The configuration of the novel three-stage L-band erbium-doped fiber amplifier with very large and flat gain and very low noise figure presented in this paper uses the forward ASE (amplified spontaneous emission) from...The configuration of the novel three-stage L-band erbium-doped fiber amplifier with very large and flat gain and very low noise figure presented in this paper uses the forward ASE (amplified spontaneous emission) from the first section of the EDF (erbium-doped fiber) and the backward ASE from the third section of the EDF (both serve as the secondary pump sources of energy) to pump the second EDF. To improve the pump efficiency, the power of the pump is split into two parts (with a ratio of e.g. 2:7). The characteristics of this L-band EDFA are studied on the basis of the Giles Model with ASE.展开更多
Digital image difference method monitorring coating status of microsphere targets automatically is suggested.A CCD micro-imaging system is developed for monitoring the status of bouncing and adherence between microsph...Digital image difference method monitorring coating status of microsphere targets automatically is suggested.A CCD micro-imaging system is developed for monitoring the status of bouncing and adherence between microspheres and the bouncing pan.A new bouncing pan with multiple holes is adopted for microsphere coating to enhance the microsphere coating efficiency.展开更多
文摘The configuration of the novel three-stage L-band erbium-doped fiber amplifier with very large and flat gain and very low noise figure presented in this paper uses the forward ASE (amplified spontaneous emission) from the first section of the EDF (erbium-doped fiber) and the backward ASE from the third section of the EDF (both serve as the secondary pump sources of energy) to pump the second EDF. To improve the pump efficiency, the power of the pump is split into two parts (with a ratio of e.g. 2:7). The characteristics of this L-band EDFA are studied on the basis of the Giles Model with ASE.
文摘Digital image difference method monitorring coating status of microsphere targets automatically is suggested.A CCD micro-imaging system is developed for monitoring the status of bouncing and adherence between microspheres and the bouncing pan.A new bouncing pan with multiple holes is adopted for microsphere coating to enhance the microsphere coating efficiency.
