In this numerical work, we present some cases of transmission behavior in a power-symmetric, polarization-imbalanced nonlinear optical loop mirror (NOLM) through a three-dimensional (3D) analysis. The study has been implemented using the Jones matrices for inputs at linear and circular polarization and varying the length in the loop. The results show control over the switching power and the maximal transmission, which let us see more easily the graph visualization at the output of a scheme. However, we can determine the characteristics of the experimental operation (fiber loop, input power, angles of the retarder plates, critical power, and input polarization). These results can be used to establish regions for potential applications in optical communications such as ultrafast optical signals processing, optical switching, demultiplexing, filtering, logic gates, and pulse compression.
For remote data acquisition, the integration of optical and electronic instrumentation systems (OSA, oscilloscope, polarimeter) is proposed, reaching automation through control protocols (TCP/IP). A graphical interface was developed through the LabVIEW virtual environment, using MATLAB to present the results of accumulated spectra and temporal evolutions. Using our automated data acquisition system, we analyze in detail the operating characteristics and stability at the output of a passively mode-locked fiber laser (figure-eight laser, F8L), looking to expand the study on the evolution of the polarization and the behavior of the pulses according to the adjustment of the polarization control plates included in the laser cavity.
A magnetic field sensor based on a Mach-Zehnder interferometer with standard single mode fiber (SMF-28) is proposed. Here, the MZI was developed by using tapered optical fiber technique. Moreover, the Mach-Zehnder interferometer is manufactured with two tapers, with a core diameter of 25~40 μm and a length of 5 mm, and a separation between the tapers about of 4~6.5 cm. The MZI was covered by a fluid with magnetic proprieties. Performing experiments with magnets, coils and transformers, hoping that the proposed sensor offers a good option to measure the magnetic field in electrical devices.