Showing papers on "Ruby laser published in 2018"
TL;DR: The interaction of laser pulses with the Cauliflower mosaic virus (CaMV) in a Tris-HCl pH7.5 buffer is investigated in this article, where 20 ns ruby laser pulses are used for the excitation.
Abstract: The interaction of laser pulses with the Cauliflower mosaic virus (CaMV) in a Tris-HCl pH7.5 buffer is investigated. 20 ns ruby laser pulses are used for the excitation. Spectra of the light passing through the sample and reflected from it are registered with the help of a Fabri–Perot interferometer. Stimulated low-frequency Raman scattering (SLFRS) in a CaMV suspension is registered. The SLFRS frequency shift, conversion efficiency and threshold are measured for the first time, to the best of our knowledge.
14 citations
TL;DR: The interaction of laser pulses with the Cauliflower mosaic virus (CaMV) in a Tris-HCl pH7.5 buffer is investigated in this article, where 20 ns ruby laser pulses are used for excitation.
Abstract: The interaction of laser pulses with the Cauliflower mosaic virus (CaMV) in a Tris-HCl pH7.5 buffer is investigated. 20 ns ruby laser pulses are used for excitation. Spectra of the light passing through the sample and reflected from it are registered with the help of a Fabri-Perot interferometer. Stimulated low-frequency Raman scattering (SLFRS) in a CaMV suspension is registered. The SLFRS frequency shift, conversion efficiency and threshold are measured for the first time, to the best of our knowledge.
10 citations
01 May 2018
TL;DR: The purpose of this review article is to critically analyze the effectiveness of diode laser on soft and hard tissue in the field of Periodontics.
Abstract: Lasers have completely changed the concept of dental treatment since three and half decades of 20th century After the invention of ruby laser by Maiman in 1960, laser has become the most magnetizing technology in dentistry Diode Lasers have been used in initial periodontal therapy, surgery, and also in implant treatment In many countries Laser has become a part of the dental armamentarium The included articles were searched from PubMed, Trip Database, Google scholar and Cocharane database The purpose of this review article is to critically analyze the effectiveness of diode laser on soft and hard tissue in the field of Periodontics
3 citations
01 Jan 2018
TL;DR: While nevi of Ota and lentigines respond well to laser therapy, post-inflammatory hyperpigmentation and melasma are often resistant to therapy, and combination regimens with topical therapies may be the most effective.
Abstract: Laser therapy can treat disorders of both hyper- and hypopigmentation, including vitiligo, lentigines, and melasma. When choosing the appropriate laser for treatment, wavelength, spot size, pulse duration, and fluence must be carefully considered. We will discuss several different lasers: the xenon chloride excimer laser (EL), the fractional carbon dioxide laser (FCO2), the quality-switched ruby laser (QSRL), the Q-switched alexandrite laser (QSAL), and the Q-switched neodymium yttrium-aluminum-garnet laser (QS Nd:YAG). Additionally, we will review and summarize the results of combination trials involving laser therapy for pigmentary disorders. While nevi of Ota and lentigines respond well to laser therapy, post-inflammatory hyperpigmentation and melasma are often resistant to therapy, and combination regimens with topical therapies may be the most effective. The utilization of lasers in medicine and dermatology will continue to evolve with improvements in laser technology.
2 citations
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TL;DR: The history of laser as discussed by the authors begins in the year 1960, when Theodore Maiman reported about pulsed laser activity of a ruby laser for the first time, and it was shown that the activity of the laser can be traced back to the early 1960s.
Abstract: The history of laser begins in the year 1960, when Theodore Maiman reported about pulsed laser activity of a ruby laser for the first time.
2 citations
TL;DR: ABNOM and nevus of Ota, are histologically similar, which suggested that laser therapy may also be successful for treating ABNOM, and the efficacy and complications of a fractional QS ruby laser (QSRL) in the treatment of ABnOM were evaluated.
Abstract: Acquired bilateral nevus of Ota-like macules (ABNOM) are a common form of hyperpigmentation in Asian populations, characterized by small, bilateral, blue-brown and/or slate-gray patches on the forehead, temples, eyelids, malar areas, and alae and roots of the nose [1]. As reported in other studies, several treatment modalities, including cryotherapy and dermabrasion, have been tried for ABNOM [2,3]. Based on the principles of selective photothermolysis, nevus of Ota has been successfully treated with Q-switched (QS) ruby lasers, QS alexandrite lasers, and QS neodymium-doped yttrium aluminium garnet lasers (QS-Nd:YAG) [4-7]. ABNOM and nevus of Ota, are histologically similar, which suggested to us that laser therapy may also be successful for treating ABNOM. We therefore assessed the efficacy and complications of a fractional QS ruby laser (QSRL) in the treatment of ABNOM. The purpose of this study was to evaluate the efficacy and complications of QSRL in the treatment of ABNOM. Sun Jae Lee, Seung Min Nam, Han Gyu Cha, Eun Soo Park, Yong Bae Kim
1 citations
16 Apr 2018
TL;DR: In this paper, the anti-Stokes properties of nanomaterials in green-blue range, with respect to the exciting ruby laser pulses, are studied at different temperatures.
Abstract: Luminescence of nanomaterials in green-blue range, anti-Stokes with respect to the exciting ruby laser pulses, is studied at different temperatures. Both high-ordered systems and random materials have been used as samples. Spectral and temporal characteristics of the luminescence have been measured. Two types of temporal behavior have been found out depend on temperature. Long luminescence (up to few seconds) under nanosecond excitation has been shown to exist only at the temperatures below the definite threshold, which was found to be 110 K.
Patent•
15 Feb 2018
TL;DR: In this paper, an apparatus and method for producing an ultrashort pulsed output beam was provided for a first GaN semiconductor laser diode pumped, Q-switched ruby laser with a broadband gain element doped with trivalent chromium ions.
Abstract: An apparatus and method are provided for producing an ultrashort pulsed output beam. A 694 nm pump beam from a first GaN semiconductor laser diode pumped, Q-switched ruby laser is directed into at least one amplifier that includes a broadband gain element doped with trivalent chromium ions (Cr3+). A spectrally linearly chirped low-intensity seed pulse from a master oscillator is directed into the at least one optically pumped amplifier to produce an amplified linear chirped pulsed output beam. A 694 nm second pump beam from a second GaN semiconductor laser diode pumped, Q-switched ruby laser is directed into a power amplifier that also includes a broadband gain element doped with trivalent chromium ions (Cr3+). The amplified linear chirped pulsed output beam is directed into the optically pumped power amplifier to produce a high energy linear chirped pulsed output beam which is then directed into a pulse compressor to produce the ultrashort pulsed output beam.
Patent•
08 Feb 2018
TL;DR: In this paper, a diode pumped solid state laser is provided which includes a ruby crystal optical gain medium and a high bandgap semiconductor laser diode or light emitting diode (LED) pump source to directly optically pump the gain medium.
Abstract: A diode pumped solid state laser is provided which includes a ruby crystal optical gain medium and a high bandgap semiconductor laser diode (LD) or light emitting diode (LED) pump source to directly optically pump the gain medium. The high-bandgap semiconductor LD or LED is a semiconductor device whose chemical composition is chosen to provide output radiation at an approximate wavelength of ˜405 nm. The ruby crystal produces laser output at the relatively short wavelength of ˜694 nm.