Asymmetric double Sagnac ring wide tuning high optical signal-to-noise-ratio Brillouin fiber laser

A noise-ratio Brillouin and fiber laser technology, applied to lasers, laser components, phonon exciters, etc., can solve the problems of output laser tunable range and optical signal-to-noise ratio.

Inactive Publication Date: 2020-07-24
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, there are still deficiencies: although a certain range of tunable output Brillouin lasers has been achieved, the tunable range and optical signal-to-noise ratio of the output lasers are not ideal

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  • Asymmetric double Sagnac ring wide tuning high optical signal-to-noise-ratio Brillouin fiber laser

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[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] Such as figure 1 As shown, the present invention provides a kind of asymmetric double Sagnac ring width tuning high optical signal-to-noise ratio Brillouin fiber laser, comprising: bidirectional erbium-doped fiber amplifier EDFA1, single-mode fiber SMF2, unpumped erbium-doped fiber Sagnac ring 3, Polarization-maintaining fiber Sagnac ring 7 and spectrum analyzer 9;

[0019] Among them, the unpumped erbium-doped fiber Sagnac ring 3 is formed by connecting the two ends of the unpumped erbium-doped fiber 6 with the first 3 dB coupler 41 to form a closed loop; the polarization-maintaining fiber Sagnac ring 7 includes a polarization-maintaining fiber 8 and a first polarization controller 51 , the second polarization ...

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Abstract

The invention relates to an asymmetric double Sagnac ring wide tuning high optical signal-to-noise-ratio Brillouin fiber laser. The asymmetric double Sagnac ring wide tuning high optical signal-to-noise-ratio Brillouin fiber laser comprises a bidirectional erbium-doped fiber amplifier EDFA, a single-mode fiber SMF, a non-pumped erbium-doped fiber Sagnac ring, a polarization maintaining fiber Sagnac ring and a spectrum analyzer. According to the laser, a high optical signal-to-noise ratio of laser output is ensured by utilizing a saturable absorption narrow-band filtering characteristic of thenon-pumped erbium-doped fiber Sagnac ring in the asymmetric double Sagnac rings; and under an effect that a bandwidth of the non-pumped erbium-doped fiber Sagnac ring is increased, laser output with acontinuously adjustable wide tuning range is realized with the polarization maintaining fiber Sagnac ring, and continuously adjustable high optical signal-to-noise ratio laser output within a 50 nm range can be achieved.

Description

technical field [0001] The invention relates to the technical field of optical devices, and more specifically relates to an asymmetric double Sagnac ring width tuned Brillouin fiber laser with high optical signal-to-noise ratio. Background technique [0002] The traditional light sources in the field of optical communication are all based on fixed-wavelength laser modules. With the continuous development and application of optical communication systems, the shortcomings of fixed-wavelength lasers have gradually emerged. With the development of semiconductors and related technologies, people have successfully developed Tunable lasers are produced, that is, different wavelengths within a certain bandwidth are controlled and output on the same laser module, and these wavelength values ​​and intervals meet the requirements of ITU-T. The optical signal-to-noise ratio determines the signal quality of a laser, especially in WDM, the optical signal-to-noise ratio is a crucial refere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/106H01S3/108
CPCH01S3/06787H01S3/06791H01S3/1061H01S3/1086
Inventor 刘毅陈鹏飞郭荣荣顾源琦宁钰刘香莲
Owner TAIYUAN UNIV OF TECH
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