A microcavity frequency stabilization based micro narrow linewidth atomic frequency-modulated faraday laser

Abstract

This invention discloses a miniature narrow-linewidth atomic frequency-selective Faraday laser based on microcavity frequency stabilization. It is characterized by comprising a Faraday laser, an electro-optic modulator, a whispering-gallery microcavity module, a photodetector, a signal generator, and a servo loop feedback system. The laser output from the Faraday laser is split into two beams by a beam splitter. One beam is modulated by the electro-optic modulator and input to the whispering-gallery microcavity module, while the other beam serves as the frequency-stabilized laser output. The electro-optic modulator receives the radio frequency drive signal from the signal generator to modulate the input laser. The whispering-gallery microcavity module stabilizes the input laser frequency onto the whispering-gallery microcavity. The photodetector converts the optical signal output from the whispering-gallery microcavity module into an electrical signal, which is then input to the servo loop feedback system. The servo loop feedback system controls the Faraday laser based on the input signal. This invention provides a narrow-linewidth, high-stability, low-cost, and miniaturized laser source.

Images