Laser diodes
About the physical meaning of the critical temperature for catastrophic optical damage in high power quantum well laser diodes
... power laser diodes is launched when a critical local temperature (Tc) is reached; temperatures ranging from 120ºC to 200ºC were experimentally ...the laser structure, calculated using finite element ...
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About the critical temperature for catastrophic optical damage in high power laser diodes
... from laser diodes, reliability remains to be a strong challenge for the use of these devices in many ...power laser diodes is critical to improve their power and ...the laser ...
5
Thermomechanical degradation of single and multiple quantum well AlGaAs/GaAs laser diodes
... of laser diodes with active zones comprising either single (SQW) or multiple quantum wells (MQW) has been analysed via finite element ...diode laser structure and the relevant size effects associated ...
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Mechanisms driving the catastrophic optical damage in high power laser diodes
... the laser active zone, and why the critical temperature constitutes a turning point for the optical absorption of the laser ...the laser field as it propagates along the waveguide, for both broad and ...
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Nanoscale effects on the thermal and mechanical properties of AlGaAs/GaAs quantum well laser diodes: influence on the catastrophic optical damage
... (QW) laser diodes based on ...these laser diodes run in continuous wave (cw) mode with high internal optical power densities, the QW and guide layers can experiment very intense local heating ...
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Catastrophic optical damage of high power InGaAs/AlGaAs laser diodes
... power laser diodes must be understood in order to increase their power and lifetime ...the laser damage have to be identified, and models that allow to the set-up of a degradation scenario related to ...
8
Development of IR frequency standards based on laser diodes
... La invención de los peines de frecuencia ópticos auto‐referenciados [1,2] ha marcado un punto de inflexión en la medida de las frecuencias ópticas. Un peine de frecuencias ópticas auto‐ referenciado (en adelante ...
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Carrier Dynamics and microwave characteristics of GaAs-Based Quantum-Well Lasers
... the laser equivalent circuit, and the modulation response of strained InGaAs–GaAs lasers on the values of these time ...the laser equivalent ...high-speed laser diodes fabricated using ...
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EFEITO TERAPÊUTICO DA LASERTERAPIA EM PONTOS DE ACUPUNTURA NA DOR NEUROPÁTICA
... com laser de baixa potência, foi utilizado o laser de baixa potência de Arsenieto de Gálio- alumínio GaAlAs (Laserpulse, Imbramed) com comprimento de onda 904 nm, modo pulsátil, potência 70W, densidade de ...
5
Towards Development of Laser Scribed Graphene Transducers for Electrochemical Biosensors
... Transducers formed by rGOx samples showed a quasi- reversible electrochemical system, which was improved by the higher cycles of laser treatments [5]. The tendency was supported by ΔEp measurement of 589 mV, 164 ...
5
Aplicaciones del Laser Holmiun en Urología
... En el segundo caso, presentamos a un paciente masculino de 60 años, con antecedente de cáncer de próstata intervenido con prostatectomía radical ocho meses atrás, quien presentó desde el mes posterior a la cirugía ...
8
Oceanic laser-induced breakdown spectroscopy. Development and application for the analysis of submerged solids
... of laser-based techniques ...two laser sources, the precise alignment needed and synchronization in data acquisition are obstacles for its implementation in field analysis [15, ...
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Thermal and mechanical issues of high-power laser diode degradation
... the laser slowly deteriorate due to a progressive accumulation of point defects, as well as to other effects such as thermal lensing [20] or current-crowding ...the laser field in the vicinity of the ...
18
Laser Doppler flowmeter e o diagnóstico pulpar
... O ponto médio do nível do fluxo sanguíneo em dentes saudáveis é mais alto do que aqueles que não têm vitalidade. Não obstante em dentes vitais com o aporte sanguíneo diminuído, o nível do fluxo pode ser menor e a ...
5
Usos y aplicaciones del laser holmium en endourologa
... En el segundo caso, presentamos a un paciente masculino de la octava década de la vida, con antece- dente de hiperplasia prostática obstructiva (HPO), trata- do mediante resección transuretral de próstata (RTUP), con ...
7
Combined therapy in diabetic macular edema
... macular laser monotherapy. The group with the laser did not obtain a significant improvement on BCVA, but although the BCVA improvement in the BVZ group was significant during the first 6 months, there was ...
5
Myopic Laser-Assisted Subepithelial Keratectomy (LASEK) outcomes using three different excimer laser platforms: A retrospective observational study
... Both laser in situ keratomileusis (LASIK) and surface ab- lation (SA) have been proven to be safe, effective and predictable procedures, becoming the gold standard for myopia correction [1 – ...excimer ...
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SISTEMA DE COMUNICACION CON TECNOLOGIA LASER
... transmisor-receptor laser permite que dos computadoras con capacidad de comunicación en serie (RS-232) para comunicar a más de 4 Km con un rayo láser dependiendo la distancia que puede alcanzar el láser a su ...
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TítuloThermomechanical and metallurgical modelling of laser hardening and laser cladding processes
... the laser power to the surface of the elements below, forming the ...the laser welding of aluminium alloys, using ABAQUS and a conical Gaussian heat source, were developed by Spina et ...the laser ...
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VIBROMETRO LASER
... The system is made up by three stages: optical, electronical and signal processing. The optical stage is made up by a laser beam, a beam splitter, a reference mirror and measure mirror, the last one is placed on ...
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