Continuous-wave and self-starting passively mode-locked broadband Cr4+:YAG laser system

1998 ◽  
Author(s):  
Yongmao Chang ◽  
Romain Maciejko ◽  
Richard Leonelli ◽  
Anthony S. Thorpe
Keyword(s):  
Continuous Wave ◽  
Laser System ◽  
Yag Laser

scholarly journals Laser spectroscopy of the $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$, $$^2{\mathrm{P}}_{3/2}$$ transitions in stored and cooled relativistic C$$^{3+}$$ ions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
D. Winzen ◽  
V. Hannen ◽  
M. Bussmann ◽  
A. Buß ◽  
C. Egelkamp ◽  
...  
Keyword(s):  
Laser Spectroscopy ◽  
Continuous Wave ◽  
Detection System ◽  
Laser System ◽  
Theoretical Data ◽  
Plasma Spectroscopy ◽  
Carbon Ions ◽  
Uv Laser ◽  
Spectroscopy Experiment ◽  
Extreme Uv

AbstractThe $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$ 2 S 1 / 2 - 2 P 1 / 2 and $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{3}/2}$$ 2 S 1 / 2 - 2 P 3 / 2 transitions in Li-like carbon ions stored and cooled at a velocity of $$\beta \approx 0.47$$ β ≈ 0.47 in the experimental storage ring (ESR) at the GSI Helmholtz Centre in Darmstadt have been investigated in a laser spectroscopy experiment. Resonance wavelengths were obtained using a new continuous-wave UV laser system and a novel extreme UV (XUV) detection system to detect forward emitted fluorescence photons. The results obtained for the two transitions are compared to existing experimental and theoretical data. A discrepancy found in an earlier laser spectroscopy measurement at the ESR with results from plasma spectroscopy and interferometry has been resolved and agreement between experiment and theory is confirmed.

Laser therapy applications for osteoarthritis and chronic joint pain – A randomized placebo-controlled clinical trial

2012 ◽  
Vol 1 (4) ◽  
Author(s):  
Nelson Marquina ◽  
Roger Dumoulin-White ◽  
Arkady Mandel ◽  
Lothar Lilge
Keyword(s):  
Clinical Trial ◽  
Near Infrared ◽  
Continuous Wave ◽  
Laser System ◽  
Laser Diodes ◽  
Average Power ◽  
Evaluation Criteria ◽  
Adjunctive Treatment ◽  
Controlled Clinical Trial ◽  
Primary Evaluation

AbstractA randomized placebo-controlled clinical trial to evaluate an adjunctive treatment modality for pain associated with knee disorders was conducted utilizing a therapeutic laser system (low energy, non-surgical).The therapeutic laser system utilized a dual wavelength, multiple diode laser cluster probe with five super-pulsed 905 nm near-infrared (NIR) laser diodes, each emitting at 40 mW average power and four continuous wave 660 nm visible (VIS) red laser diodes, each emitting at 25 mW. It was used as an adjunctive modality providing 12 treatments, three times a week to a homogeneous patient population (n=126), in combination with standardized chiropractic techniques, to evaluate effectiveness on subjects presenting with osteoarthritis and knee pain. The primary endpoint was measured by the visual analog scale (VAS) to assess pain levels on a scale of 0–10. The success criteria for an individual patient in this study were identified as an improvement of 30% or more in the VAS from baseline to 12th treatment and/or an improvement of 20% or more in the VAS from baseline to 30-day follow-up evaluation.The data obtained in the study demonstrated that the present therapeutic laser system provided significant pain relief and osteoarthritic improvements in all primary evaluation criteria, with a statistical and clinical significance of

A 2-µm Continuous-Wave Laser System for Safe and High-Precision Dissection During NOTES Procedures

2010 ◽  
Vol 55 (9) ◽  
pp. 2463-2470 ◽  
Author(s):  
Xavier Dray ◽  
Gianfranco Donatelli ◽  
Devi Mukkai Krishnamurty ◽  
Elena Dubcenco ◽  
Ronald J. Wroblewski ◽  
...  
Keyword(s):  
High Precision ◽  
Continuous Wave ◽  
Laser System ◽  
Continuous Wave Laser ◽  
Wave Laser

scholarly journals Gold Nanorods for Light-Based Lung Cancer Theranostics

2018 ◽  
Vol 19 (11) ◽  
pp. 3318 ◽  
Author(s):  
Oscar Knights ◽  
James McLaughlan
Keyword(s):  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Continuous Wave ◽  
Low Cost ◽  
Laser System ◽  
Controlled Synthesis ◽  
Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Theranostic Applications ◽  
Cancer Theranostics

Gold nanorods (AuNRs) have the potential to be used in photoacoustic (PA) imaging and plasmonic photothermal therapy (PPTT) due to their unique optical properties, biocompatibility, controlled synthesis, and tuneable surface plasmon resonances (SPRs). Conventionally, continuous-wave (CW) lasers are used in PPTT partly due to their small size and low cost. However, if pulsed-wave (PW) lasers could be used to destroy tissue then combined theranostic applications, such as PA-guided PPTT, would be possible using the same laser system and AuNRs. In this study, we present the effects of AuNR size on PA response, PW-PPTT efficacy, and PA imaging in a tissue-mimicking phantom, as a necessary step in the development of AuNRs towards clinical use. At equivalent NP/mL, the PA signal intensity scaled with AuNR size, indicating that overall mass has an effect on PA response, and reinforcing the importance of efficient tumour targeting. Under PW illumination, all AuNRs showed toxicity at a laser fluence below the maximum permissible exposure to skin, with a maximum of 80% cell-death exhibited by the smallest AuNRs, strengthening the feasibility of PW-PPTT. The theranostic potential of PW lasers combined with AuNRs has been demonstrated for application in the lung.

Pulsed versus continuous wave Nd-YAG laser-induced necrosis: Comparison in the rat liver in vivo

1995 ◽  
Vol 10 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Alain Sibille ◽  
Thierry Ponchon ◽  
Françoise Berger ◽  
René Lambert
Keyword(s):  
Rat Liver ◽  
Continuous Wave ◽  
Yag Laser

Thermal Side Reactions During In Vitro Contact Cyclophotocoagulation With the Continuous Wave Nd: YAG Laser

1990 ◽  
Vol 21 (5) ◽  
pp. 356-358
Author(s):  
Silvia Stolzenburg ◽  
Steffen Kresse ◽  
Norbert W Müller-Stolzenburg
Keyword(s):  
Continuous Wave ◽  
Side Reactions ◽  
Yag Laser

scholarly journals A High-Power and Highly Efficient Semi-Conductor MOPA System for Lithium Atomic Physics

2019 ◽  
Vol 9 (3) ◽  
pp. 471 ◽  
Author(s):  
Hao Wu ◽  
Hongbo Zhu ◽  
Jianwei Zhang ◽  
Hangyu Peng ◽  
Li Qin ◽  
...  
Keyword(s):  
Atomic Physics ◽  
Tuning Range ◽  
Continuous Wave ◽  
Laser System ◽  
Optical Design ◽  
Einstein Condensation ◽  
Solid State Lasers ◽  
Highly Efficient ◽  
Wall Plug Efficiency ◽  
Bose Einstein

A compact and highly efficient 670.8-nm semi-conductor master oscillator power amplifier (MOPA) system, with a unique optical design, is demonstrated. The MOPA system achieves a continuous-wave (CW) output power of 2.2 W, which is much higher than commercial products using semi-conductor devices. By comparing solid state lasers and dye lasers, higher wall-plug efficiency (WPE) of 20 % is achieved. Our developed laser system also achieves spectral line-width of 0.3 pm (200 MHz) and mode-hop free tuning range of 49 pm (32.6 GHz), which is very suitable for experiments of lithium atomic physics at several-watt power levels, such as Bose-Einstein condensation (BEC) and isotope absorption spectroscopy.

CROSS‐PUMPED Cr3+−Nd3+:YAG LASER SYSTEM

1964 ◽  
Vol 5 (10) ◽  
pp. 200-202 ◽  
Author(s):  
Z. J. Kiss ◽  
R. C. Duncan
Keyword(s):  
Laser System ◽  
Yag Laser
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