反常色散亚微米硫系玻璃脊形波导及其在光学相位共轭中的应用  

Sub-micron Chalcogenide Glass Ridge Waveguides with Anomalous Dispersion and Its Application to Optical Phase Conjugation

作　　者：邹林儿[1] 姚松超[1] 陈抱雪[2] 矶守[3] 

机构地区：[1]南昌大学物理系,南昌330031 [2]上海理工大学光电信息与计算机工程学院,上海200093 [3]日本东京农工大学工学院应用化学系

出　　处：《光子学报》2015年第3期47-52,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61465008;60967003;61077042)资助

摘　　要：基于有限元法仿真计算了脊高850nm、脊宽800～2 000nm、刻蚀深度200～600nm的亚微米结构尺寸As2S3硫系玻璃脊形波导的有效折射率和色散特性.结果显示在光通信波段内准TM模式下一定波导结构存在反常色散,且同一脊宽和脊高下零色散波长位置随刻蚀深度增加出现蓝移;同时合适结构的波导还存在两个零色散波长,如脊高850nm、脊宽1 000nm、刻蚀深度350nm的脊形波导,准TM模式下两个零色散波长为1 510nm和1 746nm,波长1 550nm处的色散值为-28.62ps2·km-1.在此基础上,利用此具有反常色散的脊形波导作为光学相位共轭介质,将其应用在220km远距离光纤链路的3×40Gb/s高比特率波分复用系统中进行仿真实验,结果显示该硫系玻璃脊形波导构建的光学相位共轭器有效地实现了四波混频效应,且对整个系统的色散进行了有效补偿.The finite element method was employed to analyze the effective refractive index and the dispersion characteristics for sub-micron As2 S3 chalcogenide glass ridge waveguides with ridge height of 850 nm, ridge width of 800-2 000 nm, and etch depth of 200-600 nm. The results show that some certain structure ridge waveguides have anomalous dispersion for the quasi-TM mode within optical communications band, and their zero dispersion wavelengths take place the blue shift with the increasing of etch depth in the same ridge width and ridge height. Moreover, there are two zero dispersion wavelengths in these waveguides with an appropriate structure, the As2 $3 waveguide with ridge height of 850 nm, ridge width of 1 000 nm,and etch depth of 350 nm presents two the zero-dispersion wavelengths of 1 510 nm and 1 746 nm, and the dispersion value of --28.62 ps2 ·km-1 in the quasi-TM mode at 1 550 nm. On this basis, the As2S3 chalcogenide glass ridge waveguide with anomalous dispersion was used as an optical phase conjugation medium, and then applied in 220 km long distance fibre link with 3 ×40 Gb/s high bit-rate wavelength division multiplexing system by the experimental simulation. The results show this optical phase conjugator based on the chalcogenide glass ridge waveguide achieves availably the four- wave mixing effect and offers effectively the dispersion compensation for ＊he whole system.

关 键 词：集成光学 光学相位共轭 脊形波导 色散 硫系玻璃 

分 类 号：TN252[电子电信—物理电子学] O437[机械工程—光学工程]