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首页> 外文会议>Conference on Photon Processing in Microelectronics and Photonics III; 20040126-20040129; San Jose,CA; US >Laser-induced modification of the optical properties of transparent materials
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Laser-induced modification of the optical properties of transparent materials

机译：激光诱导的透明材料光学特性的改变

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摘要

A new field in laser processing is opened by a laser-induced modification of the optical properties, i.e. the refractive index, absorption- and scattering-coefficient, inside transparent materials, preferentially optical glasses. Ultra short laser pulses are capable of inducing these modifications without cracking or even melting the glass matrix. The femtosecond and in some cases even picosecond laser technology allows to control and modify the optical properties in the bulk on a sub-μm scale. This is referred to as nik-engineering~(™), relating the experimental technique to changes of the complex refractive index (n + ik). Three dimensional patterns of the (n + ik) modifications can be achieved in the subsurface region on a microscopic scale. The technical potential for optical applications is challenging and on the verge to be exploited. New results on nik-engineering using ultra-short laser pulses at a wavelength of 800 nm was investigated for special glasses with semi-conductive nano-particles, i.e. photo-chromic and GG/RG filter glasses. This paper discusses the laser-induced optical modification inside these glasses for different laser fluence and shot numbers, addressing also the possible technological relevance of these effects in respect to decorative work, micro-tagging, and other functional structures.
机译：通过激光诱导的光学特性，即透明材料（最好是光学玻璃）内部的折射率，吸收系数和散射系数的改变，开启了激光加工的新领域。超短激光脉冲能够引起这些修饰而不会破裂甚至熔化玻璃基体。飞秒（在某些情况下甚至是皮秒）激光技术还可以控制和修改亚微米级体积内的光学特性。这被称为nik-engineering（TM），将实验技术与复折射率（n + ik）的变化相关联。 （n + ik）修饰的三维图案可以在微观区域的地下区域获得。光学应用的技术潜力具有挑战性，即将被开发。对于具有半导体纳米粒子的特殊玻璃，即光致变色和GG / RG滤光玻璃，研究了使用波长为800 nm的超短激光脉冲进行nik工程的新结果。本文讨论了这些眼镜内部针对不同的激光注量和发射次数的激光诱导的光学修饰，并探讨了这些效果在装饰工作，微标签和其他功能结构方面的可能技术意义。

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