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erbium laser

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https://www.readbyqxmd.com/read/28303946/preparation-of-ho-3-tm-3-co-doped-lanthanum-tungsten-germanium-tellurite-glass-fiber-and-its-laser-performance-for-2-0%C3%A2-%C3%AE-m
#1
Dechun Zhou, Xuemei Bai, Hang Zhou
Ho(3+)/Tm(3+) co-doped 50TeO2-25GeO2-3WO3-5La2O3-3Nb2O5-5Li2O-9BaF2 glass fiber is prepared with the rod-tube drawing method of 15 μm core diameter and 125 μm inner cladding diameter applied in the 2.0 μm-infrared laser. The 2.0 μm luminescence properties of the core glass are researched and the fluorescence intensity variation for different Tm(3+) doping concentration is systematically analyzed. The results show that the 2.0 μm luminescence of Ho(3+) is greatly influenced by the doping concentration ratio of Ho(3+) to Tm(3+) and that the maximum fluorescence intensity of the core glass can be obtained and its emission cross section can reach 0...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28299490/molecular-effects-of-fractional-ablative-erbium-yag-laser-treatment-with-multiple-stacked-pulses-on-standardized-human-three-dimensional-organotypic-skin-models
#2
Laurenz Schmitt, P M Amann, Y Marquardt, R Heise, K Czaja, P A Gerber, T Steiner, F Hölzle, Jens Malte Baron
The molecular changes in gene expression following ablative laser treatment of skin lesions, such as atrophic scars and UV-damaged skin, are not completely understood. A standardized in vitro model of human skin, to study the effects of laser treatment on human skin, has been recently developed. Therefore, the aim of the investigation was to examine morphological and molecular changes caused by fractional ablative erbium:YAG laser treatment on an in vitro full-thickness 3D standardized organotypic model of human skin...
March 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28296519/congenital-melanocytic-nevus-on-the-lower-eyelid-treated-with-continuous-wave-and-superpulsed-co2-laser-followed-by-erbium-laser
#3
Vito Abrusci, Valentina Benzecry
There are several therapeutic options to treat congenital melanocytic nevi. The motivations for the treatment of small- to medium-sized congenital nevi located on the face or other sensitive areas are frequently cosmetic. The choice of therapy depends on the operator's expertise and on the likelihood of improved cosmesis. We report a case of a medium-sized congenital nevi located on the lower eyelid, successfully treated with a combination of ablative lasers with a single surgical procedure. We achieved an excellent clinical and cosmetic result...
February 17, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28275785/-histological-evaluations-on-periapical-tissues-after-irradiation-by-erbium-doped-yttrium-aluminum-garnet-laser-in-labradors-dogs
#4
Hao-Ming Wang, Meng-Qi Zhou, Jin Hong
PURPOSE: To investigate the thermal effects on periapical tissues of Labrador dogs after intra-canal irradiation by erbium-doped yttrium aluminum garnet (Er:YAG) laser at different powers based on the antibacterial experiment of Enterococcus faecalis and Escherichia coli in root canals with an isthmus, to assess the histological changes, and to prove the safety for clinical applications. METHODS: Two hundred root canals of 10 healthy adult Labradors dogs were selected and divided into 5 groups...
December 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28275279/influence-of-laser-activated-irrigation-with-two-erbium-lasers-on-bond-strength-of-inidividually-formed-fiber-reinforced-composite-posts-to-root-canal-dentin
#5
Ivana Parčina, Amižić, Ivana Miletić, Andrei C Ionescu, Eugenio Brambilla, Dragana Gabrić, Anja Baraba
OBJECTIVE: The aim of this in vitro study was to investigate the effect of laser activated irrigation (LAI) using two erbium lasers on bond strength of individually formed fiber-reinforced composite (FRC) posts to root canal dentin. MATERIALS AND METHODS: Twenty-seven single-rooted human teeth were endodontically treated and after post space preparation divided into three groups (n=9 per group), according to the pre-treatment of post space preparation: 1) Conventional syringe irrigation (CSI) and saline; 2) Er...
December 2016: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/28239750/light-and-laser-treatment-modalities-for-disseminated-superficial-actinic-porokeratosis-a-systematic-review
#6
Gregory A Aird, Jenna L Sitenga, Austin Huy Nguyen, Adam Vaudreuil, Christopher J Huerter
Treatment of disseminated superficial actinic porokeratosis (DSAP) is poorly standardized. The present review seeks to comprehensively discuss the potential for laser and light modalities in the treatment of DSAP. A systematic review of light and laser treatment modalities was conducted to include 26 cases of patients with DSAP. Systematic review resulted in 14 articles to be included. Photodynamic therapy (PDT) overall was the least successful treatment modality, with clinical improvement seen in a minority of patients (MAL-PDT: N = 9 patients, 33...
February 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28231079/vaginal-erbium-laser-as-second-generation-thermotherapy-for-the-genitourinary-syndrome-of-menopause-a-pilot-study-in-breast-cancer-survivors
#7
Marco Gambacciani, Marco Levancini
OBJECTIVE: The aim of this study was to evaluate the efficacy and acceptability of a second generation of vaginal laser treatment, the vaginal erbium laser, as a nonablative photothermal therapy for the management of genitourinary syndrome of menopause in postmenopausal breast cancer survivors. METHODS: The study was performed using an erbium laser crystal yttrium-aluminum-garnet (XS Fotona Smooth, Fotona, Ljubljana, Slovenia) with a wavelength of 2,940 nm. Forty-three postmenopausal breast cancer survivors were treated with three laser applications every 30 days...
March 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28223745/intense-pulsed-light-alone-and-in-combination-with-erbium-yttrium-aluminum-garnet-laser-on-small-to-medium-sized-congenital-melanocytic-nevi-single-center-experience-based-on-retrospective-chart-review
#8
Mi So Lee, Hee Jin Jun, Sang Hyun Cho, Jeong Deuk Lee, Hei Sung Kim
BACKGROUND: Treatment of congenital melanocytic nevi (CMN) with intense pulsed light (IPL) has recently produced promising results. OBJECTIVE: To evaluate the clinical and histological outcomes of small-to-medium sized CMN treated with IPL alone and in combination with erbium: yttrium-aluminum-garnet (Er: YAG) laser. METHODS: We performed a retrospective chart review of 26 small-to-medium sized CMN treated as described above. The reduction in visible pigmentation, signs of recurrence and any adverse skin changes were evaluated by two independent clinicians...
February 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28214427/intense-2-7%C3%AE-m-emission-in-er-3-doped-zinc-fluoride-glass
#9
Feifei Huang, Yanyan Guo, Ying Tian, Shiqing Xu, Junjie Zhang
A novel erbium ion doped zinc fluoride glass was prepared. 2.7μm emission and transmittance properties together with thermal ability were investigated. An enhanced 2.7μm emission was observed by introducing ZnF2 in the ZrF4-based fluoride glass. Meanwhile, the J-O parameters and branching ratios (β) of Er(3+)-doped zinc fluoride glass were calculated and analyzed. The present Er(3+)-doped zinc fluoride glass with large emission cross-section (0.92×10(-20)cm(2)) and long decay lifetime (2.05ms) at 2.7μm indicates that it have very promising applications for solid state lasers around 3μm...
February 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28211471/phosphorene-quantum-dot-saturable-absorbers-for-ultrafast-fiber-lasers
#10
J Du, M Zhang, Z Guo, J Chen, X Zhu, G Hu, P Peng, Z Zheng, H Zhang
We fabricate ultrasmall phosphorene quantum dots (PQDs) with an average size of 2.6 ± 0.9 nm using a liquid exfoliation method involving ultrasound probe sonication followed by bath sonication. By coupling the as-prepared PQDs with microfiber evanescent light field, the PQD-based saturable absorber (SA) device exhibits ultrafast nonlinear saturable absorption property, with an optical modulation depth of 8.1% at the telecommunication band. With the integration of the all-fiber PQD-based SA, a continuous-wave passively mode-locked erbium-doped (Er-doped) laser cavity delivers stable, self-starting pulses with a pulse duration of 0...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28210823/non-ablative-erbium-yag-laser-for-the-treatment-of-type-iii-stress-urinary-incontinence-intrinsic-sphincter-deficiency
#11
Adrian Gaspar, Hugo Brandi
The objective of this pilot study was to determine the safety and efficacy of a new non-ablative erbium YAG laser procedure for the treatment of type III stress urinary incontinence (intrinsic sphincter deficiency) in women. Twenty-two patients with a Valsalva leak point pressure less than 60 cm H2O were recruited and treated with a non-ablative erbium laser delivering low fluence pulses inside the whole length of the urethra through a specially designed cannula. Treatment consisted of two treatment sessions with a 3-week interval in-between...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28186148/measurement-of-absolute-frequency-of-continuous-wave-terahertz-radiation-in-real-time-using-a-free-running-dual-wavelength-mode-locked-erbium-doped-fibre-laser
#12
Guoqing Hu, Tatsuya Mizuguchi, Xin Zhao, Takeo Minamikawa, Takahiko Mizuno, Yuli Yang, Cui Li, Ming Bai, Zheng Zheng, Takeshi Yasui
A single, free-running, dual-wavelength mode-locked, erbium-doped fibre laser was exploited to measure the absolute frequency of continuous-wave terahertz (CW-THz) radiation in real time using dual THz combs of photo-carriers (dual PC-THz combs). Two independent mode-locked laser beams with different wavelengths and different repetition frequencies were generated from this laser and were used to generate dual PC-THz combs having different frequency spacings in photoconductive antennae. Based on the dual PC-THz combs, the absolute frequency of CW-THz radiation was determined with a relative precision of 1...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28166434/a-systematic-review-of-comparative-studies-of-co2anderbium-yag-lasers-in-resurfacing-facial-rhytides-wrinkles
#13
Kee-Hsin Chen, Ka-Wai Tam, I-Fan Chen, Shihping Kevin Huang, Pei-Chuan Tzeng, Hsian-Jenn Wang, Chiehfeng Cliff Chen
BACKGROUND: Laser resurfacing is used to minimize wrinkles, solar scars, and sequelae of acne. OBJECTIVE: Purpose of the systemic review was to compare resurfacing outcomes of CO2 laser and erbium: yttrium-aluminum-garnet (erb:YAG) laser therapies. METHODS AND MATERIALS: Medline, Cochrane, EMBASE, Google Scholar databases were searched until April 9, 2015 using the following terms: laser, carbon dioxide/CO2, facial wrinkles, rhytides, erbium-doped yttrium aluminum garnet/erbium:YAG/Er:YAG...
February 6, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28158036/two-octave-spanning-supercontinuum-generation-in-stoichiometric-silicon-nitride-waveguides-pumped-at-telecom-wavelengths
#14
Marco A G Porcel, Florian Schepers, Jörn P Epping, Tim Hellwig, Marcel Hoekman, René G Heideman, Peter J M van der Slot, Chris J Lee, Robert Schmidt, Rudolf Bratschitsch, Carsten Fallnich, Klaus-J Boller
We demonstrate supercontinuum generation in stoichiometric silicon nitride (Si<sub>3</sub>N<sub>4</sub> in SiO<sub>2</sub>) integrated optical waveguides, pumped at telecommunication wavelengths. The pump laser is a mode-locked erbium fiber laser at a wavelength of 1.56 µm with a pulse duration of 120 fs. With a waveguide-internal pulse energy of 1.4 nJ and a waveguide with 1.0 µm × 0.9 µm cross section, designed for anomalous dispersion across the 1500 nm telecommunication range, the output spectrum extends from the visible, at around 526 nm, up to the mid-infrared, at least to 2...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28158014/tunable-erbium-doped-microbubble-laser-fabricated-by-sol-gel-coating
#15
Yong Yang, Fuchuan Lei, Sho Kasumie, Linhua Xu, Jonathan M Ward, Lan Yang, Síle Nic Chormaic
In this work, we show that the application of a sol-gel coating renders a microbubble whispering gallery resonator into an active device. During the fabrication of the resonator, a thin layer of erbium-doped sol-gel is applied to a tapered microcapillary, then a microbubble with a wall thickness of 1.3 μm is formed with the rare earth ions diffused into its wall. The doped microbubble is pumped at 980 nm and lases in the emission band of the Er<sup>3+</sup> ions at 1535 nm. The laser wavelength can be shifted by aerostatic pressure tuning of the whispering gallery modes of the microbubble...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28157873/co-precipitation-of-rare-earth-doped-y-sub-2-sub-o-sub-3-sub-and-mgo-nanocomposites-for-mid-infrared-solid-state-lasers
#16
Victoria L Blair, Zackery D Fleischman, Larry D Merkle, Nicholas Ku, Carli A Moorehead
Mid-infrared, solid-state laser materials face three main challenges: (1) need to dissipate heat generated in lasing; (2) luminescence quenching by multiphonon relaxation; and (3) trade-off in high thermal conductivity and small maximum phonon energy. We are tackling these challenges by synthesizing a ceramic nanocomposite in which multiple phases will be incorporated into the same structure. The undoped majority species, MgO, will be the main carrier of high thermal conductivity, and the minority species, Er:Y<sub>2</sub>O<sub>3</sub>, will have low maximum phonon energy...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28146480/prediction-performance-of-reservoir-computing-systems-based-on-a-diode-pumped-erbium-doped-microchip-laser-subject-to-optical-feedback
#17
Romain Modeste Nguimdo, Eric Lacot, Olivier Jacquin, Olivier Hugon, Guy Van der Sande, Hugues Guillet de Chatellus
Reservoir computing (RC) systems are computational tools for information processing that can be fully implemented in optics. Here, we experimentally and numerically show that an optically pumped laser subject to optical delayed feedback can yield similar results to those obtained for electrically pumped lasers. Unlike with previous implementations, the input data are injected at a time interval that is much larger than the time-delay feedback. These data are directly coupled to the feedback light beam. Our results illustrate possible new avenues for RC implementations for prediction tasks...
February 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28128340/ultrafast-nonlinear-optical-properties-of-thin-solid-dna-film-and-their-application-as-a-saturable-absorber-in-femtosecond-mode-locked-fiber-laser
#18
Reza Khazaeinezhad, Sahar Hosseinzadeh Kassani, Bjorn Paulson, Hwanseong Jeong, Jiyoon Gwak, Fabian Rotermund, Dong-Il Yeom, Kyunghwan Oh
A new extraordinary application of deoxyribonucleic acid (DNA) thin-solid-film was experimentally explored in the field of ultrafast nonlinear photonics. Optical transmission was investigated in both linear and nonlinear regimes for two types of DNA thin-solid-films made from DNA in aqueous solution and DNA-cetyltrimethylammonium chloride (CTMA) in an organic solvent. Z-scan measurements revealed a high third-order nonlinearity with n2 exceeding 10(-9) at a wavelength of 1570 nm, for a nonlinarity about five orders of magnitude larger than that of silica...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28124198/laser-assisted-topical-corticosteroid-delivery-for-the-treatment-of-keloids
#19
Ji Hye Park, Ji Young Chun, Jong Hee Lee
Laser-assisted drug delivery has generated intense interest. The objectives of this study are to evaluate the clinical benefit of laser-assisted corticosteroid delivery and to compare this technique to corticosteroid intralesional injection, a standard treatment for keloids. Patients with keloids on the left shoulder after BCG vaccination were enrolled in this study. The entire lesion was first treated with an ablative fractional erbium-YAG laser. After this treatment, the lesion was divided into two halves...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28121513/evaluation-of-mineral-content-and-photon-interaction-parameters-of-dental-enamel-after-phosphoric-acid-and-er-yag-laser-treatment
#20
Huseyin Simsek, Taskın Gurbuz, Suleyman Kutalmış Buyuk, Yuksel Ozdemir
OBJECTIVE: The purpose of this study was to evaluate the effects of laser and acid etching on the mineral content and photon interaction parameters of dental enamel in human teeth. BACKGROUND DATA: The composition of dental enamel may vary, especially at the surface, depending on the reactions that occur during dental treatment. MATERIALS AND METHODS: Forty maxillary premolars were divided randomly into 2 groups of 20 teeth. In the first group, half of teeth crowns were etched by using 37% phosphoric acid; in the second group, half of teeth crowns were etched by using an erbium:yttrium-aluminum-garnet (Er:YAG) laser...
January 24, 2017: Photomedicine and Laser Surgery
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