We report on a short-cavity polarization beat-frequency distributed Bragg reflector (DBR) fiber laser that can operate in an unprecedentedly wide range of temperatures from ${-}{{200}}^\circ {\rm{C}}$ to 500°C. The beat-frequency signal inherited by the intrinsic fiber birefringence enables implementation of the laser as an eligible temperature or hydrostatic pressure sensor. Furthermore, type-IIa Bragg reflectors allow the annealing of high temperature on the laser cavity to suppress the phase noise of the lasing signal effectively. This research will guide future attempts to achieve high-precision sensing and high-performance signal generation using polarized beat-frequency DBR fiber lasers in harsh environments.

中文翻译：

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耐高温的紧凑型偏振异质掺DBR光纤激光传感器

我们报道了一种短腔偏振拍频分布布拉格反射器（DBR）光纤激光器，该激光器可以在$ {-} {{200}} ^ \ circ {\ rm {C}} $到500°C。本征光纤双折射所继承的拍频信号使激光器可以用作合格的温度或静水压力传感器。此外，IIa型布拉格反射器允许对激光腔进行高温退火，以有效抑制激光信号的相位噪声。这项研究将指导未来在恶劣环境中使用偏振拍频DBR光纤激光器实现高精度传感和高性能信号生成的尝试。