玻璃基离子交换型宽带2×23 dB 耦合器研究

摘要

In order to meet the demand of fabrication and application of 2 ×N optical power splitters , theoretical and experimental researches were carried out for broadband integrated 2 ×2 3dB couplers.The traditional asymmetric X-junction was improved by using three-dimension beam propagation method , through simulation and design , 2 ×2 3dB couplers with low loss and wide operating bandwidth were obtained .Considering characteristics of asymmetric X-junction, the broadband 2 ×2 3dB coupler was successfully made by using Ag +-Na+ion-exchange in glass .The measurement of light spectrum, using two broadband light source with wavelength respectively in 1260nm ~1360nm and 1460nm ~1600nm, showed that the insertion loss was less than 4.0dB in the broadband range , wavelength response was relatively flat and wavelength insensitive , uniformity was less than 0.5dB.The results prove that , using the improved asymmetric X-junction combined with ion-exchange technique , broadband 2 ×2 3dB couplers with good performance can be fabricated in glass , which lays good foundation for further optimization of the device performance and successful development of its valuable application .%　　为满足2×N光功率分配器的制作和应用的需求，对宽带集成化2×23dB耦合器进行了深入的理论和实验研究。采用3-D光束传播法，对传统的非对称X结进行了模拟改进，设计了低损耗且具有较宽工作带宽的2×23dB耦合器。采用Ag＋-Na＋离子交换技术在玻璃基上成功制作了非对称X结结构的宽带2×23dB耦合器。通过对1260nm～1360nm和1460nm～1600nm两个波段宽带光源的光谱测试，得到在宽带范围内小于4.0dB的插入损耗，光谱谱线相对平坦，波长依赖性较小，均匀性小于0.5 dB。结果表明，采用这种非对称X结并结合离子交换工艺，可以在玻璃基上制作出宽带的2×23 dB耦合器，这为进一步优化器件性能，研制成功具有应用价值的器件奠定了基础。