@article{Shahi_Soudi_Ghorbani_Jalali_Harun_2023, title={Application of four-wave mixing for estimation of nonlinear parameters in compact ring cavity laser based on Bi-EDF}, volume={15}, url={https://oiccpress.com/journal-of-theoretical-and-applied-physics/article/application-of-four-wave-mixing-for-estimation-of-nonlinear-parameters-in-compact-ring-cavity-laser-based-on-bi-edf-2/}, DOI={10.30495/jtap.152108}, abstractNote={One of the main degradation effects of optical fibres with dense channel width and poor chromatic dispersion on the fiber is four-wave mixing (FWM). Cross talk produced by four-wave mixing in optical fibers limits the efficiency of long-distance wavelength-division multiplexing (WDM) optical communication systems, which can be regulated for non-linearity purposes in optical telecommunication, particularly when channel wavelengths are set near the zero-dispersion wavelength of optical fibers. As a result, a small fiber segment with a high nonlinearity can be used to support the FWM. Using the four-wave mixing method, the experimental set-up of a compact fiber ring laser based on different lengths of nonlinear Bismuth-Erbium doped fiber (Bi-EDF, 181 and 215 cm) is used in this paper. Via the degenerate four-wave mixing effect, these two gain nonlinear media have been successfully used to stabilize a dual-wavelength fiber laser with and without nonlinear photonic crystal fiber (PCF) at room temperature for  and n2 estimation of nonlinear parameters and FWM performance of optical fiber. Experiments show that using a high non-linear bismuth-erbium doped fiber (Bi-EDF) in implementing an FWM program for non-linear PCF parameters has specific and unique benefits. Furthermore, the FWM effect can be used for signal amplification, wavelength transfer, phase conjugation, and high-speed optical switching. The proposed configuration’s special function is explained by the Bi-EDF and PCF fiber’s coupled relationship in FWM scattering.}, number={1}, journal={Journal of Theoretical and Applied Physics}, publisher={OICC Press}, author={Shahi, Sharifeh and Soudi, Sasan and Ghorbani, Yalda and Jalali, Bahareh Khaksar and Harun, Sulaiman Wadi}, year={2023}, month={Nov.}, keywords={Non-linear optics, Photonic crystal fiber, Bi-EDF, Four-wave mixing} }