A Dual-Frequency Faraday Laser

A Dual-Frequency Faraday Laser

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The Faraday laser, with Faraday anomalous dispersion optical filter (FADOF) as frequency-selection element, is a natural narrow-bandwidth light source for laser physic experiments.In this work, a dual-frequency (DF) Faraday laser is demonstrated for the first time on Cs D2 line at 852 nm.The frequencies of the two modes of DF Faraday laser hinge on the peak transition frequencies of 852 nm FADOF Girls 1st Day of School Dress transmittance spectrum corresponding to the ground state F=4 and F=3.The frequency difference between the two modes is tunable over a range of 1.4 GHz with the temperature of Cs vapor cell inside the FADOF.

The linewidth of each laser mode is less than 33 kHz.Furthermore, the most probable linewidth of the beat-note spectra between the two modes is 902.95 Hz at different vapor-cell Infuser Teapot temperatures.Such a DF Faraday laser has many potential applications in atomic physics, such as sub-Doppler spectroscopy and coherent population trapping atomic clocks.