首页>
外国专利>
SYSTEM AND METHOD FOR PERMANENTLY WRITING A DIFFRACTION GRATING IN A LOW PHONON ENERGY GLASS MEDIUM
SYSTEM AND METHOD FOR PERMANENTLY WRITING A DIFFRACTION GRATING IN A LOW PHONON ENERGY GLASS MEDIUM
展开▼
机译:在低声能玻璃中永久写入衍射光栅的系统和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A system and method for permanently writing diffraction gratings in low phonon energy glass waveguides are shown. Ultrashort light pulses are generated and made to form two beams synchronously superimposed in the waveguide, therefore forming an interference pattern corresponding to the desired grating. The light pulses are focussed so that the light intensity in the waveguide exceeds a filamentation threshold. The exposure of the waveguide to these light pulses is controlled temporally and spatially in order to limit detrimental thermal effects induced by the high-intensity pulses in the glass medium of the waveguide.
展开▼