Because of the function of maintaining the polarization state of light (e.,【Picture 1】), the applications of PM fibers cover a variety of fields such as communications, medicine, sensing, and military, etc. In fiber optics, polarization-maintaining optical fiber (PMF or PM fiber) is a single-mode optical fiber in which linearly polarized light, if properly launched into the fiber, maintains a linear polarization during propagation, exiting the fiber in a specific linear polarization state; there is. Polarization maintaining (PM) fiber is a specialized optical fiber designed to maintain the polarization state of light as it propagates through the fiber. This unique property makes PM fiber an essential component in various advanced optical systems, particularly in applications where polarization. Fiber Optical Gyroscope (FOG) is an interferometric fiber optic sensor that has achieved great commercial success.
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