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

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...

AI Technical Summary

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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