Single-Frequency, 55-W-Average-Power, 1-kHz-Pulse-Rate, Nd:YLF Laser System

2007 ◽  
Author(s):  
Yelena Isyanova ◽  
Peter F. Moulton
Keyword(s):  
Pulse Rate ◽  
Laser System ◽  
Average Power ◽  
Single Frequency

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

The advancement of pump channel of high peak and high average power laser system

2018 ◽  
Author(s):  
V.V. Petrov ◽  
G.V. Kuptsov ◽  
V.A. Petrov ◽  
A.V. Laptev ◽  
A.V. Kirpichnikov ◽  
...  
Keyword(s):  
Laser System ◽  
Average Power ◽  
High Peak ◽  
High Average Power ◽  
Power Laser

scholarly journals Development of High-Peak and High-Average-Power MOPA Laser System Using Yb-Doped Photonic Crystal Fiber

2012 ◽  
Vol 40 (10) ◽  
pp. 780
Author(s):  
Hidetsugu YOSHIDA ◽  
Takeshi YAMAMURA ◽  
Masahiro ISHIKAWA ◽  
Koji TSUBAKIMOTO ◽  
Hisanori FUJITA ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Laser System ◽  
Average Power ◽  
High Peak ◽  
High Average Power ◽  
Crystal Fiber ◽  
Mopa Laser

Video-Rate Scanning Two-Photon Excitation Fluorescence Microscopy

1998 ◽  
Vol 4 (S2) ◽  
pp. 424-425
Author(s):  
G.Y. Fan ◽  
H. Fujisaki ◽  
R.-K. Tsay ◽  
R.Y. Tsien ◽  
Mark H. Ellisman
Keyword(s):  
Laser Beam ◽  
Group Velocity Dispersion ◽  
Laser System ◽  
Average Power ◽  
Laser Pulses ◽  
Green Laser ◽  
Two Photon ◽  
Photon Excitation ◽  
Schematic Layout ◽  
Two Photon Excitation

A video-rate scanning two-photon excitation microscope (TPEM) has been successfully constructed and tested. The TPEM, based on a Nikon RCM-8000, incorporates a femtosecond pulsed laser, a pre-chirper, and a non-confocal detection box for ratio imaging. Fig. 1 shows the schematic layout of the main components of the instrument, each of which is briefly discussed below.Laser System: A Tsunami Ti: Sapphire laser (from Spectra-Physics) is optically pumped by a 5 W green laser (Millennia from Spectra-Physics) and is capable of generating 100 fs pulses at a repetition rate of 82 MHz and an average power of 0.8 W. The output wavelength is tunable from 690 to 1050 nm with three optical sets, each covering part of the spectrum with some overlapping.Pre-chirper: After leaving the Tsunami, the laser beam enters an optic unit known as a pre-chirper which pre-chirps laser pulses to compensate for the group velocity dispersion which will result when the laser beam goes through the microscope optics.

Dynamics of a three-parameter electromagnetic vibration energy harvester considering electromechanical coupling

2019 ◽  
Vol 234 (7) ◽  
pp. 1323-1339
Author(s):  
Haiping Liu ◽  
Dongmei Zhu
Keyword(s):  
Energy Harvester ◽  
Mechanical Vibration ◽  
Average Power ◽  
Electrical Circuit ◽  
Single Frequency ◽  
Vibration Energy ◽  
Electrical Load ◽  
Vibration Energy Harvester ◽  
Analytical Expressions ◽  
Frequency Harmonic

The paper concerns the dynamic responses and vibration energy harvesting characteristics in an electromagnetic vibration energy harvester comprising three-parameter mechanical vibration subsystem. For completeness and comparison, a two-parameter vibration energy harvester is also presented. The analytical expressions of the amplitude-frequency and phase-frequency responses of the inertial mass and the current in the electrical circuit are respectively derived by applying dimensionless method to the studied two- and three-parameter dynamic systems. Considering the effects of different types of ambient excitation, a single-frequency harmonic load and a periodic load are introduced into the analytical expressions on the dynamic performance of the vibration energy harvester. First of all, the influences of the designing parameters from the mechanical vibration subsystem and the electrical circuit subsystem on the vibration energy harvester are investigated. For evaluating the effects due to introducing the three-parameter mechanical vibration component, comparisons are made between two- and three-parameter vibration energy harvesters to convert the ambient excitations into electrical energy. And then, the expressions of the dimensionless average power which delivered into an electrical load under a single-frequency harmonic excitation or a periodic excitation are derived. The calculating results show that the energy conversion efficiency is enhanced significantly by changing the mechanical damping efficiency and the stiffness ratio for the three-parameter mechanical component of the energy harvester. At the same time, the average power of the three-parameter vibration energy harvester, which delivered into the electrical load, is also improved. However, the influences of the electrical circuit component on the ambient energy harvesting can be omitted when keeping the designing parameters of the mechanical part constant.

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