Spectrally efficient SBS suppression via seed laser current modulation

被引：1
作者：
Wong, W. X. [1 ]
Lee, S. Q. [1 ]
Lim, W. Y. [1 ]
Ye, Y. E. [1 ]
机构：
[1] DSO Natl Labs, 12 Sci Pk Dr, Singapore 118230, Singapore
来源：
FIBER LASERS XXI:TECHNOLOGY AND SYSTEMS | 2024年 / 12865卷
关键词：
Stimulated Brillouin Scattering; Fiber Laser; Linewidth Broadening; Optical Fibers; Semiconductor Lasers; STIMULATED BRILLOUIN-SCATTERING; PHASE MODULATION;
D O I：
10.1117/12.3008221
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：
We report a novel approach to linewidth broadening of the seed laser spectrum for the suppression of Stimulated Brillouin Scattering (SBS) in high power fiber lasers. The seed laser linewidth is broadened through frequency modulation induced by current modulation of a Distributed-Feedback (DFB) laser, while the amplitude modulation is suppressed through a similar, out- of-phase current modulation of a Semiconductor Optical Amplifier (SOA). This approach produces an ideal, uniformly distributed seed laser spectrum for efficient suppression of SBS. SBS suppression is demonstrated on a 1kW fiber amplifier with 95% of output power within a 5.5GHz linewidth (5.7GHz FWHM).
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页数：11
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