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飞秒激光光刻是一种灵活的三维光子器件制作方法。由于铽镓石榴石具有法拉第效应,具有广泛的应用,利用中心波长为800nm,重复频率为1kHz的飞秒激光,在磁致旋光晶体铽镓石榴石中刻写了双线型和压低圆包层两种光波导,重构了激光诱导折射率改变的分布和测试了光波导的传输损耗。双线型波导具有偏振依赖的导光特性,圆包层波导则不存在偏振依赖的导光特性。对于双线型波导,横电(TE)模和横磁(TM)模相位完全失配,在外加磁场下,导模的偏振面不会发生旋转,光刻的圆包层波导的导模的偏振面能够发生磁致旋转。铽镓石榴石中的双线型和圆包层波导可以作为波导偏振器和磁旋光器件,在集成光学上有潜在的应用价值。
Femtosecond laser lithography is a flexible method of making 3D photonic devices. Since terbium gallium garnet has a Faraday effect, it has a wide range of applications. By using a femtosecond laser with a center wavelength of 800 nm and a repetition frequency of 1 kHz, bismuth garnet is written in a birefringent-type gallium arsenide The optical waveguides reconstruct the distribution of the laser-induced refractive index changes and test the transmission loss of the optical waveguides. The birefringent waveguides have polarization-dependent light guiding characteristics and the circular clad waveguide does not have the polarization-dependent light guiding characteristics. For a bifilar waveguide, the phase of the transverse (TE) and transverse (TM) modes is completely mismatched and the plane of polarization of the guided mode will not rotate under the applied magnetic field. The guided-mode The polarization plane can magnetically rotate. The bilinear and circular clad waveguides in terbium gallium garnet can be used as waveguide polarizers and magnetic polarize devices, which have potential applications in integrated optics.