Brillouin scattering behavior in acoustically guiding single-mode optical fibers with different core diameters

Li, Jiang; Wang, Yingying; Yang, Peilong; Zhang, Lei; Yang, Lin; Dai, Shixun; Lou, Cibo

doi:10.1016/j.optcom.2019.125040

Cited by 5 publications

(5 citation statements)

References 34 publications

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“…These results are basically consistent with our previous work. [19] As can be clearly seen, the measured ν B of the SMF is slightly higher than that of the SCF. This result may be related to the core size and the dopant content, such as GeO 2 or F. [23] For the SCF, the refractive index increases with the GeO 2 concentration in the core; thus, the longitudinal velocity decreases, accounting for the lower ν B of the SCF than that of the SMF.…”

Section: Experimental Results and Analysismentioning

confidence: 89%

“…Meanwhile, as we have previously reported, smallcore fibers (SCFs) exhibit a lower threshold power because of their smaller effective mode field area (A eff ) and slightly larger Brillouin gain coefficients than SMFs. [19] Therefore, a MWBFL with a low threshold and high output power can be achieved using an SCF as the Brillouin gain fiber.…”

Section: Introductionmentioning

confidence: 99%

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A low-threshold multiwavelength Brillouin fiber laser with double-frequency spacing based on a small-core fiber*

Wang

et al. 2021

Chinese Phys. B

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We demonstrate multiwavelength Brillouin fiber lasers (MWBFLs) with double-frequency spacing based on a small-core fiber (SCF) and a standard single-mode fiber (SMF), which have core diameters of 5 and 8.8 μm, respectively. Experimental results show that the SCF-based MWBFL exhibits a higher laser output power and a lower pump threshold. The output powers of the SCF-based MWBFL are > 1.4 times those of the SMF-based MWBFL. Moreover, the threshold power required to generate each channel of the SCF-based MWBFL is 59% that of the SMF-based MWBFL. When the same pump power of 180 mW is injected, the number of laser channels generated for the SCF-based MWBFL is 13, which is twice that generated for the SMF-based MWBFL. In addition, the SCF-based MWBFL exhibits good wavelength tunability from 1535 to 1565 nm and temporal stability over an hour.

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Section: Experimental Results and Analysismentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

A low-threshold multiwavelength Brillouin fiber laser with double-frequency spacing based on a small-core fiber*

Wang

et al. 2021

Chinese Phys. B

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“…[24] Li et al reported the BFS is reduced by ∼ 1 GHz and BGS bandwidth is increased by ∼ 2 MHz when the core diameter decreases from 8.8 µm to 3 µm. [25] It is noticed that the germanium concentration of the fiber with a core diameter of 8.8 µm in Ref. [25] is 4 wt%, while the germanium concentration of the fiber with a core diameter of 3 µm is 19 wt%, showing the germanium concentrations of the fibers with different core diameters are different, and the BFS with GeO 2 concentration is about −89 MHz/wt%.…”

Section: Introductionmentioning

confidence: 97%

“…[25] It is noticed that the germanium concentration of the fiber with a core diameter of 8.8 µm in Ref. [25] is 4 wt%, while the germanium concentration of the fiber with a core diameter of 3 µm is 19 wt%, showing the germanium concentrations of the fibers with different core diameters are different, and the BFS with GeO 2 concentration is about −89 MHz/wt%. [26] Li et al showed that core doping GeO 2 concentration has a greater influence on the BFS than the core diameter and reducing fiber core diameter will result in a wider BGS bandwidth.…”

Section: Introductionmentioning

confidence: 97%

“…[26] Li et al showed that core doping GeO 2 concentration has a greater influence on the BFS than the core diameter and reducing fiber core diameter will result in a wider BGS bandwidth. [25] The above results are based on the SMF reported. However, the dependence of BGS characteristics on the GeO 2 concentration and core diameter in large-mode-area (LMA) fibers have not yet been studied in detail.…”

Section: Introductionmentioning

confidence: 99%

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Brillouin gain spectrum characterization in Ge-doped large-mode-area fibers*

Niu¹,

Yang²,

Zhao³

et al. 2021

Chinese Phys. B

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The dependence of Brillouin gain spectrum (BGS) characteristics, including the Brillouin frequency shift (BFS) and the BGS bandwidth, on germanium concentration in large-mode-area Ge-doped passive fibers is theoretically and experimentally investigated. Simulation results show that BFS is inversely proportional to GeO2 concentration, and BGS bandwidth increases with the GeO2 concentration initially, and then followed by a decrease. BGS of four fibers with different GeO2 concentration with core diameters of 10 μm and 20 μm are compared experimentally. Experimental results demonstrate that with the same core diameter, the variation of BFS and BGS bandwidth with GeO2 concentration agrees with the simulation results. Additionally, the BGS characteristics of three large-mode-area passive fibers with diameters of 10 μm, 25 μm, and 30 μm are measured, which confirms that increasing the fiber diameters will cause the BGS bandwidth to broaden. We believe that these results can provide valuable references for the modulation of high-power narrow-linewidth fiber lasers and Brillouin fiber amplifiers.

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Novel Ge-As-Se chalcogenide glass for potential high Brillouin gain coefficient of fiber

Qiu

Dai

Liu

et al. 2023

Ceramics International

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Brillouin scattering behavior in acoustically guiding single-mode optical fibers with different core diameters

Cited by 5 publications

References 34 publications

A low-threshold multiwavelength Brillouin fiber laser with double-frequency spacing based on a small-core fiber*

A low-threshold multiwavelength Brillouin fiber laser with double-frequency spacing based on a small-core fiber*

Brillouin gain spectrum characterization in Ge-doped large-mode-area fibers*

Novel Ge-As-Se chalcogenide glass for potential high Brillouin gain coefficient of fiber

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