SBS suppression in high brightness, all-fiberized and linearly polarized amplifiers by rectangular spectrum

被引：0
作者：
Meng, Daren [1 ]
Ma, Pengfei [1 ,2 ,3 ]
He, Xubao [1 ]
Lai, Wenchang [1 ]
Su, Rongtao [1 ,2 ,3 ]
Ma, Yanxing [1 ,2 ,3 ]
Zhou, Pu [1 ,2 ,3 ]
Yang, Lijia [1 ,2 ,3 ]
机构：
[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Hunan, Peoples R China
[2] State Key Lab Pulsed Power Laser Technol, Changsha 410073, Hunan, Peoples R China
[3] Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Hunan, Peoples R China
来源：
FIFTH INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER | 2019年 / 11046卷
基金：
中国国家自然科学基金;
关键词：
fiber lasers and amplifiers; Stimulated Brillouin scattering; rectangular spectrum; NARROW-LINEWIDTH; PHASE MODULATION; HIGH-POWER; KILOWATT;
D O I：
10.1117/12.2523633
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Stimulated Brillouin scattering (SBS) suppression in high power, narrow linewidth and all polarization-maintained amplifiers with near diffraction limited (NDL) beam quality by rectangular optical spectrum is demonstrated. Rectangular spectrum is generated by using cascaded phase modulations. In the preliminary experiment, output power of 509 W with spectral linewidth of similar to 3 GHz is obtained. At maximal output power, the polarization extinction ratio (PER) is measured to be similar to 14 dB and the beam quality (M-2 factor) is M-2 similar to 1.2. The technique presented give useful reference to control the spectral linewidth in high brightness fiber amplifiers. By combining with other linewidth controlling techniques, several kilowatt-level output power with spectral linewidth of < 10 GHz could be expected.
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页数：5
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