Deep learning has emerged as a powerful tool for solving complex problems in a wide range of domains. The success of deep learning can be attributed to several factors, including the availability of massive datasets, the increasing computing power of modern hardware, and the development of efficient algorithms. Still, In the modern era of information and communication technologies, the demand for faster and more efficient data transmission has driven researchers to explore novel approaches to enhance communication systems, among them is the optical approach for such a problem. In our lab, we develop a fully optical deep learning network that is based on high order spatial mode, and the ultrafast nonlinear four wave mixing interactions inside multimode fiber.