High-birefringence saturable absorption ring self-excitation multi-wavelength high-OSNR Brillouin fiber laser

A technology of saturable absorption and fiber lasers, which is applied in the field of self-excited multi-wavelength high OSNR Brillouin fiber lasers with high birefringence saturable absorption rings. Effects of multi-wavelength oscillation, suppression of modal competition, and reduction of threshold power
CN111446609AInactive Publication Date: 2020-07-24TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2020-07-24
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a high-birefringence saturable absorption ring self-excitation multi-wavelength high-OSNR Brillouin fiber laser. The fiber laser comprises a bidirectional erbium-doped fiber amplifier EDFA, a single-mode fiber SMF, a high-birefringence saturable absorption ring, an optical circulator, a first optical coupler and a spectrum analyzer. In the invention, a linear structure with a high-birefringence saturable absorption ring is utilized; threshold power required by erbium-doped fiber pumping is effectively reduced; and meanwhile, an occurrence probability of a space hole burning effect (SHB effect) is increased, the SHB effect can effectively inhibit occurrence of modal competition, stable multi-wavelength oscillation, a high birefringence effect in a high birefringencesaturable absorption ring and a saturable absorption narrow-band filtering characteristic are promoted, and the number of self-shock wave lengths and high OSNR of a multi-wavelength laser are guaranteed respectively.
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Description

technical field

[0001] The invention relates to the technical field of optical devices, in particular to a high birefringence saturable absorption ring self-excited multi-wavelength high OSNR Brillouin fiber laser. Background technique

[0002] The wide application of Dense Wavelength Division Multiplexing (DWDM) in optical communication networks has made multi-wavelength fiber lasers more and more people's attention. Due to its simple structure, narrow linewidth, stable multi-wavelength output capability, low cost and wide tunable range, Brillouin fiber lasers have attracted more and more international attention. The optical signal-to-noise ratio (OSNR) determines the quality of a laser signal. Especially in WDM, OSNR is a crucial reference index. The higher the OSNR, the fewer transmission errors. Conversely, a lower OSNR may increase maintenance costs , reducing service quality and service life.

[0003] Searching in the existing literature found that domestic and forei...

Claims

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