Ultrasonics, Journal Year: 2024, Volume and Issue: 148, P. 107548 - 107548
Published: Dec. 13, 2024
Language: Английский
Energies, Journal Year: 2025, Volume and Issue: 18(2), P. 351 - 351
Published: Jan. 15, 2025
Micro-drones weighing less than about 200 g have a limited flight time of 5–15 min. Dynamic charging by optical wireless power transmission is promising solution to this problem. This paper investigated the configuration and conditions required for dynamic micro-drones clarified effect weight change on size solar cells that can be installed. Furthermore, micro-drone equipped with cell without battery was used demonstrate vertical height 75 cm at 35 W light output. The results are useful continuous transmission.
Language: Английский
Citations
2
Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)
Published: Sept. 3, 2024
Abstract Vertical cavity surface emitting lasers (VCSELs) have emerged as a versatile and promising platform for developing advanced integrated photonic devices systems due to their low power consumption, high modulation bandwidth, small footprint, excellent scalability, compatibility with monolithic integration. By combining these unique capabilities of VCSELs the functionalities offered by micro/nano optical structures (e.g. metasurfaces), it enables various energy-efficient compact size, enhanced performance, improved reliability functionality. This review provides comprehensive overview state-of-the-art devices/systems based on VCSELs, including neural networks, vortex beam emitters, holographic devices, deflectors, atomic sensors, biosensors. leveraging open up new opportunities in fields, artificial intelligence, large-capacity communication, imaging, biosensing, so on. Through this review, we aim provide detailed understanding pivotal role played photonics highlight significance advancing field towards efficient, compact, solutions.
Language: Английский
Citations
5
Journal of Physics D Applied Physics, Journal Year: 2024, Volume and Issue: 57(35), P. 353001 - 353001
Published: May 23, 2024
Abstract Vertical-cavity surface emitting lasers (VCSELs) have emerged as a highly promising light source with extensive applications in various fields, including consumer electronics, optical communication, metrology, sensing and ranging. Their low-cost, high conversion efficiency, compact footprint make them particularly attractive for widespread adoption. While considerable success has been made enhancing the performance speed of VCSELs communications, achieving high-power properties such output power, single transverse mode operation, temperature stability remote remains challenging endeavor. This review aims to provide comprehensive overview recent advancements development VCSELs. By examining active materials, device designs, array configurations, this seeks shed on current state-of-the-art potential avenues further improvement VCSEL technology.
Language: Английский
Citations
4
ACS Photonics, Journal Year: 2024, Volume and Issue: 11(8), P. 3276 - 3287
Published: July 16, 2024
The realization of micro/nanosized electrically pumped laser diodes, which show unique advantages including minimized footprint, ultralow threshold, energy-efficiency, and single-frequency characteristics, is hoped to feature as an indispensable unit in optoelectronic photonic integrated circuits. Herein, we present a single-mode microlaser diode driven by electricity. This comprises n-type AlGaN film coated with SnO2 nanolayer, Pt nanoparticle-modified ZnO microwire via Ga impurity (PtNPs@ZnO:Ga MW), Pt/MgO bilayer, p-GaN substrate. device demonstrates distinct double-heterojunction (n–n–p) enabling it lase at 387.3 nm. line width tremendously reduced about 0.05 nm, yielding laser's quality (Q)-factor approaching 7746. carefully designed double heterostructure allows one achieve superinjection current, accompanied the efficient confinement injected charge carriers photons MW cavity. As modified using PtNPs specific dimensions, dynamic modulation lasing modes ranging from multimode operation achieved. Such methodical design assembly could open up new technological avenues for constructing high-performance diodes upon electrical pump. We expect that this research will advance development microlasers desired performance robust applications.
Language: Английский
Citations
4
ACS Photonics, Journal Year: 2025, Volume and Issue: unknown
Published: April 30, 2025
Language: Английский
Citations
0
Photonics, Journal Year: 2024, Volume and Issue: 11(3), P. 258 - 258
Published: March 13, 2024
Improving the output power and efficiency of broad-area diode lasers is a prerequisite for further development fiber lasers, solid-state laser industries, direct semiconductor applications. At present, large amount Joule heat generated by drive currents limited wall-plug presents largest challenge improving these lasers. In this paper, multi-junction cascade with low generation demonstrated, showing conversion efficiency. We fabricated devices different junction numbers compared their power. present double-junction emitting at ~915 nm an emitter width 500 μm, delivering 132.5 W continuous wave 70 A, which highest reported so far any single-emitter laser. The efficiencies are 66.7% 60%, 100 132 W, respectively.
Language: Английский
Citations
2
Photonics, Journal Year: 2024, Volume and Issue: 11(6), P. 500 - 500
Published: May 24, 2024
This paper introduces a new safety approach for Optical Wireless Power Transmission (OWPT), technology that is integral to the kinds of (WPT). It starts from fundamental configuration current OWPT system, addressing concerns related lasers by involving laser irradiation hazards, exposure regulation and guidelines, comparison with other methods. A camera-based system focused on emission control light source proposed, it utilizes depth camera finely tuned computer vision-based program. Through meticulous design experiments, proposed can detect moving objects in limited indoor environment laser/LED transmission according object’s velocity dynamically. Various functions exclusive improvements towards operation are mentioned, Dynamic Safety-Distance as core mechanism system. on-site operation’s evaluation discussed, acknowledging both advantages limitations concludes suggestions further developments incorporating concept Automatic Emission Control.
Language: Английский
Citations
2
IEEE Photonics Technology Letters, Journal Year: 2024, Volume and Issue: 36(24), P. 1489 - 1492
Published: Nov. 14, 2024
Language: Английский
Citations
1
Photonics Research, Journal Year: 2024, Volume and Issue: 12(9), P. 1899 - 1899
Published: July 3, 2024
High-power, high-efficiency single-mode vertical-cavity surface-emitting lasers (VCSELs) are crucial in the realm of green photonics for high-speed optical communication. However, recent years, power and efficiency VCSELs have remained relatively low been progressing slowly. This study combines theoretical models with experiments to show that multi-junction cascaded 940 nm based on surface microstructures can achieve high power, efficiency, divergence laser output. Simulations boost mode modulation capabilities, potentially allowing high-power surpass 60% efficiency. Using this technique, 6 μm oxide aperture relief different diameters were fabricated. The output 20.2 mW, side-mode suppression ratios greater than 35 dB, 42% electro-optical a 9.8° angle (at 1/e 2 ) under continuous-wave operation demonstrated. Near-field images verified its fundamental operation. To best authors’ knowledge, is highest recorded single-unit VCSEL date, almost twice currently known record, while still maintaining very conversion research will provide valuable references further development application high-power, semiconductor lasers.
Language: Английский
Citations
0
Micromachines, Journal Year: 2024, Volume and Issue: 15(8), P. 968 - 968
Published: July 29, 2024
The high-power laser diode (HPLD) has witnessed increasing application in space, as the aerospace industry is developing rapidly. To cope with space environment, optimizing heat-dissipation structure and improving ability via heat conduction have become key to researching thermal reliability of HPLD environments. Based on a theoretical analysis HPLD, simulation model was constructed for numerical simulation, it found that maximum temperature resistance lasers were efficaciously decreased by changing packaging position bars. bars cutting angle microchannel sink (MCHS) determined based light-emitting unit internal MCHS. MCHS optimized through single-factor experiment, an orthogonal combination neural networks genetic algorithms (GAs), using three structural parameters, namely ridge width, W1, channel W2, length, L1. After optimization, performance obviously improved. Finally, carried out applicability higher power.
Language: Английский
Citations
0