Tunable and switchable harmonic h-shaped pulse generation in a 3.03  km ultralong mode-locked thulium-doped fiber laser

Junqing Zhao; Lei Li; Luming Zhao; Dingyuan Tang; Deyuan Shen; Lei Su

doi:doi:10.1364/PRJ.7.000332

Photonics Research, 2019, 7 (3): 03000332, Published Online: Mar. 7, 2019

Tunable and switchable harmonic h-shaped pulse generation in a 3.03 km ultralong mode-locked thulium-doped fiber laser

Junqing Zhao ¹Lei Li ¹Luming Zhao ^1,2,*Dingyuan Tang ¹Deyuan Shen ¹Lei Su ²

Author Affiliations

¹ Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging Industry, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China

² School of Engineering and Materials Science, Queen Mary University of London, London, UK

Figures & Tables

Fig. 1. Experimental layout.

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Fig. 2. Pump power induced harmonic switching with the (a)–(e) pulse trains and (f)–(j) RF spectra.

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Fig. 3. Output optical spectra with different pump powers, also corresponding to different orders of HML.

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Fig. 4. Pump-power-induced evolution with the single pulse envelope when the TDF laser is operated with a fundamental repetition rate.

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Fig. 5. Several pulse trains with different orders of HML switched by PS manipulation with a fixed pump power of ∼4.15 W.

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Fig. 6. Detailed RF characteristics with the (a) FML and (b)–(h) different orders of HML.

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Fig. 7. Detailed pulse envelope of each individual h-shaped pulse with PS-fixed pump-power-related different orders of HML.

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Fig. 8. Evolutions of pulse peak duration with respect to the (a) pump power with a fixed PS, and (b) HML order with a fixed pump power.

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Fig. 9. Average output power versus pump power for PS-induced different orders of HML.

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Junqing Zhao, Lei Li, Luming Zhao, Dingyuan Tang, Deyuan Shen, Lei Su. Tunable and switchable harmonic h-shaped pulse generation in a 3.03 km ultralong mode-locked thulium-doped fiber laser[J]. Photonics Research, 2019, 7(3): 03000332.

Tunable and switchable harmonic h-shaped pulse generation in a 3.03 km ultralong mode-locked thulium-doped fiber laser

Fig. 1. Experimental layout.

Fig. 2. Pump power induced harmonic switching with the (a)–(e) pulse trains and (f)–(j) RF spectra.

Fig. 3. Output optical spectra with different pump powers, also corresponding to different orders of HML.

Fig. 4. Pump-power-induced evolution with the single pulse envelope when the TDF laser is operated with a fundamental repetition rate.

Fig. 5. Several pulse trains with different orders of HML switched by PS manipulation with a fixed pump power of ∼4.15 W.

Fig. 6. Detailed RF characteristics with the (a) FML and (b)–(h) different orders of HML.

Fig. 7. Detailed pulse envelope of each individual h-shaped pulse with PS-fixed pump-power-related different orders of HML.

Fig. 8. Evolutions of pulse peak duration with respect to the (a) pump power with a fixed PS, and (b) HML order with a fixed pump power.

Fig. 9. Average output power versus pump power for PS-induced different orders of HML.

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Tunable and switchable harmonic h-shaped pulse generation in a 3.03 km ultralong mode-locked thulium-doped fiber laser

Fig. 1. Experimental layout.

Fig. 2. Pump power induced harmonic switching with the (a)–(e) pulse trains and (f)–(j) RF spectra.

Fig. 3. Output optical spectra with different pump powers, also corresponding to different orders of HML.

Fig. 4. Pump-power-induced evolution with the single pulse envelope when the TDF laser is operated with a fundamental repetition rate.

Fig. 5. Several pulse trains with different orders of HML switched by PS manipulation with a fixed pump power of ∼4.15 W.

Fig. 6. Detailed RF characteristics with the (a) FML and (b)–(h) different orders of HML.

Fig. 7. Detailed pulse envelope of each individual h-shaped pulse with PS-fixed pump-power-related different orders of HML.

Fig. 8. Evolutions of pulse peak duration with respect to the (a) pump power with a fixed PS, and (b) HML order with a fixed pump power.

Fig. 9. Average output power versus pump power for PS-induced different orders of HML.

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