TY - JOUR. T1 - Time-resolved laser-induced fluorescence spectroscopy as a diagnostic instrument in head and neck carcinoma. AU - Meier, Jeremy D.. AU - Xie, Hongtao. AU - Sun, Yang. AU - Sun, Yinghua. AU - Hatami, Nisa. AU - Poirier, Brian. AU - Marcu, Laura. AU - Farwell, D Gregory. PY - 2010/6. Y1 - 2010/6. N2 - Objective: The objectives of this study were to 1) determine differences in lifetime fluorescence between normal and malignant tissue of the upper aerodigestive tract, and 2) evaluate the potential of time-resolved laser-induced fluorescence spectroscopy (TR-LIFS) as a diagnostic instrument for head and neck squamous cell carcinoma (HNSCC). Study Design: Cross-sectional study. Setting: University-based medical center. Subjects and Methods: Nine patients with suspected HNSCC were included. In the operating room, a nitrogen pulse laser (337 nm, 700-picosecond pulse width) was used to induce tissue autofluorescence of normal tissue and suspected malignant lesions. Spectral intensities ...
We present a lateral laser speckle contrast analysis method combined with line beam scanning illumination to improve the sampling depth of blood flow imaging. Both the phantom and animal experimental results suggest that localized illumination and lateral speckle contrast analysis can significantly enhance the deep blood flow signal to improve the sampling depth of laser speckle contrast imaging compared with the traditional full-field illumination laser speckle contrast analysis method.. © 2012 Optical Society of America. Full Article , PDF Article ...
The strongly localized interaction process of ultrashort laser pulses with tissue makes femtosecond lasers a powerful tool for eye surgery. These lasers are now routinely used in refractive surgery and other forms of surgery of the anterior segment of the eye. Several clinical laser systems also offer options for corneal grafting and the potential use of ultrashort pulse lasers in glaucoma surgery has been the object of several recent studies which have shown promising results. While devices aimed for interventions in clear tissue may be based on available solid state or fibre laser technology, the development of tools for surgery in more strongly scattering tissue has to account for the compromised tissular transparency and requires the development of optimized laser sources. The present paper focuses on surgery of clear and pathological cornea as well as sclera. It aims to give an overview over typical medical indications for ultrashort pulse laser surgery, the optics of the tissues involved, the
China Osram 3.8mm 520nm 80MW Green Laser Diode for Display (PL520B), Find details about China 80MW Green Laser Diode, 520nm 80MW Laser Diode from Osram 3.8mm 520nm 80MW Green Laser Diode for Display (PL520B) - Dongguan Blueuniverse Laser Co., Ltd.
Endoscopic resection of early colorectal neoplasms typically employs electrocautery tools, which lack precision and run the risk of full thickness thermal injury to the bowel wall with subsequent perforation. We present a means of endoluminal colonic ablation using picosecond laser pulses as a potential alternative to mitigate these limitations. High intensity ultrashort laser pulses enable nonlinear absorption processes, plasma generation, and as a consequence a predominantly non-thermal ablation regimen.. Robust process parameters for the laser resection are demonstrated using fresh ex vivo pig intestine samples. Square cavities with comparable thickness to early colorectal neoplasms are removed for a wavelength of 1030 nm and 515 nm using a picosecond laser system. The corresponding histology sections exhibit in both cases only minimal collateral damage to the surrounding tissue. The ablation depth can be controlled precisely by means of the pulse energy. Overall, the application of ultrafast ...
A self-mode-locked ring cavity laser incorporating a laser crystal such as Ti:Sapphire includes an external cavity for producing self-starting of mode-locked operation. The external cavity receives a portion of one of the continuous wave beams from the ring cavity modulates it, and retroreflects it back to the ring cavity to initiate mode-locked unidirectional operation. The unidirectional mode-locked operation is in a direction which decouples the external cavity.
A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diodes junction. Laser diodes are the most common type of lasers produced, with a wide range of uses that include fiber optic communications, barcode readers, laser pointers, CD/DVD/Blu-ray disc reading/recording, laser printing, laser scanning and light beam illumination. A laser diode is electrically a PIN diode. The active region of the laser diode is in the intrinsic (I) region, and the carriers (electrons and holes) are pumped into that region from the N and P regions respectively. While initial diode laser research was conducted on simple P-N diodes, all modern lasers use the double-hetero-structure implementation, where the carriers and the photons are confined in order to maximize their chances for recombination and light generation. Unlike a regular diode, the goal for a laser diode is to recombine all carriers in the I ...
Age-related macular degeneration (AMD) is a condition affecting the retina and is the leading cause of vision loss. Dry AMD is caused by the accumulation of lipid deposits called drusen, which form under the retina. This work demonstrates, for the first time, the removal of drusen-like deposits underneath ARPE-19 cell layers using femtosecond laser pulses. A novel cell culture model was created in response to the limited access to primary cell lines and the absence of animal models that recapitulate all aspects of AMD. In the cell culture model, deposits were identified with fluorescent stains specific to known deposit constituents. Trains of sub-10 femtosecond laser pulses from a Ti:Sapphire laser were used to successfully ablate the deposits without causing damage to surrounding cells. This drusen removal method can be used as a potential treatment for dry-stage AMD.
We report on the frequency doubling of femtosecond laser pulses at 1030 nm center wavelength generated from the fully diode-pumped laser system POLARIS. The newly generated pulses at a center wavelength of 515 nm have a pulse energy of 3 J with a pulse duration of 120 fs. On the basis of initially ultra-high contrast seed pulses we expect a temporal intensity contrast better 10 17 200 ps before the peak of the main pulse. We analyzed the temporal intensity contrast from milliseconds to femtoseconds with a dynamic range covering more than 20 orders of magnitude. The pulses were focussed with a f/2-focussing parabola resulting in a peak intensity exceeding 10 20 W / cm 2 . The peak power and intensity
Laser-induced breakdown spectroscopy (LIBS) has been used to study bacterial spores, molds, pollens, and proteins. Biosamples were prepared and deposited onto porous silver substrates. LIBS data from the individual laser shots were analyzed by principal-components analysis and were found to contain adequate information to afford discrimination among the different biomaterials. Additional discrimination within the three bacilli studied appears feasible.. © 2003 Optical Society of America. Full Article , PDF Article ...
We demonstrate an endoscopic imaging system for microscopic flow measurement (for example blood flow in tissue) using laser speckle contrast imaging. Computa...
Airborne silica dust (quartz) is common in coal mines and represents a respiratory hazard that can lead to silicosis, a potentially fatal lung disease. With an eye toward developing a portable monitoring device for rapid analysis of silica dust, laser-induced breakdown spectroscopy (LIBS) was used to quantify quartz in coal dust samples collected on filter media. Pure silica [Min-U-Sil(TM) 5], Geo
An electron microscope study has been made of vitally stained single cells whose cytoplasm has been subjected to a localized ruby laser microbeam. Light and moderate laser absorption (the resultant of stain concentration and laser energy density) produced restricted selective damage of mitochondria in cells stained with Janus green B; heavy laser absorption resulted in mitochondrial damage, as well as in nonselective interaction with other cell structures. With four other basic vital stains, the polysomes, ergastoplasm, mitochondria and other organelles at the irradiated site were uniformly damaged. Unstained cells showed no morphological alterations. With light primary damage (that restricted to the irradiation site), no secondary effects of the incident radiation were observed. With moderate primary damage, however, secondary damage of the mitochondria in the unirradiated cell portions was produced, which was reversible within 4 hr after irradiation. Heavy primary lesions caused severe ...
The cell selective introduction of therapeutic agents remains a challenging problem. Here we demonstrate spatially controlled cavitation instigated by laser-induced breakdown of an optically trapped single gold nanoparticle of diameter 100 nm. The energy breakdown threshold of the gold nanoparticle with a single nanosecond laser pulse at 532 nm is three orders of magnitude lower than water, which leads to nanocavitation allowing single cell transfection. We quantify the shear stress to cells from the expanding bubble and optimize the pressure to be in the range of ...
A study was made of the effects of laser radiation on the structure and function of the primate retina. The program encompasses the ocular effects of pulsed and CW laser radiation through: (1) Anatomical studies of laser-exposed and non-exposed tissue at the resolution of both light and electron optics. These are directed toward studies of the chemical morphology of retinal structures through enzyme and other staining techniques. (2) Analysis of bioelectric potentials in the visual system. The electroretinogram recorded from the intact eye is used to follow long-term effects of laser radiation. The LERG (localized electroretinogram) will be used to study localized effects of laser radiation. Single unit recording from the fourth-order neurons (LGN) of the visual system will be used to study photochemical effects of laser radiation. (3) Laser-induced changes in retinal metabolism are being investigated through autoradiographic studies of C14 labeled vitamin A. (4) Laser exposures of the macula
Absolute values of the two-photon absorption cross-sections of Rhodamine 6G, Rhodamine B, Acridine Red, Disodium Fluorescein and DODCI have been obtained by excitation with a neodymium: glass laser (1060 nm). Measurements over eight orders of magnitude of the exciting light flux were carried out by employing the laser both Q-switched and mode-locked. The two-photon fluorescence flux measurements were calibrated by single-photon fluorescence generated by excitation with second-harmonic laser pulses. The experimental results are compared with values predicted by semi-empirical theoretical models and good agreement is obtained. Two-photon amplification of the mode-locked neodymium laser by organic dyes is shown not to be practicable at present. Other possible two-photon oscillators are discussed. ...
Laser diffraction analysis, also known as laser diffraction spectroscopy, is a technology that utilizes diffraction patterns of a laser beam passed through any object ranging from nanometers to millimeters in size to quickly measure geometrical dimensions of a particle. This process does not depend on volumetric flow rate, the amount of particles that passes through a surface over time. Laser diffraction analysis is based on the Fraunhofer diffraction theory, stating that the intensity of light scattered by a particle is directly proportional to the particle size. The angle of the laser beam and particle size have an inversely proportional relationship, where the laser beam angle increases as particle size decreases and vice versa. Laser diffraction analysis is accomplished via a red He-Ne laser, a commonly used gas laser for physics experiments that is made up of a laser tube, a high-voltage power supply, and structural packaging. Alternatively, blue laser diodes or LEDs of shorter wavelength ...
A Continuous Wave (CW) sub-THz photonic synthesis setup based on a single Passively Mode-Locked Laser Diode (PMLLD) acting as a monolithic Optical Frequency Comb Generator (OFCG) and highly selective optical filtering has been implemented to evaluate the phase noise performance of the generated sub-THz signals. The analysis of the synthesized sub-THz signals up to 120 GHz gives as a result an effective reduction of the electrical linewidth when compared to direct harmonic generation that begins at 50 GHz and becomes greater as the frequency increases. The phase noise reduction offered by the setup, along with its integration potential, cost and bandwidth, make it a promising candidate to the development of an integrated and high performance low phase noise local oscillator in the sub-THz range ...
A laser medical device for delivering energy to tissue to be treated. The device includes a laser energy transmitting conduit having a longitudinal axis, and has a proximal end for connection to a source of laser energy and a distal end from which laser energy transmitted by the conduit is emitted. A laser energy redirecting member is located adjacent the distal end of the conduit for redirecting the laser energy in a lateral direction with respect to the axis of the conduit, and a tissue contact member is provided adjacent the laser energy redirecting member. The tissue contact member has a transverse cross section of preselected shape and a longitudinal axis generally transverse to the axis of the conduit. The tissue contact member further has an input surface for receiving laser energy redirected by the laser energy redirecting member and transmitting the laser energy received from the laser energy redirecting member. The tissue contact member terminates in a tissue contact surface having a radius of
China Mitsubishi 658nm 200MW Red Laser Diode for Slimming Lipo-Machine (ML101J29-G), Find details about China Laser Diode 660nm 200MW, 660nm 200MW Laser Diode from Mitsubishi 658nm 200MW Red Laser Diode for Slimming Lipo-Machine (ML101J29-G) - Dongguan Blueuniverse Laser Co., Ltd.
Vopr Kurortol Fizioter Lech Fiz Kult. 1995 Sep-Oct;(5):10-3.. [The action of low-intensity infrared laser radiation on skin afferents] [Article in Russian] Ponomarenko GN, Enin LD.. Laser radiation modulates functional characteristics of mechanoreceptors. This inhibits impulse activity of the nerve endings from pain focus and reduces pain sensitivity of skin afferents, excitability of conductive nerve fibers. Changes in sensitivity become more pronounced with increasing duration of the exposure. By means of reflectory mechanism laser radiation may cause other general reactions of the body and enhance immune response of the skin ...
In extreme ultraviolet laser ablation MSI, bright laser pulses from a compact 46.9-nm-wavelength laser [1] are focused into nanometer size spots to ablate craters a few nanometers deep on selected regions of the sample. Elemental and molecular ions in the laser-created plasma are extracted and identified by their mass-to-charge ratio (m/z) using a time-of-flight mass spectrometer. Analysis of the spatially resolved mass spectra obtained as the sample is displaced with respect to the focused laser beam enables one to construct 3-D composition images with nanoscale resolution [2]. In this talk I will describe recent advances of extreme ultraviolet MSI that show its unique capabilities to identify low concentration of high Z elements into glass matrices, and to map molecular composition of single micro-organisms in 3-D at the nanoscale. [1] S. Heinbuch et al, "Demonstration of a desk-top size high repetition rate soft x-ray laser," Opt. Express vol. 13, 4050-4055 (2005). [2] I. Kuznetsov et al, ...
Jefferson Labs Free-Electron Laser is the worlds highest-power tunable infrared laser and was developed using the labs expertise in superconducting radiofrequency (SRF) accelerators. The FEL also provides ultraviolet laser light, including vacuum ultraviolet light, and is also a source of Terahertz light. The FEL uses electrons to produce laser light. The electrons are energized using the labs superconducting accelerator technology and then steered into a wiggler.
In an annealing process of illuminating a semiconductor thin film with laser light, in the case where the laser illumination is performed at an energy level that is lower than an output energy range that allows a laser apparatus to operate most stably, the laser output is fixed somewhere in the above output energy range and the illumination energy is changed by inserting or removing a light attenuation filter into or from the laser illumination optical path. As a result, the time required for the laser processing can be shortened.
What is the difference between red and green laser pointer? 1.Wavelength difference. Red laser wavelength is between 635nm to 780nm. Green laser wavelength is 515nm, 520nm and 532nm. 2.Different light emitting mode. Red laser pointer emit light directly from laser diode, without extract devices. It emits bright light directly from red laser diode. 532nm green laser light is emitting from 808nm laser diode pump crystal. Why violet laser pointer light spot is very weak? According to the
Plant Analysis by Laser Induced Breakdown Spectroscopy (LIBS) - Agriculture - Agriculture Monitoring and Testing by Applied Spectra, Inc.. Laser-induced breakdown spectroscopy (LIBS) offers the ability to analyze plant samples with little to no sampl...
OBJECTIVE: Laser stimulation of Adelta-fibre nociceptors in the skin evokes nociceptive-specific brain responses (laser-evoked potentials, LEPs). The largest vertex complex (N2-P2) is widely used to assess nociceptive pathways in physiological and clinical studies. The aim of this study was to develop an automated method to measure amplitudes and latencies of the N2 and P2 peaks on a single-trial basis. METHODS: LEPs were recorded after Nd:YAP laser stimulation of the left hand dorsum in 7 normal volunteers. For each subject, a basis set of 4 regressors (the N2 and P2 waveforms and their respective temporal derivatives) was derived from the time-averaged data and regressed against every single-trial LEP response. This provided a separate quantitative estimate of amplitude and latency for the N2 and P2 components of each trial. RESULTS: All estimates of LEP parameters correlated significantly with the corresponding measurements performed by a human expert (N2 amplitude: R2=0.70; P2 amplitude: R2=0.70; N2
In annealing a non-single crystal silicon film through the use of a linear laser beam emitted by a YAG laser of a light source, it is the object of the present invention to prevent heterogeneity in energy caused by an optical interference produced in the linear laser beam from having an effect on the silicon film. The laser beam is divided by a mirror 604 shaped like steps into laser beams which have an optical path difference larger than the coherence length of the laser beam between them. The divided laser beams are converged on an irradiate surface 611 by the action of a cylindrical lens array 605 and a cylindrical lens 606 to homogenize the energy of the laser beam in the length direction and to determine the length of the linear laser beam. On the other hand, the laser beams divided by a cylindrical lens array 607 are converged on the irradiate surface 611 by a cylindrical lens 608 and a doublet cylindrical lens 609 to homogenize the energy in the width direction of the laser beam and to determine
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In the quantum world, making the simple atom behave is one thing, but making the more complex molecule behave is another story. Now scientists have figured out an elegant way to stop a molecule from tumbling so that its potential for new applications, such as quantum computing, can be harnessed: shine a single laser on a trapped molecule and it instantly cools to the temperature of outer space, stopping the rotation of the molecule.
Zhu, Guanghao et al. "Simultaneous Spatial And Temporal Focusing Of Femtosecond Pulses". Conference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologiesconference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologies. Baltimore, Maryland: Optical Society of America, 2005. CWP1. Web. Conference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologiesconference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologies ...
Zhu, Guanghao et al. "Simultaneous Spatial And Temporal Focusing Of Femtosecond Pulses". Conference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologiesconference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologies. Baltimore, Maryland: Optical Society of America, 2005. CWP1. Web. Conference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologiesconference On Lasers And Electro-Optics/quantum Electronics And Laser Science And Photonic Applications Systems Technologies ...
Extremely compact high-power fiber lasers operating at eye-safe telecom wavelength of 1.5 µm have been achieved by systematic experimental studies. Heavily Er3+-Yb3+- codoped phosphate glasses have been chosen as the host glass for our fibers and 1.5 µm lasers have been realized when pumped with 975 nm laser diodes. The first short-length cladding-pumped fiber laser with watt-level CW output power has been demonstrated by an 11-cm-long doped step-index phosphate fiber. Without active cooling, 1.5 W output power at 1535 nm has been obtained. Thermoelectric cooler has been used for heavily doped phosphate step-index fibers. A dual-end-pumped actively cooled fiber laser has generated more than 11 W CW output power at 1535 nm from an 11.9 cm long active fiber. A fully 3-dimensional thermal analysis has been performed to calculate the internal temperature distribution of the shortlength fiber laser and the simulated results have been experimentally verified. Phosphate glass microstructured optical ...
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Hello everyone I completely agree with Mario that a 532 nm green laser can certainly be compatible with FITC detection if the correct bandpass filter is used. I ve also talked with several LSR II users who think they see high backgrounds in their FITC channel when exciting PE with a 532 nm laser, and the cause is definitely a FITC filter that insufficiently excludes green laser light. If you explain to the filter manufacturer that you will be using a green DPSS in your system, they can readily produce a short green filter with these characteristics. We ve used both 532 and 561 nm lasers to excite PE, and both lasers are significantly superior to 488 nm. A word of caution, however if you are using a 561 nm laser to excite PE, the traditional 575/26 and 585/42 nm bandpass filters traditionally used for PE detection are too close to the 561 nm emission, and are not adequately blocked for this laser line. You need to go to a slightly longer filter. In our original Cytometry paper, we used a 610/20 ...
China Tube Power Supply for CO2 Laser Cutting and Engaving Machine, Find details about China CO2 Laser Power Supply, Laser Power Supply from Tube Power Supply for CO2 Laser Cutting and Engaving Machine - Perfect Laser (Wuhan) Co., Ltd.
Laser speckle contrast imaging (LSCI) has been widely used to determine blood flow and perfusion in biological tissues. The physical model of traditional LSCI ignores the effects of scattering property distribution in relation to speckle correlation time τc and blood flow v, which further results in biased estimation. In this study, we developed a dual-wavelength laser speckle contrast imaging (dwLSCI) method and a portable device for imaging the blood flow and tissue perfusion in human hands. Experimental data showed that dwLSCI could retrieve the vein vasculatures under the surface skin, and it further provided accurate measurements of vein blood flow signals, tissue perfusion signals, and fingertip perfusion signals, which assist with assessments of rehabilitation therapy for stroke patients ...
Radiative lifetimes of 94 high-lying even-parity levels from 29 717.231 to 41 692.155 cm−1 of Gd i and 10 high-lying even-parity levels from 38 057.954 to 49 291.082 cm−1 of Gd ii, have been measured using time-resolved laser-induced fluorescence method. The lifetime values range from 7.1 to 220 ns for Gd i and from 5.2 to 47.4 ns for Gd ii. Most results reported here lie within the uncertainty of ±5 per cent. Free neutral and singly ionized gadolinium atoms were generated by laser ablation. The second harmonic of different dye lasers was employed as the tunable UV exciting source (242-337 nm) to excite the investigated levels. A good agreement between our results and the previous ones was achieved. ...
Measurements of the scattering cross section of a number of bare soils have been made with CO/sub 2/ laser illumination at 10.59 /spl mu/m. The primary foc
TY - GEN. T1 - Laser-driven short-duration heating angioplasty. T2 - Photonic Therapeutics and Diagnostics IX. AU - Shimazaki, Natsumi. AU - Naruse, Sho. AU - Arai, Tsunenori. AU - Imanishi, Nobuaki. AU - Aiso, Sadakazu. PY - 2013/5/30. Y1 - 2013/5/30. N2 - The purpose of this study was to investigate the artery dilatation performance of the short-duration heating balloon catheter in cadaver stenotic arteries. We designed a prototype short-duration heating balloon catheter that can heat artery media to around 60 °C in 15-25 s by a combination of laser-driven heat generation and continuous fluid irrigation in the balloon. We performed ex vivo short-duration heating dilatation in the cadaver atherosclerotic femoral arteries (initial percent diameter stenosis was 36-98%), with the maximum balloon temperature of 65±5 °C, laser irradiation duration of 25 s, and balloon dilatation pressure of 3.5 atm. The artery lumen configurations before and after the dilatations were assessed with a commercial ...
Wavelength Scaling Experiments at the Argus Laser Facility. E. M. Campbell, R. E. Turner, F. Ze, P. H. Lee, B. Pruett, G. Tirsell, G. Stradling, D. W. Phillion, V. Rupert, H. Kornblum, L. Koppel, D. L. Matthews, W. C. Mead, K. Estabrook, W. Kruer, C. E. Max, G. Hermes, S. Hildon, and W. Martin. WN7 Conference on Lasers and Electro-Optics (CLEO) 1981 View: PDF. ...
article{bc8bb7eb-0c86-4e93-8039-295fa687f4db, abstract = {Radiative lifetimes of excited states of Zn I (3d(10)4sns S-3(1), n = 6-8; 3d(10) 4snd D-3, n = 4-7) and Zn II (3d(10) 4p P-2(1/2.3/2), 4d D-2(3/2,5/2), 3d(10)5S S-2(1/2)) have been measured using a time-resolved laser-induced fluorescence technique. Single- or two-step excitation of atoms and ions produced by laser ablation was employed. The experimental radiative lifetimes have been compared with theoretical results obtained within a multiconfigurational relativistic Hartree-Fock approach taking core-polarization effects into account.}, author = {Blagoev, KB and Malcheva, G and Penchev, V and Biemont, E and Xu, Huailiang and Persson, Anders and Svanberg, Sune}, issn = {0031-8949}, language = {eng}, number = {6}, pages = {433--440}, publisher = {Institute of Physics Publishing Ltd.}, series = {Physica Scripta}, title = {Radiative lifetimes of Zn I, II excited states}, url = {http://dx.doi.org/10.1238/Physica.Regular.069a00433}, volume = ...
A spark delivery system for generating a spark using a laser beam is provided, and includes a laser light source and a laser delivery assembly. The laser delivery assembly includes a hollow fiber and a launch assembly comprising launch focusing optics to input the laser beam in the hollow fiber. The laser delivery assembly further includes exit focusing optics that demagnify an exit beam of laser light from the hollow fiber, thereby increasing the intensity of the laser beam and creating a spark. Other embodiments use a fiber laser to generate a spark. Embodiments of the present invention may be used to create a spark in an engine. Yet other embodiments include collecting light from the spark or a flame resulting from the spark and conveying the light for diagnostics. Methods of using the spark delivery systems and diagnostic systems are provided.
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The SmartLipo laser system represents the new standard in liposculpture. It is equipped with pulsed 1.064 nm Nd: YAG laser source, emitting an infrared beam, and a diode laser source, emitting a visible red beam. These laser beams rupture the fat cells through fiberoptics consequently melting the fats. The laser beams also deliver heat and energy to the subdermal layers causing the skin to retract, and therefore, skin tightening.. ...
PURPOSE: Nd:YAG laser photodisruption with nanosecond (ns) pulses in the millijoule range is an established tool for intraocular surgery. This study investigates tissue effects in cornea, lens, and retina to assess whether picosecond (ps) pulses with energies in the microjoule range can increase the surgical precision, reduce collateral damage, and allow applications requiring more localized tissue effects than can be achieved with ns pulses. METHODS: Both ps and ns Nd:YAG laser effects on Descemets membrane, in the corneal stroma, in the lens, and at the retina were investigated in vitro in bovine and sheep eyes and in cataractous human lens nuclei. For each tissue, the optical breakdown threshold was determined. The morphology of the tissue effects and the damage range of the laser pulses were examined by light and scanning electron microscopy. The cavitation bubble dynamics during the formation of corneal intrastromal laser effects were documented by time-resolved photography. RESULTS: The ...
... WOBURN Mass. span class xn-chron ...(Photo: a onClick var ss_gi(s_account);s.linkTrackVarsprop5...With Energetiqs LDLS technology a single light source embodied in th...The proprietary laser-driven bulb technology utilized in the LDLS prod...,Energetiq,Introduces,Laser-Driven,Light,Sources,for,Biophysical,Applications,medicine,advanced medical technology,medical laboratory technology,medical device technology,latest medical technology,Health
DOVER, N.J., Nov. 15, 2016 /PRNewswire/ -- Baby-G Takes on Laser Cut Trend. New Collection from Casio Features Perforated Patterns.
... : Used in mint condition 2008 Lumenis Novus Varia. The unit is complete with a Zeiss slitlamp adapter, safety filter, Laser indirect ophthalmoscope. The 3 laser colors are all working up to the maximum output. 1500 milliWatts of 532 Green 600 milliWatts of 561 Yellow 600 milliWatts of 659 Red Green (532 nm) Green laser light is a clinically-proven wavelength that is excellent at targeting the melanin-containing retinal pigment epithelium (RPE), through clear ocular media. It is well suited for a variety of retinal treatments in which melanin is the target chromophore, such as pan-retinal photocoagulation (PRP). Yellow (561 nm) Yellow laser light offers the clinician maximal absorption in hemoglobin with zero or negligible absorption in macular xanthophyll. In addition to easily penetrating through nuclear sclerotic cataracts, the yellow wavelength is desirable when it is
Broad applicability of ultrashort pulses has been demonstrated across many fields in science and technology. The short pulse duration enables the fastest known measurement techniques for chemical reactions and biological processes, as well as the delivery of communications data at ever increasing bit rates. Ultrashort pulses possess large bandwidths, useful in optical frequency metrology and optical coherence tomography. The high peak power available in ultrashort pulses enables athermal machining of metals and dielectrics, and has opened new doors to the study of physics in the presence of the largest-amplitude electric fields ever generated in a laboratory.. While the properties of short duration, broad bandwidth, and high peak power, make ultrashort pulses attractive for many applications, they pose unique challenges in the context of frequency conversion and amplification. This thesis addresses how quasi-phase-matching (QPM) technology is well suited to address these challenges through the ...