Based on the character of semiconductors and the structure of optical fiber coupler, a new amplifying fiber, coupled semiconductor quantum dot amplifying fiber (CSQDAF), has been presented. A simplified model of PbS q...Based on the character of semiconductors and the structure of optical fiber coupler, a new amplifying fiber, coupled semiconductor quantum dot amplifying fiber (CSQDAF), has been presented. A simplified model of PbS quantum dot amplifying fiber is built on the energy band structure of semiconductor quantum dots, and a simple expression deduced from the two-level rate equations and light propagation equations is shown in this paper, by which the gain of quantum dot amplifying fiber can be calculated. A gain of approximately 4.5 dB has been measured in this coupled semiconductor quantum dot amplifying fiber at a wavelength of 1310 nm, when the fiber is pumped by a laser operating at a wavelength of 980 nm with power of 30 mW.展开更多
基金the National Natural Science Foundation of China (No. 60477032, 60544002) and Shanghai Key SubjectProject (T0102)
文摘Based on the character of semiconductors and the structure of optical fiber coupler, a new amplifying fiber, coupled semiconductor quantum dot amplifying fiber (CSQDAF), has been presented. A simplified model of PbS quantum dot amplifying fiber is built on the energy band structure of semiconductor quantum dots, and a simple expression deduced from the two-level rate equations and light propagation equations is shown in this paper, by which the gain of quantum dot amplifying fiber can be calculated. A gain of approximately 4.5 dB has been measured in this coupled semiconductor quantum dot amplifying fiber at a wavelength of 1310 nm, when the fiber is pumped by a laser operating at a wavelength of 980 nm with power of 30 mW.
