Ultrahigh-brightness microbeams: considerations for their generation and relevance to FEL

Ishizuka, Hiroshi; Nakahara, Y.; Kawasaki, S.; Sakamoto, K.; Watanabe, Akihiko; Ogiwara, Norio; Shiho, M.

doi:10.1109/pac.1993.309072

Cited by 1 publication

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“…Results showed propagation efficiency of 90% at a range of 1.2 km, at 3 kW laser power in moderate turbulence within the atmosphere [78]. Ishizuka et al [79] stated that the brightness of field-emission tips (electron microbeams) could be substantially improved by using a magnetic field instead of the electrostatic lens to suppress the divergence of such microbeams which inherently enhanced the actual brightness. This concept could be adopted to lasers in general, whereby the wavelength as such can be extended to function in the X-ray wavelength regions at considerable energy densities.…”

Section: Modification Of Optical Resonator Beam Delivery and Opticsmentioning

confidence: 99%

Understanding laser beam brightness: A review and new prospective in material processing

Shukla

Lawrence

Zhang

2015

Optics & Laser Technology

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a b s t r a c tThis paper details the importance of brightness in relation to laser beams. The 'brightness' of lasers is a term that is generally not given much attention in laser applications or in published literature. With this said, it is theoretically and practically an important parameter in laser-material processing. This study is first of a kind which emphasizes in-depth, the concept of brightness of lasers by firstly reviewing the existing literature and the progress with high brightness laser-material processes. Secondly, the techniques used to enhance the laser beam brightness are also reviewed. In addition, we review the brightness fundamentals and rationalize why brightness of lasers is an important concept. Moreover, an update on the analytical technique to determine brightness using the current empirical equations is also provided. A modified equation to determine the laser beam brightness is introduced thereafter. Furthermore, research studies previously conducted to modify laser design to affect laser beam brightness are also discussed. The paper not only involves a review of the techniques used to improve laser beam brightness but also reviews how bright lasers can be employed to enhance/improve laser process capabilities and cost reduction of the laser assisted processes in manufacturing.

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Section: Modification Of Optical Resonator Beam Delivery and Opticsmentioning

confidence: 99%

Understanding laser beam brightness: A review and new prospective in material processing

Shukla

Lawrence

Zhang

2015

Optics & Laser Technology

View full text Add to dashboard Cite

show abstract

Ultrahigh-brightness microbeams: considerations for their generation and relevance to FEL

Cited by 1 publication

References 11 publications

Understanding laser beam brightness: A review and new prospective in material processing

Understanding laser beam brightness: A review and new prospective in material processing

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