新型小尺寸窄带偏振分光器在光纤通信中的应用

发布时间：2018-01-11 10:01

本文关键词：新型小尺寸窄带偏振分光器在光纤通信中的应用　出处：《光谱学与光谱分析》2016年12期 　论文类型：期刊论文

【摘要】：在光纤通信中,为了在不改变调制波长范围的基础上仍能实现更多数据通道的波分复用,设计了一种新型的小尺寸窄带偏振分光器,用于对现有的数据通信网络进行扩容以及提高光信号的信噪比。在该分光器上蒸镀了两种新设计的膜系,一层是窄带滤光膜,另一层是偏振分光膜。采用TFCalc软件仿真,设计结果中窄带滤光膜的带宽约为0.4nm,偏振分光膜在1 530~1 560nm范围内对p光的通透性能优于99.8%。基于以上膜系设计在BK7光学玻璃上实际制备两组膜系,实验采用Agilent 8164-A型光波测量系统对经过膜后的光进行光谱分析。结果显示,窄带滤光膜的实际带宽优于0.4nm,增益平坦度小于-0.05dB,相比现有常见的0.8nm滤光膜具有更窄的带宽,可以实现在调制波长范围不变的条件下增大波分复用的数据通道总量。偏振滤光膜的实际p光透光率为99.6%,相比仿真值略低,但仍优于设计要求,相比传统分光器的光信号强度保留效果更好,具有更高的信噪比。综上所述,该分光器具有更好的应用价值和实用意义。
[Abstract]:In optical fiber communication, in order to realize the wavelength division multiplexing of more data channels without changing the modulation wavelength range, a novel narrow-band polarization splitter is designed. It is used to expand the capacity of the existing data communication network and improve the signal to noise ratio of the optical signal. Two newly designed film systems are evaporated on the splitter, one is a narrow band filter film. The other layer is the polarizing film, which is simulated by TFCalc software. The bandwidth of the narrow band filter film is about 0.4nm. The optical transmittance of the polarizing film is better than that of 99.8nm in the range of 1 530 ~ 1 560 nm. Based on the above design, two groups of films have been fabricated on BK7 optical glass. Agilent 8164-A optical wave measurement system is used to analyze the spectrum of the light passing through the film. The results show that the actual bandwidth of the narrow band filter film is better than 0.4 nm. The gain flatness is less than -0.05dB, which has a narrower bandwidth than the existing 0.8nm filter film. The optical transmittance of polarization filter film is 99.6, which is slightly lower than that of simulation, but still better than the design requirement. Compared with the traditional spectrometer, the optical signal intensity retention effect is better and the signal-to-noise ratio is higher. In conclusion, this splitter has better application value and practical significance.
【作者单位】：长春理工大学;长春理工大学光电信息学院;吉林省交通规划设计院;
【基金】：国家自然科学基金项目(60637010) 吉林省教育厅“十二五”科学技术研究规划项目(吉教科[2014]B060)资助
【分类号】：TN929.11
【正文快照】： 引言光纤通信是利用光纤传递携带信息的光信号的通信技术,属于有线通信技术的一个支脉。光纤通信技术对电信工业具有革命性的影响,在大数据时代中扮演着举足轻重的角色[1]。光纤通信技术具有诸多优势,其中包括通信容量大、频带宽;低损耗,有效传输距离远;具有很好的保密性,抗干

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