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
A design of diode-pumped Nd.YAG laser with a single crystal that generates simultaneous laser action at the wavelengths of 1064 nm and 1319 nm was presented and continuous-wave （CW） of 588.9 nm was obtained for the ...A design of diode-pumped Nd.YAG laser with a single crystal that generates simultaneous laser action at the wavelengths of 1064 nm and 1319 nm was presented and continuous-wave （CW） of 588.9 nm was obtained for the first time by use of type-I critical phase-matching LBO crystal intracavity sumfrequency mixing. The maximum output power of 62 mW is achieved with an incident pump power of 1.8 W. The optical-to-optical conversion efficiency is up to 3.4% ,and the power instability in 24 h is better than ± 2.7 %.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.
文摘A design of diode-pumped Nd.YAG laser with a single crystal that generates simultaneous laser action at the wavelengths of 1064 nm and 1319 nm was presented and continuous-wave （CW） of 588.9 nm was obtained for the first time by use of type-I critical phase-matching LBO crystal intracavity sumfrequency mixing. The maximum output power of 62 mW is achieved with an incident pump power of 1.8 W. The optical-to-optical conversion efficiency is up to 3.4% ,and the power instability in 24 h is better than ± 2.7 %.
