1250～1370nm波带PbSe量子点宽带光纤放大器  

Broadband Pb Se Quantum-Dot-Doped Fiber Amplifiers from 1250 nm to 1370 nm

作　　者：程成[1] 胡能树 

机构地区：[1]浙江工业大学光电子智能化技术研究所,浙江杭州310023

出　　处：《光学学报》2016年第4期65-72,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61274124;61474100)

摘　　要：实现了一种硒化铅（Pb Se）量子点掺杂的光纤放大器（QDFA）。以直径为4 cm的Pb Se量子点作为光纤增益介质,由量子点掺杂光纤、980 nm单模激光器、波分复用器、隔离器等组成全光传输结构,在1250~1370 nm的宽带区间实现了信号光的放大。实验表明：对于纤芯直径为50μm的多模量子点掺杂光纤,激励阈值为62 m W,-3 d B宽带达120 nm,-1 d B平坦带宽为90 nm,增益可达12 d B。与传统的掺铒光纤放大器相比,QDFA的带宽更宽,增益更平坦,噪声也较低。该QDFA为解决目前密集型光波复用（DWDM）系统对光纤通信放大器日益增长的带宽需求提供了一种新的途径。A Pb Se quantum-dot-doped fiber amplifier（QDFA） is realized. Using Pb Se quantum dots as the gain media doped in the fiber, the broadband signal light ranging from 1250 nm to 1370 nm is amplified in an all-optical framework,which consists of the quantum- dot- doped fiber, 980 nm pumping laser, wavelength division multiplexing, and isolator. For the diameter of 50 mm quantum-dot-doped fiber, there is evidence to show that the excitation threshold is 62 m W, the bandwidth is 120 nm at-3 d B, the flattened bandwidth is 90 nm at-1 d B, and the signal gain is up to 12 d B. The wide bandwidth, flattened gain, and low noise of QDFA are advantageous over the traditional erbium doped fiber amplifiers. The QDFA presented in this paper provides a new solving way of the growing demand for the bandwidth of fiber amplifiers in the current dense wavelength division multiplexing（DWDM）system.

关 键 词：光纤光学 硒化铅量子点 量子点掺杂光纤 增益带宽 激励阈值 噪声系数 

分 类 号：TN253[电子电信—物理电子学]