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光孤子通信系统具有许多线性光学通信系统无法比拟的优越性,但至今仍然没有一个基于光孤子的通信系统投入使用,这主要是由于光孤子本身存在的一些缺点造成的。介绍了光孤子和准光孤子的理论,通过数值模拟,找到了一类新的准光孤子,而标准的NLS孤子只是其中的一种特殊情况,并发现通过调节光纤的结构参数,就可以调整准光孤子的脉冲宽度,从而能够很好地避免频率带宽的浪费,然后比较了光孤子和准光孤子的传输性能,结果表明:准光孤子克服了光孤子许多内在的不足,拥有光孤子不可比拟的优点,并详细分析了准光孤子实际利用存在的问题。
Optical soliton communication system has many superiority of linear optical communication system, but so far no soliton-based communication system is put into use, which is mainly caused by some shortcomings of optical soliton itself. The theory of optical soliton and quasi-soliton is introduced. A new type of quasi-soliton soliton is found by numerical simulation. The standard NLS soliton is just one of the special cases. It is found that by adjusting the structural parameters of the optical fiber, it can be adjusted The pulse width of the quasi-optical soliton can avoid the waste of the frequency bandwidth well. Then the propagation properties of the optical soliton and the quasi-soliton are compared. The results show that the quasi-soliton overcomes many inherent problems of the optical soliton, Compared with the advantages, and a detailed analysis of the actual use of soliton problems exist.