NDLI: Laser beam shaping and its effects in medical applications

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2013 International Conference on Advanced Optoelectronics and Lasers (CAOL 2013)

2010 International Conference on Advanced Optoelectronics and Lasers

2008 4th International Conference on Advanced Optoelectronics and Lasers

Proceedings of CAOL 2005. Second International Conference on Advanced Optoelectronics and Lasers, 2005.

Volume 2 - 2005

Volume 1 - 2005

Proceedings of the CAOL 2005. 2nd International Conference on Advanced Optoelectronics and Lasers (IEEE Cat. No. 05TH8809)

Proceedings of CAOL 2005 2nd International Conference on Advanced Optoelectronics and Lasers

Table of contents

Quantum dot photonics: edge emitter, amplifier and VCSEL

Laser beam shaping and its effects in medical applications

Micro-resonators: simulation and application

General theory for distributed reflectors

Fiber lasers for near IR range

Controlling VCSEL polarization by monolithically integrated surface gratings: a survey of modelling and experimental activities

Tradeoffs between threshold and directionality in microdisk laser design

Coherence theory of electromagnetic fields

Multi-beam CO/sub 2/ lasers and theirs applications

High power pulsed lasers and adaptive optics

Patterns and solitons in non linear resonators

Between light-emitting and laser diodes: SLDS

Ultra-thin quantum wells and fractional monolayer quantum dots of II-VI semiconductors for optoelectronic applications

Quantum dot optoelectronic devices

All-optical switching with SOA based devices

Lasing stipulated by multiple random light scattering

A silicon optical bench for flip chip mounting of widely tunable modulated grating Y-branch lasers

New designs and recent experiments on intracavity nonlinear wave mixing in semiconductor lasers

Acousto optically Q-switched and mode locked diode pumped Nd: YVO/sub 4/ laser

Lasing in powdered ZnO: current state of affairs

THz silicon lasers based on donor center transitions

Comparison of highly doped ytterbium-erbium phosphate and silicate glasses for microchip lasers

Investigation of photothermal refractive index changes in novel laser crystals by the transient gratings method

Improvement of the random laser efficiency

Dynamics of a radiation spectrum of the DFDL, excited by radiation of nanosecond duration

Lasing performances of two red benzopyrane dyes in grating cavity with selective pumping

Anisotropy of optical properties of KDP single crystals with organic dye

Modeling of heat transfer and fluid flow during laser welding of aluminum

UV lasing in powdered ZnO excited by nanosecond pumping

Passive shutters for Q-switching continuously diode-pumped Er-glass laser

Laser on the big solar concentrator

The influence of gas mixing ratio on stability of quasi-steady mode of electro-discharge XeCl-lasers operation

The simple excilamp on basis of XeCl-mixture

Closed-loop adaptive optical system with bimorph mirror and Shack-Hartmann wavefront sensor - advantages and limitations

Water-cooled wavefront correctors

Powerful radiation on electronic IR transitions of rare gases in a simple TEA laser

Powerful terahertz CS/sub 2/ laser with optical pumping

Large area silicon position sensitive photo-detector: fabrication and characterization

Mathematical modeling of a high power CW CO/sub 2/ gas-dynamic laser

Experimental investigation on the stability of Nd:YAG laser with SBS phase conjugator

Investigation of ablation species generated by high power laser pulses

Numerical modelling of the laser cladding process using a dynamic mesh approach

Numerical thermodynamic field modeling of a metallic substance during laser welding

Laser-microwave spectroscopy of Au atoms Rydberg states

Epitaxially grown 1.06 /spl mu/m and eye safe microchip lasers

Calculation of kinetics of excitation of pulse generation in ionized calcium

Effect of operating temperature on performance of obliquely deposited Bi, Sb, and Bi-Sb semimetal thin film laser detectors

Variational approach to dispersion-managed soliton propagation under third-order dispersion effects

Stochastic optical solitons in nonlinear media type Kerr

Optimal multilayer mirrors for microresonators in advanced photonic devices

Manifestation of periodically modulated laser beams resonance self-action in saturated absorption spectra and beam propagation

Spiral beams shaped like a planar curve with self-crossings

Pulses transformations in running wave interferometers

Complexificated generalized gaussian beams

Modeling the fine structure of focused optical field at diffraction on a hole with arbitrary shape

Improving micromachining process using a new mode converter system

Modeling and optimization of optical microcavity clusters and photonic crystal defect cavities

Threshold condition for micro-ring cavity lasers with waveguide self-aligned total internal reflectors

Optical field in the presence of two stacked dielectric disks

Multimorph mirrors: a new generation of bimorph mirrors

Half-tone images in laser image projection using saturated laser Fourier-amplifiers

The end of evanescent waves in free space

M2 meter as a part of closed-loop adaptive optical system for high-power laser beam correction

Propagation of submillimeter laser beams along hollow oversized waveguides

Longitudinally modes characteristics of Ince-Gaussian beams in laser resonators with quadratic-index active medium

Matrix description of a Hermite-Laguerre-Gaussian beam transformation in astigmatic optical systems

Research of the shaping of the radiation spectrum of dye laser in a resonator with the spectral selector

Eigenmodes of a two-dimensional elliptical laser resonator

The comparative analysis of the method of Riemann-Hilbert problem variants concerning the wave beam diffraction problem on gratings

Investigation of the thermo-optical distortions in the active element and of quality of generated radiation of the axially-diode pumped solid-state laser

Mode characteristics of vertical-cavity surface-emitting lasers based on GaAs quantum wells

Time-multiplexing of high power laser diodes yields a high brilliance laser beam

Heterolaser spectral parameter tuning under surface acoustic waves

Two-wavelength butt-joint diode lasers for the difference- and sum-frequency generation

Control of radiation polarization in multiple-quantum-well heterostructure laser sources

Finite element analysis and reduce order modeling of tunable vertical cavity laser diode

Development of laser diode layers based upon III-V compound semiconductors in the wavelength range from 0.7 /spl mu/m to 0.9 /spl mu/m

Simulation of photon density distribution in three section tunable DBR laser diode based on the transfer matrix method

The problem of the creation stable p-n junctions with help the methods of relaxed optics in InSb and InAs

Study of the influence of the magnetic field on MQW laser through image processing

Influence of laser diode parameters on the performance of Mach-Zehnder modulator

Investigation in vivo the effect of temperature on quantum yield of photodissociation of oxyhemoglobin (HbO/sub 2/) in cutaneous blood vessels

Influence of laser irradiation on wheat growth

Application of the digital holographic microscope for investigation of human red blood cells

The influence of non-photodynamic reactions on necrosis formation in PDT treatment

Unraveling molecular vibrational energy pathways by laser diagnostics and computer simulations

Photoresponse of thin films of pure and mixed molecular semiconductors in the NIR range

Laser polarimetry and leaf cuticle characteristics

Influence of laserotherapy on the lipid metabolism of the patients with primary hypothyroidism and ishemic heart disease

Confocal laser scanning microscope in the cell biology investigations

Fiber-optic probe for in vivo monitoring photosensitizer concentration from spatially resolved fluorescence and reflectance measurements

Experiment and mechanism investigation on acid resistance of Nd:YAG laser treated enamel

Format A4. Edition 300 copies

Proceedings of CAOL'2003. 1st International Conference on Advanced Optoelectronics and Lasers. Jontly with 1st Workshop on Precision Oscillations in Electronics and Optics (IEEE Cat. No.03EX715)

Laser beam shaping and its effects in medical applications

Content Provider	IEEE Xplore Digital Library
Author	Saghafi, S.
Copyright Year	2005
Description	Author affiliation: Shahid Behshti Univ., Tehran, Iran (Saghafi, S.)
Abstract	Summary form only given. For many medical and industrial laser applications, a particular irradiance distribution (beam shape) is required. The intra- or extra cavity laser beam shaping-LBS methods can be employed to alter the output beam characteristics. A novel design is presented to convert a semi Gaussian beam produced by usual commercial lasers into a high quality flat-top beam. Furthermore, it will be demonstrated that by changing some simple parameters related to characteristics of optical elements (mirrors and beam-splitter with particular dielectric coating) used in this design, we can easily improve the shape of any arbitrary laser beam distribution and its related standard parameters (M2 and k). Considering the significance of laser beams in medical applications especially in surgery and dermatology and to show the validation of this design, the effects of laser beam shapes in treatments of vascular malformation is presented here. Before clinical treatments, the Monte-Carlo method is used to model and simulate the energy deposition in a true skin anatomy for different beam shapes, wavelengths and powers. We have used a 12 watts copper vapor laser (having 511 nm and 578 nm wavelengths) with semi-Gaussian output beam distribution. The results are repeated using a multimode KTP (532 nm) of similar power. Finally, a comparison between the results of laser treatments with and without LBS facilities on patients having Port Wine Stains (malformation of vascular tissues) of various sizes and depths are presented and a significant improvement in treatments of PWS of different sizes using the beam homogenizer are seen.
Sponsorship	IEEE/LEOS Chapter, Ukraine Union Radio-Scietifique Internationale, URSI Comm. "D" IEEE AP/MTT/ED/AES/GRS/NPS/ EMB East Ukraine Joint Chapter European Office of Aerosp. Res. and Dev., AFOSR, AFRL US Army Int. Center - Atlantic, European Res. Office Office of Naval Res. Global
File Size	110058
File Format	PDF
ISBN	0780391306
DOI	10.1109/CAOL.2005.1553802
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-12
Publisher Place	Ukraine
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Biomedical equipment Biomedical optical imaging Shape Optical design Medical treatment Medical services Laser modes Laser beams Mirrors Laser applications
Content Type	Text
Resource Type	Article

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