A laser frequency stabilization device and method based on subnatural linewidth spectrum
A line-width, natural technology, applied in the direction of lasers, laser components, semiconductor lasers, etc., can solve the problems of high cost and complex devices, and achieve the effects of simple devices, improved stability, and easy implementation
Active Publication Date: 2021-06-22
HANGZHOU DIANZI UNIV
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Problems solved by technology
Although coherent spectroscopy based on electromagnetically induced transparency or absorption can obtain subnatural linewidth spectra that are superior to the natural linewidth of atoms, such spectra usually require two laser sources and one of them has stabilized the laser frequency, and the device is relatively complicated. higher cost
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[0038] The present invention is further analyzed below in conjunction with accompanying drawing.
[0039] Two linearly polarized laser beams (pump light and probe light) from the same laser source act on the same batch of alkali metal atoms in the atomic gas cell at the same time. When there is a certain non-zero angle between the polarization directions of the pump light and the probe light and When the propagation direction of the pump light is opposite to that of the probe light in the atomic gas chamber, the pump light and the probe light simultaneously couple multiple energy levels of the ground state of the alkali metal atom, forming a subnatural linewidth spectrum lower than the natural linewidth of the alkali metal atom. According to this subnatural linewidth spectrum, the control circuit of the laser light source is feedback controlled to realize a laser frequency stabilization technology that can achieve subnatural linewidth by using only one laser light source, witho...
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The invention discloses a laser frequency stabilization device and method based on a novel subnatural linewidth spectrum. Two linearly polarized laser beams (pump light and probe light) from the same laser source act on the same batch of alkali metal atoms in the atomic gas cell at the same time. When there is a certain non-zero angle between the polarization directions of the pump light and the probe light and When the propagation direction of the pump light is opposite to that of the probe light in the atomic gas chamber, the pump light and the probe light simultaneously couple multiple energy levels of the ground state of the alkali metal atom, forming a subnatural linewidth spectrum lower than the natural linewidth of the alkali metal atom. According to this subnatural linewidth spectrum, the control circuit of the laser light source is feedback-controlled to realize a laser frequency stabilization device and method that can achieve subnatural linewidth by using only one laser light source, without increasing the complexity of the frequency stabilization device. On the basis of improving the frequency stabilization effect.
Description
technical field [0001] The invention belongs to the technical field of laser frequency stabilization, and relates to a laser frequency stabilization device and method based on a novel subnatural linewidth spectrum, which is used to control the laser linewidth below the atomic natural linewidth, thereby improving the stability of the laser frequency. Background technique [0002] Laser frequency stabilization technology has always been an important research direction in laser control technology. This technology is widely used in many research fields such as laser physics, atomic and molecular physics, and quantum optics. At present, the spectrum used in the commonly used laser frequency stabilization technology is Doppler-free spectrum, such as saturated absorption spectrum, polarization spectrum, etc., and its spectral linewidth is not smaller than the natural linewidth of atoms. Therefore, laser frequency stabilization based on this type of spectrum Technology can only cont...
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IPC IPC(8): H01S5/0687H01S5/068H01S5/0683
CPCH01S5/068H01S5/0683H01S5/0687
Inventor 梁尚清杨国卿王琳
Owner HANGZHOU DIANZI UNIV