Explorative Research on 100 mW Magnitude Optical Frequency Transmission Via Fiber

In this work, we investigate the optical frequency transmission with a magnitude of 100 mW through a 20 m polarization-maintaining fiber, using the phase noise compensation method. In order to minimize potential noise caused by stray light reflections in the fiber, we incorporate two acoustic-optic modulators to spectrally separate the heterodyne signal, effectively suppressing these sources of noise. Our experimental results demonstrate that the modified Allan deviations of fractional frequency stability for 1 s and 10,000 s are approximately 2.5 · 10−17 and 1 · 10−20, respectively. This research contributes to the advancement of high-power optical frequency transmission via optical fiber.