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High Power Laser Science and Engineering, Volume. 7, Issue 4, 04000e65(2019)
Generation of 100 nJ pulse, 1 W average power at from an intermode beating mode-locked all-fiber laser
We report on the investigation of intermode beating mode-locked (IBML) pulse generation in a simple all-fiber Tm
1 Introduction
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The well-established ways to generate
Besides these real saturable absorbers (SAs), some other artificial SAs-based passive mode lockers have gradually come into researchers’ sight and attracted great attention, e.g., nonlinear polarization rotation (NPR)[
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2 Principle of intermode beating mode locking
The mechanism of IBML fiber laser can be briefly described as follows. Pump source possesses multi-longitudinal modes with mode frequencies
3 Experimental setup
Figure
4 Results and discussion
When 10% intracavity laser is output, this TDFL emits CW laser at a pump power of 2 W. Further increase in the pump power to 2.5 W initiates the IBML operation. The stable mode-locked pulse can keep running with the pump power ranging from 2.5 to 3.4 W. The maximum average output power of this IBML TDFL is
Take the IBML TDFL with 90% output ratio as an example; the detailed laser outputs are exhibited. Figure
According to the pulse repetition rate measured by the frequency spectrum analyzer, the single pulse energy of the IBML TDFL with laser output ratio of 90% is calculated and presented in Figure
At last, the typical output characteristic parameters of the IBML TDFLs with different laser output ratios are summarized in Table
5 Conclusion
To conclude, we have successfully demonstrated the IBML operation in a simple linear cavity 1983 nm TDFL by matching longitudinal-mode frequency between 793 nm laser and TDFL for the first time, to the best of our knowledge. The generated IBML pulse has the repetition rate of
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Jiaji Zhang, Duanduan Wu, Ruwei Zhao, Rongping Wang, Shixun Dai. Generation of 100 nJ pulse, 1 W average power at from an intermode beating mode-locked all-fiber laser[J]. High Power Laser Science and Engineering, 2019, 7(4): 04000e65
Category: Research Articles
Received: Jul. 31, 2019
Accepted: Nov. 7, 2019
Published Online: Dec. 16, 2019
The Author Email: Duanduan Wu (wuduanduan@nbu.edu.cn)