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Artificial spectral filtering in dissipative soliton fiber lasers with invisible bandpass filters |
Kong Ling-Jie (孔令杰), Xiao Xiao-Sheng (肖晓晟), Yang Chang-Xi (杨昌喜) |
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China |
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Abstract We numerically study the artificial spectral-filtering effect in dissipative soliton fiber lasers without intracavity spectral filter. It is found that in the dissipative soliton lasers with real saturable absorbers (SAs), the dynamic spectral filtering of the real SAs serves as an artificial spectral filter and contributes to the pulse shaping. While in the dissipative soliton lasers with artificial SAs, such as nonlinear polarization rotation, the spectral filtering introduced by the intracavity polarization-dependent components acts as an artificial spectral filter and shapes the pulses to get mode-locking. The investigation of the artificial spectral-filtering effect reveals the operating mechanisms of the dissipative soliton fiber lasers without visible bandpass filter.
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Received: 19 December 2011
Revised: 14 May 2012
Accepted manuscript online:
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61077032). |
Corresponding Authors:
Yang Chang-Xi
E-mail: cxyang@tsinghua.edu.cn
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Cite this article:
Kong Ling-Jie (孔令杰), Xiao Xiao-Sheng (肖晓晟), Yang Chang-Xi (杨昌喜) Artificial spectral filtering in dissipative soliton fiber lasers with invisible bandpass filters 2012 Chin. Phys. B 21 094210
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