302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier

Xiang Zhao; Yifeng Yang; Hui Shen; Xiaolong Chen; Gang Bai; Jingpu Zhang; Yunfeng Qi; Bing He; Jun Zhou

doi:doi:10.1017/hpl.2017.29

High Power Laser Science and Engineering, 2017, 5 (4): 04000e31, Published Online: Nov. 21, 2018

302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier

Xiang Zhao ^1,2Yifeng Yang ¹Hui Shen ¹Xiaolong Chen ¹Gang Bai ^1,2Jingpu Zhang ^1,2Yunfeng Qi ¹Bing He ^1,3Jun Zhou ^1,3,4,†

Author Affiliations

¹ Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

² University of Chinese Academy of Sciences, Beijing 10049, China

³ Nanjing Institute of Advanced Laser Technology, Nanjing 210038, China

⁴ Nanjing Zhongke Shenguang Technology Co. Ltd., Nanjing 210038, China

Figures & Tables

Fig. 1. Experimental setup of monolithic fiber amplifier system (MO: master oscillator; PA, pre-amplifier; CO, collimator).

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Fig. 2. (a) Simulated spectra and (b) experimental spectra of phase-modulated triple-frequency seed laser.

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Fig. 3. (a) Strain distribution along the active fiber. (b) SBS gain spectra of strained and unstrained fiber.

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Fig. 4. Backward power as a function of the output power.

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Fig. 5. Overlap of the SBS gain spectra (a) without the modulation frequency; (b) with the modulation frequency of 1 GHz; (c) with the modulation frequency of 2 GHz [the short dashed line in (b) represents envelope of the total SBS gain].

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Fig. 6. Backward power as a function of the output power with different modulated frequencies.

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Fig. 7. (a) Output power and backscattering power versus pump power. (b) Emission spectra of backward scattering. (c) Emission spectra of forward output laser. (d) FPI scanning spectra of triple frequency at the maximum output power.

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Xiang Zhao, Yifeng Yang, Hui Shen, Xiaolong Chen, Gang Bai, Jingpu Zhang, Yunfeng Qi, Bing He, Jun Zhou. 302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier[J]. High Power Laser Science and Engineering, 2017, 5(4): 04000e31.

302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier

Fig. 1. Experimental setup of monolithic fiber amplifier system (MO: master oscillator; PA, pre-amplifier; CO, collimator).

Fig. 2. (a) Simulated spectra and (b) experimental spectra of phase-modulated triple-frequency seed laser.

Fig. 3. (a) Strain distribution along the active fiber. (b) SBS gain spectra of strained and unstrained fiber.

Fig. 4. Backward power as a function of the output power.

Fig. 5. Overlap of the SBS gain spectra (a) without the modulation frequency; (b) with the modulation frequency of 1 GHz; (c) with the modulation frequency of 2 GHz [the short dashed line in (b) represents envelope of the total SBS gain].

Fig. 6. Backward power as a function of the output power with different modulated frequencies.

Fig. 7. (a) Output power and backscattering power versus pump power. (b) Emission spectra of backward scattering. (c) Emission spectra of forward output laser. (d) FPI scanning spectra of triple frequency at the maximum output power.

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302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier

Fig. 1. Experimental setup of monolithic fiber amplifier system (MO: master oscillator; PA, pre-amplifier; CO, collimator).

Fig. 2. (a) Simulated spectra and (b) experimental spectra of phase-modulated triple-frequency seed laser.

Fig. 3. (a) Strain distribution along the active fiber. (b) SBS gain spectra of strained and unstrained fiber.

Fig. 4. Backward power as a function of the output power.

Fig. 5. Overlap of the SBS gain spectra (a) without the modulation frequency; (b) with the modulation frequency of 1 GHz; (c) with the modulation frequency of 2 GHz [the short dashed line in (b) represents envelope of the total SBS gain].

Fig. 6. Backward power as a function of the output power with different modulated frequencies.

Fig. 7. (a) Output power and backscattering power versus pump power. (b) Emission spectra of backward scattering. (c) Emission spectra of forward output laser. (d) FPI scanning spectra of triple frequency at the maximum output power.

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