|
Large mode field reverse polarization maintaining optical fiber coupler (LMFRPM-OFC) is the key optical fiber component of high power fiber laser, which plays an important role in the fields of high power polarized laser, etc. The polarization temperature dependence of LMFRPM-OFC means that reverse extinction ratio of polarized laser transmitted through the optical fiber coupler is affected by the temperature change. The temperature change will cause the birefringence and polarization state of the optical fiber coupler to change, thus affecting the stable transmission of polarized laser. Therefore, it is of great significance to study the polarization temperature characteristics of optical fiber couplers. In this paper, the polarization state of optical fiber coupler samples is tested. Test results: In the process of temperature change, the polarization state of the optical fiber coupler to change, and the change trend is opposite to the direction of temperature change. This phenomenon is due to the change of the structure in the stress zone in the LMFRPM-OFC caused by the temperature change, which affects the polarization state of the output high-power polarized lasers. In this paper, the polarization temperature dependence of LMFRPM-OFC is studied through active or passive cooling. The polarization temperature dependence of LMFRPM-OFC is effectively reduced through experiments of active cooling and passive cooling, and the reliability of polarization output of LMFRPM-OFC and high-power polarized lasers is improved.
|
