“…An Allan-Werle deviation [49] , [50] , [51] , [52] , [53] analysis has been performed to evaluate the detection limit of the sensor and long-term stability. When the temperature, the modulation current, and the modulation frequency of the laser are set to 25 ℃, 63.9 mA, and 2240 Hz, respectively, the WMS-2 f peak signals are continuously measured and recorded.…”