Homoelle D, Wielandy S, Gaeta A L, Borrelli N F, Smith C
Opt Lett. 1999 Sep 15;24(18):1311-3. doi: 10.1364/ol.24.001311.
We investigate the use of infrared femtosecond laser pulses to induce highly localized refractive-index changes in fused-silica glasses. We characterize the magnitude of the change as a function of exposure and measure index changes as large as 3x10(-3) and 5x10(-3) in pure fused silica and boron-doped silica, respectively. The potential of this technique for writing three-dimensional photonic structures in bulk glasses is demonstrated by the fabrication of a Y coupler within a sample of pure fused silica.
我们研究了使用红外飞秒激光脉冲在熔融石英玻璃中诱导高度局部化的折射率变化。我们将变化的幅度表征为曝光量的函数，并分别测量了纯熔融石英和掺硼石英中高达3×10⁻³和5×10⁻³的折射率变化。通过在纯熔融石英样品中制造一个Y型耦合器，证明了该技术在块状玻璃中写入三维光子结构的潜力。
