基于渐变折射率光量子阱的密集波分复用研究  

Study of Dense Wavelength Division Multiplexing Based on Graded-index Photonic Quantum Well Structure

作　　者：刘靖[1] 孙军强[1] 黄重庆[2] 黄德修[1] 吴铭[1] 陈敏[2] 

机构地区：[1]华中科技大学武汉光电国家实验室,武汉430074 [2]湖南理工学院物电系,湖南岳阳410006

出　　处：《光子学报》2007年第12期2350-2354,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(60577006;50774034);湖南省教育厅科研计划(06JJ2005;05A055)资助

摘　　要：提出了利用渐变折射率光量子阱设计密集波分复用器件的构想,用时域有限差分法验证了该构想的可行性,分析了这种器件工作的物理机理.计算表明,折射率分布曲线不同的光子阱能局域不同的量子态,应用不同局域态的光量子阱对光波进行合成和分离,能够有效减小信道间隔,实现密集波分复用功能,使有限的频带能容纳更多的信道,提高频谱利用率.该器件信道中心波长精确稳定,信道隔离度较大,插入损耗小而均匀,信道间信号串扰小.A novel optical DWDM, which is made of photonic quantum well structures by employing gradedindex photonic crystals,is proposed. Numerical investigations show that this kind of structure is feasible by using the finite-difference time-domain method, and its operation mechanism is presented. It is found that different photonic quantum well structures with different refractive index distribution graphs can locate different quantum states,as applying to synthesizing or separating wavelength, and the channel interval can be effectively reduced. The function of Wavelength Division Multiplexing can be realized, more channels can be accommodated in limited frequency range,and the spectrum utilization ratio can be greatly improved. The testing results indicate that the DWDM device has accurate central wavelength,large channel isolation characteristics, small and even channel inserting loss,lower crosstalk etc.

关 键 词：密集波分复用 光量子阱 渐变折射率 光子晶体 

分 类 号：TN929.11[电子电信—通信与信息系统]