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Feedback locking structure capable of simultaneously realizing laser frequency stabilization and noise suppression

A technology with stable frequency and noise suppression, which is applied in the field of lasers, can solve the problems of large volume and complex optical structure, and achieve the effect of simplifying the optical structure, reducing the overall volume, and realizing noise suppression

Inactive Publication Date: 2020-03-17
CHENGDUSCEON ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of complex optical structure and large volume in the current laser linewidth narrowing scheme, the purpose of the present invention is to provide a feedback locking structure that simultaneously realizes laser frequency stabilization and noise suppression

Method used

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  • Feedback locking structure capable of simultaneously realizing laser frequency stabilization and noise suppression
  • Feedback locking structure capable of simultaneously realizing laser frequency stabilization and noise suppression
  • Feedback locking structure capable of simultaneously realizing laser frequency stabilization and noise suppression

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Embodiment 1

[0042] Such as Figure 1-7 As shown, the feedback locking structure for simultaneously realizing laser frequency stabilization and noise suppression provided by this embodiment includes a frequency-scannable semiconductor laser 1, an electro-optic modulator 2, a beam splitter 3, an atomic saturable absorption optical path 4, an acousto-optic Modulator frequency shifting optical path 5, first photodetector 61, second photodetector 62, first mixer 71, second mixer 72, first phase shifter 81, second phase shifter 82, the first A servo circuit 91, a second servo circuit 92, an optical fiber interferometer 10 and a signal generator 11; the laser output end of the semiconductor laser 1 is connected to the laser incident end of the electro-optic modulator 2, and the laser light of the electro-optic modulator 2 The output end is connected to the laser incident end of the beam splitter 3, and the laser transmission end of the beam splitter 3 is connected to the laser entrance and exit ...

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PUM

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Abstract

The invention relates to the technical field of lasers, and discloses a feedback locking structure capable of simultaneously realizing laser frequency stabilization and noise suppression. On one hand,an atomic saturation absorption light path and a servo circuit for the feedback control of a laser piezoelectric ceramic control end are adopted in a first feedback locking loop, so that the laser frequency of the laser can be locked on a spectral line of the atomic saturation absorption spectrum, and the purpose of frequency stabilization is achieved; on the other hand, an optical fiber interferometer and a servo circuit for the feedback control of a laser current modulation end are adopted in a second feedback locking loop, so that the signal noise of the laser can be effectively suppressed, the purpose of noise suppression is achieved. Meanwhile, compared with an existing laser line width suppression scheme, an optical structure is greatly simplified, the overall size is reduced, the precise matching of a light path and a space mode of a reference cavity is not needed, and the implementation difficulty is reduced. In addition, the feedback locking structure also has the advantagesof easiness in integration, no need of free space optical path adjustment, low environmental parameter sensitivity and the like.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a feedback locking structure for simultaneously realizing laser frequency stabilization and noise suppression. Background technique [0002] In the atomic clock technology, the use of a narrower linewidth laser to detect the transition signal of the atomic clock can improve the signal-to-noise ratio of the signal, thereby improving the frequency stability of the atomic clock. In the detection of atomic clock transition signals, the absorption method is widely used; the absorption method belongs to the amplitude detection, so the amplitude noise of the detection light is required to be very low. In absorption detection, the laser passes through the atomic medium, which will cause the electric susceptibility of the medium to fluctuate with the laser frequency noise. The fluctuation of the electric susceptibility will introduce the fluctuation of the laser light intensit...

Claims

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Application Information

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IPC IPC(8): H01S5/068H01S5/0687
CPCH01S5/06817H01S5/0687
Inventor 黄军超王新文于明园杨林
Owner CHENGDUSCEON ELECTRONICS
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