Low the system and the method permanently of writing the diffraction grating to phonon energy glass medium

摘要

Low the system and the method of writing the diffraction grating permanently inside the phonon energy glass guided wave road are shown. It generates ultrashort optical pulse, same period does inside the guided wave road and piles up and it forms two beams which are brought together, it forms the interference pattern which corresponds to the lattice of desire with that. In order for optical strength inside the guided wave road to exceed filler men t Shaun threshold, it makes optical pulse focus. Exposure of the guided wave road to these optical pulses, in order to restrict the harmful thermal effect which is induced by high brightness pulse, is controlled timewise and spatially inside glass medium of the guided wave road. Selective figure Figure 1