Buried waveguide in neodymium-doped phosphate glass obtained by femtosecond laser writing using a double line approach

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（10）
• 页码范围: 71-74
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.102301

摘要

We fabricate a buried channel waveguide in neodymium-doped phosphate glass using a double line approach by femtosecond laser writing.Raman spectra reveal an expansion of the glass network in the laser irradiated region.Given the stress-induced positive refractive index change,waveguiding between two separated tracks is demonstrated.The refractive index difference profile of the waveguide is reconstructed from the measured near-field mode.Propagation loss is measured by scattering technique.Microluminescence spectra reveal that the Nd3+ fluorescence property is not significantly affected by waveguide formation process,which indicates that the inscribed waveguide is a good candidate for active device.