【作者】 史磊；

【导师】 胡鸿璋； 向望华；

【作者基本信息】 天津大学 ， 物理电子学， 2003， 硕士

【摘要】 随着宽可调谐激光光源、全波光纤和超宽带光放大器的出现,密集波分复用日益成为光纤通信的主流技术,作为复用/解复用器核心的光滤波技术备受关注。信道数目的不断增加使得信道间隔不断减小,这对传统的滤波器提出了严峻的挑战,而奇偶交错滤波器(Interleaver)技术的出现使许多传统滤波器技术在密集波分复用的新应用中重新找到了自己的位置。鉴于此,本论文从实验和理论上对基于马赫-曾德尔(Mach-Zehnder)干涉仪的全光纤Interleaver进行了研究。本文首先从最简单的光纤马赫-曾德尔干涉仪的结构和原理出发,对器件的输出特性,色散特性,以及隔离度等参数进行了比较全面的分析和讨论。在实验中,我们采用了小数重合法测量两干涉臂的的光程差。 为了改善滤波器的滤波特性,本文重点研究了一种傅里叶顶端平坦型的全光纤Interleaver。这种方案可使输出波形通带平坦,阻带加宽,输出稳定性隔离度均得到提高,在理论上采用梯形波近似的方法,给出了参数优化结果,并进行了实验研究。接下来本文又分析了光纤反射式马赫-曾德尔干涉仪型、引入光纤环的马赫-曾德尔干涉仪型和引入取样光纤光栅的马赫-曾德尔干涉仪型全光纤Interleaver的输出特性和结构参数对滤波特性的影响。在文章的最后,结合实验对基于马赫-曾德尔干涉仪型的全光纤Interleaver的温度、应力等方面的稳定性进行了分析。更多还原

【Abstract】 As the key component of multiplexer/demultiplexer, optical filter technology has been fueling great interest with the emergence of wide range tunable laser source, all-wave fiber, and wide band optical amplifiers, which is promoting DWDM to a leading edge of optical fiber communication. With the increasing of the number of channels and the decreasing of the wavelength spacing between channels, the traditional filter technologies become too difficult and costly to implement. However, the appearance of interleaver makes it possible for the traditional filters to perform their functions in the new applications. In this paper, the all optical fiber interleaver technology based on Mach- Zehnder interferometer is studied experimentally and theoretically.At first, the theory and structure of simply all optical fiber Mach- Zehnder interferometer is introduced. And the transmission property, chromatic despersion, isolation and fabricate techniques are analyzed in detail. In experiment, excess fraction method was introduced into the measurement of the optical path difference.To improve the transmission property, a all optical fiber fourier flat-top interleaver is studied. This kind of interleaver has flat pass band, broad cut band, high stability, and high isolation. Trapezium wave was utilized to optimize parameters of the kind of interleaver. This kind of interleaver is also studied experimentally.Then the all opical fiber reflected Mach-Zehnder interferometric interleaver, Mach-Zehnder interferometric interleaver with fiber loop, Mach-Zehnder interferometric interleaver with sampled fiber gratings are studied in the relation of parameters and transmission property.In the last part, the stability of all optical fiber interleaver based on Mach-Zehnder interferometer is analyzed in temperature, stress and retortion etc.更多还原