Diode-pumped passively Q-switched picosecond microchip lasers

Zayhowski, J. J.; Dill, C.

doi:10.1364/ol.19.001427

Cited by 408 publications

(129 citation statements)

References 4 publications

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“…55,58 Alternative approaches are the use of a single material acting as active medium and saturable absorber, 59 the growth of one material on another, 60 and the use of semiconductor saturable absorbers. 61 These devices are pumped by a diode laser (excitation source) and the increase of the pumping power changes the pulse repetition rate, leaving the other pulse parameters unchanged, such as the pulse energy and the pulse duration, which are extremely stable.…”

Section: +mentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

342

195

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Esta revisão descreve os aspectos fundamentais, a instrumentação, as aplicações e tendências futuras de uma técnica analítica que se encontra em seu estágio de consolidação e que está em vias de estabelecer o seu nicho entre as técnicas espectrofotométricas modernas. A técnica é denominada Espectroscopia de Emissão em Plasma Induzido por Laser (em inglês, Laser Induced Breakdown Spectroscopy, LIBS) e sua principal característica está no uso de pulsos de laser como fonte de energia para vaporizar a amostra e excitar a emissão de radiação eletromagnética, a partir de seus elementos e/ou fragmentos moleculares. A radiação emitida é analisada por meio de instrumentos ópticos de alta resolução e as suas intensidades são medidas, usualmente com detectores rápidos de estado sólido. Em conjunto, esses dispositivos permitem a geração e a medida de um espectro de emissão de faixa ampla do fenômeno induzido pelo pulso de laser. O espectro registrado contém informação qualitativa e quantitativa que pode ser correlacionada com a identidade da amostra ou empregada na determinação da quantidade de seus constituintes. Essa revisão é dividida em quatro partes. A primeira aborda aspectos históricos da técnica e os conceitos teóricos relevantes associados com LIBS; então, os aspectos práticos de diversas abordagens experimentais e instrumentais empregadas na implementação da técnica são revistos de forma crítica; as aplicações encontradas na literatura, incluindo aquelas que empregam quimiometria, são classificadas e exemplificadas por meio de trabalhos relevantes recentemente publicados. Finalmente, uma tentativa de estabelecer uma avaliação global e as perspectivas futuras para a técnica é apresentada.This review describes the fundamentals, instrumentation, applications and future trends of an analytical technique that is in its early stages of consolidation and is establishing its definitive niches among modern spectrometric techniques. The technique has been named Laser Induced Breakdown Spectroscopy (LIBS) and its main characteristic stands in the use of short laser pulses as the energy source to vaporize samples and excite the emission of electromagnetic radiation from its elements and/or molecular fragments. The emitted radiation is analyzed by high resolution optics and the intensities are recorded, usually by fast triggered solid state detectors. Together, these devices allow producing and registering a wide ranging emission spectrum of the short-lived phenomenon induced by the laser pulse. The spectrum contains qualitative and quantitative information which can be correlated with sample identity or can be used to determine the amount of its constituents. This review is divided in four parts. First, the relevant historical and theoretical concepts associated with LIBS are presented; then the main practical aspects of the several experimental and instrumental approaches employed for implementation of the technique are critically described; the applications related in the literature, including those making use of chemometri...

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Section: +mentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

342

195

View full text Add to dashboard Cite

show abstract

“…It has a simple structure, only two functional optical elements and no external power for optical switching is necessary hence the dimension of the laser head can be reduced. In addition, a short pulse operation less than 1ns is easily obtained by reduction of the cavity length less than 10mm and the beam quality is also good due to the soft aperture effect of a Cr:YAG saturable absorber (Zaykowski & Dill III, 1994;Sakai, 2008). The fiber delivered pump system allows not only further size reduction but also reliable laser operation, because the pump LD which is very sensitive to environmental temperature can be positioned at relatively stable place inside a car apart from the hot engine.…”

Section: Characteristics Of Passively Q-switched Lasermentioning

confidence: 99%

Micro-Solid-State Laser for Ignition of Automobile Engines

Tsunekane¹,

Inohara²,

Kanehara³

et al. 2010

Advances in Solid State Lasers Development and Applications

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“…The shortest Q-switched laser pulses have been generated from microchip lasers; miniature devices that simply consist of a slab of solid-state gain material, nominally less than 2 mm thick, often with the plane-parallel resonator end mirrors coated directly onto its end faces [4][5][6][7][8]. This resonator design lends itself extremely well to existing wafer-like bulk manufacture methods, enabling tens, or even hundreds, of identical devices to be created from a single crystal of gain material.…”

Section: Introductionmentioning

confidence: 99%

“…This resonator design lends itself extremely well to existing wafer-like bulk manufacture methods, enabling tens, or even hundreds, of identical devices to be created from a single crystal of gain material. The resulting laser is then typically end-pumped by a laser diode source, and passively Q-switched using crystalline [7,[9][10][11], or semiconductor [1,3,[12][13][14][15][16], saturable elements. Of these two Q-switching approaches, semiconductor saturable absorber mirrors (SESAMs) have achieved the shortest pulses by virtue of adding negligible length to the laser resonator, with generated pulses as short as 37 ps from a 185 lm resonator [1].…”

Section: Introductionmentioning

confidence: 99%

Scaling Q-switched microchip lasers for shortest pulses

2012

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We evaluate the design of Q-switched microchip lasers to examine the limit of their scaling to shorter picosecond pulses. A numerical model based on the laser rate equations is developed and used to predict the output characteristics of prospective laser designs. Based on the modeled results, we employ a SESAM as a passive Q-switch and thin crystals of Nd:YVO 4 as a gain medium to experimentally demonstrate the production of pulses as short as 22 ps.

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Diode-pumped passively Q-switched picosecond microchip lasers

Cited by 408 publications

References 4 publications

Laser Induced Breakdown Spectroscopy

Laser Induced Breakdown Spectroscopy

Micro-Solid-State Laser for Ignition of Automobile Engines

Scaling Q-switched microchip lasers for shortest pulses

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