dark cavity laser

Abstract

A dark cavity laser provided by the present disclosure includes: a frequency-stabilized laser output device and a dark-cavity laser device; wherein, the frequency-stabilized laser output device is used to generate laser light, and perform frequency stabilization processing on the generated laser light to output to the dark cavity The laser device is used as the pump light of the dark cavity gain medium; the dark cavity laser device includes a main resonator, and the dark cavity laser gain medium-alkali metal atom gas chamber is arranged inside the cavity of the main resonator; the dark cavity laser device is used for receiving pump light, and form polyatomic coherent stimulated radiation between the dark-cavity laser gain medium-dark-cavity laser gain medium in the alkali metal atomic gas cell-alkali metal atom transition energy level through the weak feedback of the main resonator to generate The dark cavity laser operating in the completely non-resonant region of the main resonant cavity has a narrower output linewidth than the laser in the resonant region, and the energy level shift of the gain medium-alkali metal atoms is zero, which can As an active optical clock, it is suitable for atomic clock systems.

Description

technical field [0001] The present disclosure relates to the field of laser technology, in particular to a dark cavity laser. Background technique [0002] Atomic clocks, as the most sophisticated scientific instruments capable of outputting quantum frequency standards, play an important role in promoting the redefinition of the time second, satellite navigation and positioning, precision scientific measurement, physical theory and other fields. In particular, based on superior accuracy and stability, optical frequency atomic clocks (optical clocks) with optical frequency transitions as reference spectral lines have become a research direction. [0003] In the prior art, optical frequency atomic clocks are mostly based on traditional passive optical clock technology. The general method is to stabilize the laser frequency output by the laser on a precisely designed passive optical resonator (high-precision Fabry-Pérot interferometer) to This enables a more accurate resonant ...

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Problems solved by technology

[0004] However, using this method firstly requires a resonant cavity mirror with a high reflectivity coating, which is very difficult to process; secondly, it needs to ensure the stability of the resonant frequency of the cavity and be immune to noise that affects the resonant frequency, and the system difficulty and complexity are relatively high. high

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