利用0.45节距的单根GR IN-Lens与微电机械(M icro E lectron ic M echan ical System,MEMS)挡光片相结合研制出一种连续可调光衰减器,由于采用单根的GR IN-Lens透镜作为耦合部件使得器件整体结构紧凑,在设计上由于MEMS遮挡片置于单模光...利用0.45节距的单根GR IN-Lens与微电机械(M icro E lectron ic M echan ical System,MEMS)挡光片相结合研制出一种连续可调光衰减器,由于采用单根的GR IN-Lens透镜作为耦合部件使得器件整体结构紧凑,在设计上由于MEMS遮挡片置于单模光纤与GR IN-Lens之间的空隙处使得所需遮挡的光斑尺寸大大减小从而降低了对MEMS遮挡片伸缩量的要求。经对所试制的样品进行测试,结果表明,衰减器光学性能良好,插损(insertion loss,IL)、回损(return loss,RL)、动态范围(dynam ic range)等指标达到了预计的结果。展开更多
The beams of 980nm high-power LDs are analyzed, and the reasons that aspect ratio of LD beams is high are explained. It is certified by the test that cylindrical lens can efficiently compress the perpendicular diver...The beams of 980nm high-power LDs are analyzed, and the reasons that aspect ratio of LD beams is high are explained. It is certified by the test that cylindrical lens can efficiently compress the perpendicular divergence angle of the beam. Some typical and popular lensed fibers were compared and analyzed according to coupling characteristics. The factors which affect the coupling efficiency and tolerance of the wedged-shaped GRIN tipped lensed fiber are pointed out, and some methods to reduce the coupling loss of the lensed fibers are proposed finally.展开更多
文摘利用0.45节距的单根GR IN-Lens与微电机械(M icro E lectron ic M echan ical System,MEMS)挡光片相结合研制出一种连续可调光衰减器,由于采用单根的GR IN-Lens透镜作为耦合部件使得器件整体结构紧凑,在设计上由于MEMS遮挡片置于单模光纤与GR IN-Lens之间的空隙处使得所需遮挡的光斑尺寸大大减小从而降低了对MEMS遮挡片伸缩量的要求。经对所试制的样品进行测试,结果表明,衰减器光学性能良好,插损(insertion loss,IL)、回损(return loss,RL)、动态范围(dynam ic range)等指标达到了预计的结果。
文摘The beams of 980nm high-power LDs are analyzed, and the reasons that aspect ratio of LD beams is high are explained. It is certified by the test that cylindrical lens can efficiently compress the perpendicular divergence angle of the beam. Some typical and popular lensed fibers were compared and analyzed according to coupling characteristics. The factors which affect the coupling efficiency and tolerance of the wedged-shaped GRIN tipped lensed fiber are pointed out, and some methods to reduce the coupling loss of the lensed fibers are proposed finally.
