supported by the National Key R&D Program of China(Nos.2017YFA0303800 and2017YFA0303700);the National Natural Science Foundation of China(Nos.11534006,11774183,and11674184);the Natural Science Foundation of Tianjin(No.16JCZDJC31300);the 111 Project(No.B07013)
In free-space or in optical fibers,orbital angular momentum(OAM)multiplexing for information transmission has been greatly developed.The light sources used were well coherent communication bands,and the fibers used we...
supported by the National"973"Pro-gram of China(No.2010CB327600);the National Natural Science Foundation of China(No.61020106007);the Fundamental Research Funds for the Central University(No.BUPT2011RC0403);the National"863"Program of China(No.2007AA03Z418);the 111 Project of China(No.B07005);the Program for Changjiang Scholars and Innovative Research Team in University MOE,China(No.IRT0609)
A novel long wavelength photodetector with dual-wavelength spectral response is designed and fabricated using a step-shaped Fabry-Perot (F-P) filter structure. The step-shaped GaAs/A1GaAs distributed Bragg reflector...