Study of the evanescent wave coupled semiconductor quantum dot amplifying fiber
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Abstract:
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.
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Clc Number:
TN253
