high laser beam quality
Optical trapping with superfocused high M2 laser diode beam
... higher-power laser diodes are prone to multiple transverse mode generation and filamentation that make it difficult to deploy these laser beams in applications that require tight focusing of the ...
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Beam spot of Q-switched ND: YAG laser based on raster graphic
... the laser output powers of 20 megawatts scale and pulse durations of less than 100 nanoseconds are commonly ...The high-intensity pulses may be required to convert light from 1064 to become 532 nm through ...
5
High-Gain Low-Noise Pre-Amplifier and Narrow Band-Pass Filter for Photoacoustic Spectrometer
... a high-gain low-noise pre-amplifier and a narrow band-pass filter for photoacoustic spectrometer ...modulated laser beam applied on the sample, and it is found that the signal quality has been ...
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Application and Development of Wavefront Sensor Technology
... optics, laser beam quality diagnosis, laser atmospheric communication, optical element and optics system detection, quantitative phase microscope, human eye aberration measurement and other ...
6
A Sensitivity Study of 4340 Steel Hardness Profile Heat- Treated by Laser
... applications, laser hardening is a highly efficient process, because it is able to improve the hardness field, wear resistance, fatigue life and the surface tribology conditions of mechanical components, while ...
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Plasma Mirrors for Cleaning Laser Pulses from the Infrared to the Ultraviolet
... observed high efficiency of the plasma mirror allows its direct use after the first amplifier, as even in this case more than 60% of the energy can be coupled to the ...the high reflectivity requires ...
6
High quality electron beam acceleration by ionization injection in laser wakefields with mid-infrared dual-color lasers
... Figure 1(a) shows the ionization probability after one laser cycle vs. electric field amplitude either for 2 . 4 µ m or for 0 . 8 µ m lasers. Only the first K-shell electrons are considered. We do not consider the ...
5
High power two micron fibre bulk hybrid lasers
... guided-wave laser has a history almost as long as that of the laser itself [Snitzer61, ...of high-quality single mode rare-earth doped silica fibres with low propagation losses resulting in ...
117
Beam quality study for a grating based dielectric laser driven accelerator
... Dielectric laser-driven accelerators (DLAs) based on grating structures are considered to be one of the most promising technologies to reduce the size and cost of future particle ...offer high accelerating ...
8
Remote Laser Welding with High Power Fiber Lasers
... remote laser welding with fiber lasers. Remote fiber laser welding is a versatile technology with a promising ...as high productivity, high flexibility, and low operational ...as beam ...
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Conical diffraction and Bessel beam formation with a high optical quality biaxial crystal
... Gaussian beam output of a 10 mW 632 nm He-Ne laser was left–circularly polarized using a linear polarizer and a λ/4 ...The beam was focused with a x10 microscope objective to form a beam waist ...
9
TERA MIR radiation : materials, generation, detection and applications II
... novel, high power Yb:doped pulsed nanosecond fiber laser system with exceptional beam quality, aluminum metal surfaces can be machined with high precision leading to a high ...
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Numerical analysis of laser preheating for laser assisted micro milling of inconel 718
... Laser Assisted Micro Milling. A AlTiN two flutes coated carbide ball mill with the maximum tip diameter of 300 µm were used to performed linear groove on an Inconel 718 (21-23 HRC) plate. The plate has a thickness ...
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EXPERIMENTAL VERIFICATION OF THE TURBULENT EFFECTS ON LASER BEAM PROPAGATION IN SPACE
... conducted to determine the most effective filter whilst ensuring bright, clear interferograms that could be characterized. Examples of interferograms are pre- sented in Figure 6. One of them (in the left panel) does not ...
17
Optimal control of a space-borne laser system for a 100 m asteroid deflection under uncertainties
... the laser beam on different points on the asteroid surface such that a desired direction can be ...the laser pointing direction ...the laser beam on specific surface ...
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Laser beam modulation by an acousto optic mode locker
... of laser pulses of ultra short duration and very high peak ...such high power and short time duration has aroused considerable interest among military, academic, and industrial ...of ...
6
Laser-plasma generated very high energy electrons (VHEEs) in radiotherapy
... A high level of entrance dose results from the superposition of several narrow mono-energetic pencil-shaped beams during intensity modulated proton therapy ...
9
Plasmonic effects upon optical trapping of metal nanoparticles
... In the beginning of this chapter we discussed the possibilities to describe the response of a metal nanoparticle to an electromagnetic field in terms of polarisability and cross sections. Analysing the assumptions made ...
126
Birefringence Properties and Surface Relief Grating Formation on Methylacrylate Polymers with Photochromic Side Chains
... ion laser (488 nm) is used as pump beam inside the absorption band of polymers, and a He-Ne laser (633 nm) is used as a probe ...He-Ne laser through the film placed between crossed polarizers ...
8
LASER BEES : A concept for asteroid deflection and hazard mitigation
... This includes: • • • • • • • • • • • Ablation experiment on a pendulum, rather than static sample Ablation from a highly angled laser beam Ablation of a pulsed laser beam, assess higher [r] ...
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