High-peak-power, single-frequency, single-mode, linearly polarized, nanosecond all-fiber laser based on self-phase modulation compensation

2013 ◽  
Vol 52 (30) ◽  
pp. 7331 ◽  
Author(s):  
Rongtao Su ◽  
Pu Zhou ◽  
Pengfei Ma ◽  
Haibin Lü ◽  
Xiaojun Xu
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M. Gong

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Ying Deng ◽  
Shuo Yan ◽  
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2014 ◽  
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2020 ◽  
Vol 49 (4) ◽  
pp. 405003-405003
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张昆 Kun Zhang ◽  
周寿桓 Shouhuan Zhou ◽  
李尧 Yao Li ◽  
张利明 Liming Zhang ◽  
余洋 Yang Yu ◽  
...  

Author(s):  
Rongtao Su ◽  
Pengfei Ma ◽  
Pu Zhou ◽  
Zilun Chen ◽  
Xiaolin Wang ◽  
...  

High-peak-power transform-limited narrow-linewidth nanosecond all-fiber lasers are desired in a range of applications. However, their linewidths will be broadened by self-phase modulation (SPM). We propose a novel concept that generates transform-limited laser pulses by temporally shaping the pulse seed. The impact of the pulse shape on SPM-induced spectral broadening was studied numerically and experimentally. It was found theoretically that the square-shape pulsed laser is immune to SPM-induced spectral broadening. Based on this principle, we built a high-peak-power, linearly polarized, square-shape nanosecond all-fiber laser in a master oscillator power amplifier (MOPA) configuration. Stimulated Brillouin scattering (SBS) limited peak powers of 4.02 kW, 5.06 kW, 6.52 kW and 9.30 kW were obtained at pulse widths of 8 ns, 7 ns, 6 ns and 5 ns. Thanks to the square-shape pulsed seed, the linewidths at maximum peak power remained at 129.5 MHz, 137.6 MHz, 156.2 MHz and 200.1 MHz, respectively, close to the transform-limited values of 110.8 MHz, 126.6 MHz, 147.7 MHz and 177.3 MHz.


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