We demonstrate the direct generation of visible vortex beams at 640 nm and 607 nm by employing an off-axis pumping scheme in a diode end-pumped Pr:YLF laser. A detailed numerical analysis, based on the coherent superposition of Hermite-Gaussian modes with different amplitudes and phases, is perfectly consistent with the experimentally observed lasing modes. The maximum vortex output powers have been measured to be 808 mW and 211 mW at a pump power of 3.16 W, for the wavelengths of 640 nm and 607 nm, respectively. We also demonstrate the handedness control of the generated vortex beam. Such a visible vortex laser can potentially be applied in super-resolution fluorescent microscopes and micro-fabrication research.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.27.018190 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Ecological environment quality evaluation based on water benefit-based ecological index in Guangdong Province, China].
Ying Yong Sheng Tai Xue Bao
October 2024
College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China.
As one of the provinces with the largest number of national forest cities, all prefecture-level cities in Guangdong Province have joined the campaigns of building forest cities. Mastering the spatial and temporal variations of ecological environment quality (EEQ) in Guangdong Province is conducive to the benign interaction and coordinated development of urban construction and ecosystem. We used the water benefit-based ecological index (WBEI) to achieve rapid monitoring of EEQ in Guangdong Province, utilized the standard deviation ellipse and gravity center migration, Theil-Sen Median trend method and Mann-Kendall test to explore the spatial distribution disparities and trends, and analyzed the coupling coordination between EEQ and urbanization.
View Article and Find Full Text PDFGeneration of transgenic chicken through ovarian injection.
Animal Model Exp Med
December 2024
Frontiers Science Center for Molecular Design Breeding (MOE), State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, Beijing, China.
Background: Traditional DNA microinjection methods used in mammals are difficult to apply to avian species due to their unique reproductive characteristics. Genetic manipulation in chickens, particularly involving immature follicles within living ovaries, has not been extensively explored. This study seeks to establish an efficient method for generating transgenic chickens through ovarian injection, potentially bypassing the challenges associated with primordial germ cell (PGC) manipulation and fertilized egg microinjection.
View Article and Find Full Text PDFA hybrid deep learning-based approach for optimal genotype by environment selection.
Front Artif Intell
December 2024
School of Industrial Engineering and Management, Oklahoma State University, Stillwater, OK, United States.
The ability to accurately predict the yields of different crop genotypes in response to weather variability is crucial for developing climate resilient crop cultivars. Genotype-environment interactions introduce large variations in crop-climate responses, and are hard to factor in to breeding programs. Data-driven approaches, particularly those based on machine learning, can help guide breeding efforts by factoring in genotype-environment interactions when making yield predictions.
View Article and Find Full Text PDFA feasibility study on the virtual adaptation of Child Adult Relationship Enhancement in Primary Care.
J Technol Behav Sci
December 2024
Division of General Pediatrics and Adolescent Medicine, Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Childhood behavioral problems are common; despite evidence that parenting interventions improve outcomes, the use of these programs is limited. Virtual delivery may ameliorate attendance barriers, but little is known on the acceptability and feasibility of virtual group parenting interventions. This mixed-methods study explored the feasibility, acceptability, and appropriateness of the virtual delivery of a parenting intervention, Child Adult Relationship Enhancement in Primary Care (PriCARE) among 18 caregivers and 8 facilitators.
View Article and Find Full Text PDFThe Striking Power of Amniotic Fluid and Its Exosomes Collected at the End of a Normal Pregnancy on Severe Inflammation and Tissue Repair.
Ann Case Rep
December 2024
Neobiosis LLC, UF Sid Martin Innovate Biotechnology Institute, Alachua, FL 32615, USA.
With this short communication, which contains a new case report on diabetic ulcer, we summarize our research progress in treating several complex conditions at a point where currently available treatments were failing to help the affected patients. We review the first case of lower back pain due to severe spondylitis (T12-L1) treated with intravenous injections of a sterile fraction of human purified amniotic fluid (ViX001) obtained from thoroughly screened volunteers at the time of planned c-section at the term of normal pregnancies. Then, we review the first case of recalcitrant diabetic ulcer treated successfully by twice-daily applications of ViX001 directly on the wound and describe another case of diabetic ulcer treated successfully with ViX001.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!