Free space optical communication (FSO) is growing technology with attractive features like high data rate, no license requirement, high security, and easy installation. But FSO is mainly affected due to the environmental conditions like atmospheric turbulence and many other interferences. Therefore, to improve this disadvantage techniques like spectrum slicing wavelength division multiplexing (SSWDM) were used. SSWDM is used to increase the system performance by providing high capacity and efficiency, it will also help to increase distance of transmission. In this paper, we have compared the performance of FSO with SSWDM and FSO without SSWDM to observe the results for different weather conditions. The results show that spectrum slicing wavelength division multiplexing gives better results for different climatic conditions which improves the system performance.

自由空间光通信 (FSO) 是一种不断发展的技术，具有高数据速率、无许可证要求、高安全性和易于安装等吸引人的特性。但FSO主要受到大气湍流等环境条件和许多其他干扰的影响。因此，为了改善这一缺点，使用了频谱切片波分复用 (SSWDM) 等技术。SSWDM用于通过提供高容量和效率来提高系统性能，它还有助于增加传输距离。在本文中，我们比较了 FSO 与 SSWDM 和没有 SSWDM 的 FSO 的性能，以观察不同天气条件下的结果。