基于隧道结级联多发光区机制的近可见光波段超宽带超辐射发光二极管器件研究

To improve the accuracy of Interferometric Fiber Optic Gyro (IFOG) for aeronautic and astronautic application, superluminescent diode (SLD) with super-wide spectrum in the the near-visible regime is proposed in this programm. An emission with a spectral width of 100nm and a power of more 30mW is expected. The conventional SLD in the near-visible regime demonstrated narrow spectral width due to the optical self-absorption, and suffered from low coupling efficiency between the waveguide layer and the active region. To solve these problems, an innovative SLD structure with multi-active region was proposed in this programm.Considering the optical absorption and optical field distribution, the optical self-abrorption could be solved, and an emission with super-wide spectral width could be realized.In addition to this, the tunel-junction structure is employed between different active regions to improve the carrier injection efficiency. SLD structure with surface plasma waveguide is also proposed to improve the coupling efficiency between the waveguide layer and the active region, thus high output power of SLD can be gained.These innovative methods will improve the performance of SLD and increase the accuracy of Interferometric Fiber Optic Gyro.

为提高航空、航天等应用中光纤陀螺仪的精度，本项目提出研制超宽光谱近可见光波段的超辐射发光二极管器件，器件预期出光功率>30mW，光谱半宽>100nm。针对现阶段近可见光波段的常规SLD器件内部大的光学自吸收引起的现有器件结构光谱半宽受限，以及波导与发光区耦合效率低下等问题，我们提出新型的多发光区SLD器件结构，综合考虑发光区自吸收及内部光场分布情况，解决发光区自吸收问题，提高SLD器件光谱半宽；同时在各发光区之间引入隧道结结构提高载流子电子和空穴的注入效率；并计划采用表面等离子体波导结构提高发光区与波导层耦合效率，获取高功率高效率的近可见光超宽带辐射SLD器件，为近可见光超辐射发光器件在光纤陀螺仪等方面的应用奠定基础。

为满足高精度光纤陀螺仪对近可见光波段超宽光谱辐射发光二极管(SLD)的迫切应用需求，本项目研制了超宽光谱近可见光波段的超辐射发光二极管器件，器件出光功率>50mW，光谱半宽>100nm。项目执行过程中发表论文15篇，申请专利9项，培养已毕业或在读博士研究生7人。针对现阶段近可见光波段的常规SLD器件内部大的光学自吸收引起的现有器件结构光谱半宽受限，以及波导与发光区耦合效率低下等问题，我们提出新型的多发光区SLD器件结构，综合考虑发光区自吸收及内部光场分布情况，解决发光区自吸收问题，提高SLD器件光谱半宽；同时在各发光区之间引入隧道结结构提高载流子电子和空穴的注入效率；并采用表面等离子体波导结构提高发光区与波导层耦合效率，获取高功率高效率的近可见光超宽带辐射SLD器件，为近可见光超辐射发光器件在光纤陀螺仪等方面的应用奠定基础。