A 10mhz ultra-narrow linewidth laser and its realization method

A laser and laser technology, applied in the direction of lasers, laser components, semiconductor lasers, etc., can solve problems such as difficult handling and movement, harsh environmental requirements, complex optical clock structure, etc., and achieve the effect of improving the signal-to-noise ratio and improving the utilization rate of atoms

Active Publication Date: 2021-12-28
PEKING UNIV
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Problems solved by technology

However, the optical clock realized by the above technology is complex in structure, large in size, and has strict environmental requirements. It can only be operated in a laboratory environment, and it is difficult to carry and move, and it is not convenient to use.

Method used

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  • A 10mhz ultra-narrow linewidth laser and its realization method

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Embodiment Construction

[0017] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0018] The present invention proposes a 10mHz ultra-narrow linewidth laser and its implementation method. The grating-like velocity spectrum technology is applied to an atomic beam optical clock to generate an extremely narrow spectral line, which is then fed back to the laser through high-speed servo to realize a 10mHz ultra-narrow linewidth. Lasers with narrow linewidths.

[0019] Such as figure 1, in this embodiment, the composition of a 10mHz extremely narrow linewidth laser includes: 657nm laser 1, beam splitting prism 2, ultra-stable optical reference cavity locking system 3, acousto-optic modulator 4, electro-optic modulator group 5, calcium atom furnace 6. Permanent magnet group 7, 423nm laser system 8, photodetector 9, lock-in amplifier 10, acousto-optic modulator drive 11, high-speed servo feedback control circuit 12. The laser...

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Abstract

The invention discloses a 10mHz ultra-narrow linewidth laser and its implementation method. The grating-like velocity spectrum technology is applied to atomic beams of calcium or ytterbium, cesium and other atomic beams to generate extremely narrow spectral lines, and then through high-speed servo feedback For the laser, a laser with a very narrow linewidth of 10mHz is realized. The 10mHz ultra-narrow linewidth laser includes: 657nm laser, beam splitter, ultra-stable optical reference cavity locking system, acousto-optic modulator, electro-optic modulator group, atomic furnace, permanent magnet group, laser system, photodetector, lock-in amplifier, Acousto-optic modulator drive and high-speed servo feedback control circuit; the laser system adopts 423nm laser system or 431nm laser system. By adopting the technical solution provided by the invention, the signal-to-noise ratio of the Ramsey spectrum can be increased nearly 30 times compared with the traditional method, and the laser frequency can be stabilized to the order of 10mHz.

Description

technical field [0001] The invention belongs to the technical field of laser frequency stabilization, and relates to a 10mHz ultra-narrow linewidth laser and its realization method. Multiple electro-optical modulators are used to modulate the laser so that its spectrum appears as a grating-like spectrum, thereby pumping calcium atom beams Or atomic beams such as ytterbium, cesium, etc., improve the utilization rate of atoms, so as to realize the Ramsey spectral line with high signal-to-noise ratio, and use this spectral line to stabilize the laser frequency to realize a laser with extremely narrow linewidth. Background technique [0002] With its excellent frequency stability, ultra-stable lasers have participated in the rapid development of basic physics research and advanced application technology. For example, the latest research progress such as gravitational wave detection and ultra-low phase noise microwave source has verified the great role of ultra-stable lasers in b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/13H01S5/00H01S5/0687H01S3/00
CPCH01S3/0085H01S3/1305H01S5/0085H01S5/0687
Inventor 陈景标潘多刘天宇
Owner PEKING UNIV
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