a measurement error of 6%. This result can serve as the basis for developing practical DOAS systems with the ability to monitor a wide range of gasses and survey many other types of pollutants.

8p dianmotminh02 03-05-2024 2 1   Download

Ebook "Ultrashort laser pulses in biology and medicine" gives an overview of biological and medical applications of these laser pulses. The briefness of these laser pulses permits the tracing of the fastest processes in photo-active bio-systems, which is one focus of the book. The other focus is applications that rely on the high peak intensity of ultrashort laser pulses. Examples covered span non-linear imaging techniques, optical tomography, and laser surgery.

326p ladongphongthanh1008 22-04-2024 3 2   Download

Ebook "Laser fragmentation and melting of particles" gives a general understandable introduction into the field of laser fragmentation and melting of particles. The presented state of the art summarizes the comparably young method of laser fragmentation of particles and the even younger method of laser melting of particles.

272p tracanhphuonghoa1007 22-04-2024 3 2   Download

Ebook "Quantum dynamics and laser control for photochemistry" description of ultrafast dynamical processes in molecular systems of chemical interest and their control by laser pulses. This work encompasses different cutting-edge methods in quantum chemistry, quantum dynamics and for the rigorous description of the interaction of light and matter at the molecular level. It provides a general quantum mechanical framework for the description of chemical processes guided by laser pulses, in particular near conical intersections, i.e.

198p tracanhphuonghoa1007 22-04-2024 3 2   Download

Ebook "Forestry applications of airborne laser scanning: Concepts and case studies" provides a comprehensive, state-of-the-art review of the research and application of ALS in a broad range of forest-related disciplines, especially forest inventory and forest ecology. However, this book is more than just a collection of individual contributions – it consists of a well-composed blend of chapters dealing with fundamental methodological issues and contributions reviewing and illustrating the use of ALS within various domains of application.

460p manmanthanhla0201 26-02-2024 2 1   Download

Part 1 book "Advances in 3D printing and additive manufacturing" includes content: Influence of process parameters on tensile strength of additive manufactured polymer parts using taguchi method; determination and comparison of the anisotropic strengths of fused deposition modeling P400 ABS; current trends of additive manufacturing in the aerospace industry; influence of oxygen partial pressure on hydroxyapatite coating of additive manufactured component by pulsed laser deposition;...and other contents.

89p muasambanhan06 01-02-2024 6 2   Download

Ebook "Laser-generated functional nanoparticle bioconjugates: Design for application in biomedical science and reproductive biology" discusses the structure-function relationship of nanoparticle conjugates derived from a laser-based fabrication method. Both the limits and perspectives of tunable conjugate functions are presented, providing a general outline for researchers to configure functionalized nanoparticles with a specifically optimized design for biomedical requests, e.g. in biomedical engineering regenerative science and reproductive biology.

317p lamquandat 28-12-2023 2 2   Download

To evaluate the efficacy and safety of the dual toning laser of Nd:YAG 1064nm picosecond and quasi-long pulsed laser combined with D-pigment night cream in treatment of severe melasma.

7p vispacex 13-11-2023 3 2   Download

Gold (Au) and silver (Ag) nanoparticles were synthesized by laser ablation in water. The average sizes of Au and Ag nanoparticles are of 18.4 nm and 21.8 nm, respectively. ZnS:Mn2+ nanoparticles with average size of 3-5 nm were prepared by co-precipitation method.

8p viberkshire 09-08-2023 5 4   Download

We observed the formation of damage induced by focusing a nanosecond laser beam inside a glass block using the shadowgraph imaging technique. The damage growth was observed during some first dozens of nanoseconds of the process. The result shows that the damage growth is divided into two periods. During the laser pulse, the damage grows quickly, following the formation of laser-induced plasma. When the laser is switched off, the damage grows at a much slower rate. We propose that the growth of damage during the second period is due to the propagation of the shear wave inside the material.

4p nhanchienthien 25-07-2023 4 3   Download

In the present work, we apply the method suggested in our previous studies to limit the HOR effect on the continuum harmonics by using up-chirped pulses with frequency increasing in time to regulate the high-order harmonic generation of an asymmetric molecule such as CO subjected to a near-infrared laser

12p vispiderman 15-06-2023 7 2   Download

The benefits of pulsed laser ablation in advanced manufacturing have been studied in terms of intensity, adequate orientation, damped noise, and great adaptability. During ultrashort laser ablation, the interaction between a copper surface and numerous pulses was explored to establish ideal focusing conditions.

7p vihawkeye 26-05-2023 7 2   Download

Part 1 of ebook "Advances in 3D printing and additive manufacturing technologies" provide readers with content about: influence of process parameters on tensile strength of additive manufactured polymer parts using taguchi method; determination and comparison of the anisotropic strengths of fused deposition modeling P400 ABS; estimation of the effect of process parameters on build time and model material volume for FDM process optimization by response surface methodology and grey relational analysis;...

89p damtuyetha 16-02-2023 5 2   Download

Photoelasticity images of pulsed laser ablation in water and in air were simulated by Finite Element Method. In the paper "Compare transient stress induced in in-air and in-water laser ablation using simulation method", the Von Mises stress distribution in the target is deduced from the simulated images and is compared between the two-ablation regimes. The result confirms that pulse laser ablation in the water can induced a stress about 100 times higher than that induced in ablation in the air.

4p runordie2 06-06-2022 10 0   Download

This paper proposes a non-contact and non-destructive method to generate Lamb waves against a target structure using the impulse excitation force generated by laser-induced plasma (LIP). When a high power pulse laser is irradiated in air and its laser fluence exceeds 1015 W/m2, a plasma is formed.

7p guernsey 28-12-2021 9 0   Download

The lasing thresholds of microsphere biolasers fabricated at 25 °C and 60 °C are similar. Furthermore, lasing operation under continuous pumping and lasing stability against storing time are also investigated. A typical 42 µm microsphere can still lase upon 2×104 excitation pulses. Lasers can work well after being stored for 12 weeks under ambient conditions.

7p meyerowitz 25-12-2021 12 1   Download

The micro/nano surface structure of triboelectric layers possesses a critical impact on the performance of triboelectric nanogenerators (TENG). Here, we present a solution for the enhancement of the triboelectric performance by utilizing a Q-switched Pulsed Laser (QSL) that directly writes on an Aluminum surface in the net configuration.

8p meyerowitz 25-12-2021 9 1   Download

In this study, rhenium/rhenium oxide nanoparticles (Re/ReO3NPs) have been produced for the first time in ultrapure water by using Femtosecond Pulsed Laser Ablation in Liquid (fsPLAL) method. X-Ray Diffraction (XRD) measurements and results obtained for NPs show the existence of well-crystallized peaks and preferred phases. Re NPs have hexagonal structure while ReO3 NPs have the perovskite-like cubic crystal structures. The Re/ReO3 ratio is also determined to be 53/47 with ~ 20 nm crystallite size, while pure ReO3 crystallite sizes were measured to be ~ 25 nm.

8p tudichquannguyet 29-11-2021 8 1   Download