An Introduction to Lasers and Their Applications

O’Shea, Donald C.; Callen, W. R.; Rhodes, William T.; Thompson, Brian J.

doi:10.1119/1.11295

Cited by 37 publications

(14 citation statements)

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“…Lasers produce intense beams of light which are monochromatic, coherent, and highly collimated [1]. Frequency of laser light is extremely pure and this characteristic makes it useful for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of laser therapy on DNA damage

et al. 2010

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Section: Introductionmentioning

confidence: 99%

Effect of laser therapy on DNA damage

et al. 2010

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“…(49 -51,78,82,83) A ringdown cavity is a high-finesse etalon, and, as such, possesses a discrete mode structure dependent upon the design of the cavity. For a cavity constructed from two spherical surface mirrors of radius R 1 and R 2 separated by a distance L, the frequencies of the stable cavity modes are given by the equation (52,84,85) :…”

Section: Cavity Design and Cavity Ringdown Spectroscopy Implementationmentioning

confidence: 99%

Cavity Ringdown Laser Absorption Spectroscopy

Wang

Miller

Winstead

2008

Encyclopedia of Analytical Chemistry

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Cavity ringdown spectroscopy (CRDS) has developed rapidly during the last two decades and has been implemented for a variety of applications ranging from fundamental spectroscopic studies, trace chemical detection for environmental monitoring, combustion flame chemistry and plasma diagnostics, elemental and isotopic measurements, breath gas analysis, and fiber ringdown chemical and physical sensor development. A host of chemical species, including atoms, ions, molecules, clusters, and free radicals, have been studied by CRDS. The experimental ringdown scheme has also evolved from an original mirror‐based format to various new forms for detection and analysis of analytes in either gas phase or liquid solutions. Recent research effort has also extended the CRDS approach for fiber optical sensor development. CRDS has become a mature spectrometric technique for a range of prototype and commercial instrumentation. This article provides a review of the latest developments in CRDS applications, specifically emphasizing new trends in elemental and isotopic analysis, plasma diagnostics, breath gas analysis, and new fiber ringdown techniques for sensor development. The introduction of cutting‐edge laser sources into CRDS methods, the combination of CRDS with conventional analytical tools, and current CRDS instrumentation are also briefly discussed.

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“…The emitted light beam bears specific characteristics, such as being collimated, monochromatic, coherent, and high light density [2]. Wavelength, frequency, power, fluence, and emission mode properties determine the photophysical, photochemical, and photobiological responses [3].…”

Section: Introductionmentioning

confidence: 99%

Low-intensity red and infrared lasers affect mRNA expression of DNA nucleotide excision repair in skin and muscle tissue

et al. 2016

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Lasers emit light beams with specific characteristics, in which wavelength, frequency, power, fluence, and emission mode properties determine the photophysical, photochemical, and photobiological responses. Low-intensity lasers could induce free radical generation in biological tissues and cause alterations in macromolecules, such as DNA. Thus, the aim of this work was to evaluate excision repair cross-complementing group 1 (ERCC1) and excision repair cross-complementing group 2 (ERCC2) messenger RNA (mRNA) expression in biological tissues exposed to low-intensity lasers. Wistar rat (n = 28, 4 for each group) skin and muscle were exposed to low-intensity red (660 nm) and near-infrared (880 nm) lasers at different fluences (25, 50, and 100 J/cm(2)), and samples of these tissues were withdrawn for RNA extraction, cDNA synthesis, and gene expression evaluation by quantitative polymerase chain reaction. Laser exposure was in continuous wave and power of 100 mW. Data show that ERCC1 and ERCC2 mRNA expressions decrease in skin (p < 0.001) exposed to near-infrared laser, but increase in muscle tissue (p < 0.001). ERCC1 mRNA expression does not alter (p > 0.05), but ERCC2 mRNA expression decreases in skin (p < 0.001) and increases in muscle tissue (p < 0.001) exposed to red laser. Our results show that ERCC1 and ERCC2 mRNA expression is differently altered in skin and muscle tissue exposed to low-intensity lasers depending on wavelengths and fluences used in therapeutic protocols.

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An Introduction to Lasers and Their Applications

Cited by 37 publications

References 0 publications

Effect of laser therapy on DNA damage

Effect of laser therapy on DNA damage

Cavity Ringdown Laser Absorption Spectroscopy

Low-intensity red and infrared lasers affect mRNA expression of DNA nucleotide excision repair in skin and muscle tissue

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