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Method and device for stabilizing 1529 nm optical fiber communication laser frequency

A fiber optic communication and laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of limitation, frequency stability improvement, frequency modulation noise effect, etc., and achieve the effect of compact structure and high frequency stability

Inactive Publication Date: 2014-05-14
SHANXI UNIV
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Problems solved by technology

[0006] The present invention provides a method and device for stabilizing the 1529nm optical fiber communication laser frequency in order to solve the technical problem that the existing optical communication band 1529nm laser frequency stabilization technology is affected by the noise caused by frequency modulation, thereby limiting the improvement of its frequency stability.

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  • Method and device for stabilizing 1529 nm optical fiber communication laser frequency
  • Method and device for stabilizing 1529 nm optical fiber communication laser frequency
  • Method and device for stabilizing 1529 nm optical fiber communication laser frequency

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[0027] A method for stabilizing the frequency of a 1529nm optical fiber communication laser, comprising the following steps: (a) locking a beam to the hyperfine energy level 5S of rubidium 87 atoms using polarization spectrum 1 / 2 (F=2)-5P 3 / 2 (F’=3) The 780nm laser on the transition line is converted to σ + Circularly polarized light is then introduced into the rubidium bubble 12 filled with rubidium 87 vapor; (b) a beam of linearly polarized laser output by the 1529nm semiconductor laser 13 is introduced into the rubidium bubble 12, and the 1529nm laser is in the rubidium bubble 12 and 780nm Laser reverse coincidence; (c) Make the output frequency of 1529nm semiconductor laser 13 at 5P 3 / 2 (F'=3)-4D 5 / 2 (F”=4) Scan within a small range of the transition. During the scanning process, the 1529nm linearly polarized light emitted from the rubidium bubble 12 is divided into two beams of light with vertical polarization directions, and the intensity signals of the two beams are...

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Abstract

The invention relates to frequency lock of a laser device in the 1529 nm optical communication wave band, in particular to a method and device for stabilizing the 1529 nm optical fiber communication laser frequency to solve the technical problem that an existing laser frequency stabilization technology for the 1529 nm optical communication wave band is affected by noise brought by frequency modulation. The method for stabilizing the 1529 nm optical fiber communication laser frequency includes the following steps of firstly, converting a bundle of 780 nm laser locked by a polarization spectrum into a sigma+ circularly polarized light, and leading the circularly polarized light to a rubidium bubble filled with rubidium 87 steam; secondly, leading a bundle of linear polarization laser outputted by a 1529 nm semiconductor laser device to the rubidium bubble; thirdly, dividing a 1529 nm laser emitted from the rubidium bubble into two bundles of light with the perpendicular polarization directions, collecting magnitude signals of the two bundles of light, converting the magnitude signals into corresponding electrical signals respectively, and subtracting one of the electric signals from the other electrical signal to obtain a two-photon polarization spectrum signal; fourthly, feeding the two-photon polarization spectrum signal back to the 1529 nm semiconductor laser device. The method and the device can be applied to the superfine spectrum field, the frequency standard field, the precision measurement field and other fields.

Description

technical field [0001] The invention relates to frequency locking of a 1529nm laser in the optical communication band, in particular to a method and device for stabilizing the frequency of a 1529nm optical fiber communication laser. Background technique [0002] The optical communication network is the basic platform of the modern communication network. The dense wavelength division multiplexing (DWDM) technology of optical communication can greatly increase the communication capacity. To further improve the communication capacity, it is necessary to reduce the channel spacing, so the crosstalk between channels becomes more serious. At present, people use a variety of atomic and molecular spectral lines for laser wavelength calibration in the 1.5-micron optical communication band. High frequency stability, small size, and portable 1.5-micron wavelength reference source have become a research hotspot. Improve the frequency stability of the laser frequency stabilization syste...

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Application Information

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IPC IPC(8): H01S3/137
Inventor 王军民刘慧丰王杰杨保东何军
Owner SHANXI UNIV
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