Author Affiliations
Abstract
1 Shandong Institute of Spacecraft Electrical Technology, Yantai 264670, China
2 Laser Fusion Research Center, China Academic of Engineering Physics, Mianyang 621900, China
In this Letter, temporal self-modifying behavior of amplitude modulation pulse propagation characteristics in multiphoton absorbers is presented by solving the underlying theoretical model coupling the propagation equation with the rate equations. The characteristics of the output temporal shapes are of primary concern and are discussed in detail. Amplitude modulation suppressing effects of multiphoton absorbers are numerically demonstrated; they have not been reported previously, to our knowledge. By taking a time resolved absorption coefficients, the corresponding physical mechanism is explicitly interpreted.
190.4710 Optical nonlinearities in organic materials 140.3300 Laser beam shaping Chinese Optics Letters
2015, 13(7): 070009
1 中央民族大学 物理与电子工程学院，北京 100081
2 河北建筑工程学院 计算机系，河北 张家口 075024
3 中国人民解放军63713部队，山西 036301
介绍了全光纤熔融拉锥型3 dB宽带耦合器的理论设计，根据理论设计制作了样品。应用耦合模理论分析了全光纤非对称熔融拉锥型耦合器的宽带特性；提出了3 dB宽带耦合器的制作方案，在此基础上制作了样品；对样品进行测试，样品带宽大约为300 nm(在1300 nm～1600 nm波长之间)，附加损耗小于0．5 dB，完全达到了实用化的要求。
无源器件 宽带耦合器 熔融拉锥 耦合模理论 passive device wide band coupler fused biconical taper theory of coupled-mode
