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In struggle for record average and peak power of laser radiation it was found out that many characteristics before used materials don't answer increasing inquiries. There was a problem of searching new alternative materials. One of such materials can be a ceramic. For lasers with high average and peak power a polycrystalline ceramics offers well-known advantages: large aperture like in glass, high...
We present an experimental study of the physical process that leads to spatially incoherent, nonmodal emission in broad-area vertical-cavity surface-emitting lasers. We show that this special emission regime that occurs in pulsed operation of these lasers is due to a combination of a spatially distributed thermal or refractive index gradient (thermal lens) and thermal expansion of the cavity during...
Summary form only given. Nd:YVO/sub 4/ is a commonly used four-level laser gain material in microchip lasers with a positive change in refractive index with temperature and short absorption depth, producing a positive 'thermal' lens within the bulk of the crystal, as well as surface deformation when pumped cw with a laser diode. We have developed an analytical computer model based on the work of Farrukh...
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