This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
The generation of nanosecond square pulse and microsecond harmonic pulse in a passively mode-locked fibre ring laser is demonstrated by inserting a 20 km long single mode fibre in the cavity. The laser operates in anomalous region based on the non-linear polarisation rotation process. The square pulse generation is because of the dissipative soliton resonance effect, which clamps the peak intensity of the laser and broadens the pulse width. The pulse width can be tuned from 28.2 to 167.7 ns. It was found that the square pulse can deliver higher pulse energy compared with the harmonic pulse. The highest recorded pulse energy is 249.8 nJ under the maximum available pump power of 125 mW without pulse breaking.
References
-
-
1)
-
1. Matsas, V.J., Newson, T.P., Zervas, M.N.: ‘Self starting passively mode-locked fiber ring laser exploiting nonlinear polarization switching’, Opt. Commun., 1992, 92, (1–3), pp. 61–66 (doi: 10.1016/0030-4018(92)90219-H).
-
2)
-
12. Chang, W., Ankiewwicz, A., Soto-Crespo, J.M., Akhmediev, N.: ‘Dissipative soliton resonances’, Phys. Rev. A, 2008, 78, (2), p. 023830 (doi: 10.1103/PhysRevA.78.023830).
-
3)
-
7. Wang, L., Liu, X., Gong, Y., Mao, D., Duan, L.: ‘Observation of four types of pulses in a fiber laser with large net normal dispersion’, Opt. Express, 2011, 19, (8), pp. 7616–7624 (doi: 10.1364/OE.19.007616).
-
4)
-
4. Wu, X., Tang, D.Y., Zhang, H., Zhao, L.M.: ‘Dissipative soliton resonance in an all normal dispersion erbium doped fiber laser’, Opt. Express, 2009, 17, (7), pp. 5580–5584 (doi: 10.1364/OE.17.005580).
-
5)
-
9. Han, D.D., Liu, X.M., Cui, Y.D., Wang, G.X., Zeng, C., Yun, L.: ‘Simultaneous picoseconds and femtosecond solitons delivered from a nanotube mode-locked all fiber laser’, Opt. Lett., 2014, 39, (6), pp. 1565–1568 (doi: 10.1364/OL.39.001565).
-
6)
-
5. Yang, J., Guo, C., Ruan, S., Ouyang, D., Lin, H., Wu, Y., Wen, R.: ‘Observation of dissipative soliton resonance in a net normal dispersion figure of eight fiber laser’, IEEE Photonics J., 2013, 5, (3), p. 1500806 (doi: 10.1109/JPHOT.2013.2265982).
-
7)
-
3. Wang, S.-K., Ning, Q.-Y., Luo, A.-I., Lin, Z.-B., Luo, Z.-C., Xu, W.-C.: ‘Dissipative soliton resonance in a passively mode-locked figure eight fiber laser’, Opt. Express, 2013, 21, (2), pp. 2402–2407 (doi: 10.1364/OE.21.002402).
-
8)
-
14. Sotor, J., Sobon, G., Krzempek, K., Abramski, K.M.: ‘Fundamental and harmonic mode locking in erbium doped fiber laser based on graphene saturable absorber’, Opt. Commun., 2012, 285, (13), pp. 3174–3178 (doi: 10.1016/j.optcom.2012.03.002).
-
9)
-
13. Chang, W., Soto-Crespo, J.M., Ankiewicz, A., Akhmediev, N.: ‘Dissipative soliton resonances in the anomalous dispersion regime’, Phys. Rev. A, 2009, 79, (3), p. 033840 (doi: 10.1103/PhysRevA.79.033840).
-
10)
-
15. Zhang, Z.X., Zhan, L., Yang, X.X., Luo, S.Y., Xia, Y.X.: ‘Passive harmonically mode-locked erbium doped fiber laser with scalable repetition rate up to 1.2 GHz’, Laser Phys. Lett., 2007, 4, (8), pp. 592–596 (doi: 10.1002/lapl.200710017).
-
11)
-
6. Zhang, X., Gu, C., Chen, G., et al: ‘Square wave pulse with ultra wide tuning range in a passively mode-locked fiber laser’, Opt. Lett., 2012, 37, (8), pp. 1334–1336 (doi: 10.1364/OL.37.001334).
-
12)
-
2. Duan, L., Liu, X., Mao, D., Wang, L., Wang, G.: ‘Experimental observation of dissipative soliton resonance in an anomalous dispersion fiber laser’, Opt. Express, 2012, 20, (1), pp. 265–270 (doi: 10.1364/OE.20.000265).
-
13)
-
16. Liu, X.: ‘Mechanism of high energy pulse generation without wave breaking in mode-locked fiber lasers’, Phys. Rev. A, 2010, 82, (5), p. 053808 (doi: 10.1103/PhysRevA.82.053808).
-
14)
-
8. Mao, D., Liu, X., Han, D., Lu, H.: ‘Compact all fiber laser delivering conventional and dissipative solitons’, Opt. Lett., 2013, 38, (16), pp. 3190–3193 (doi: 10.1364/OL.38.003190).
-
15)
-
11. Cui, Y., Liu, X.: ‘Graphene and nanotube mode-locked fiber laser emitting dissipative and conventional solitons’, Opt. Express, 2013, 21, (16), pp. 18969–18974 (doi: 10.1364/OE.21.018969).
-
16)
-
14. Sotor, J., Sobon, G., Krzempek, K., Abramski, K.M.: ‘Fundamental and harmonic mode locking in erbium doped fiber laser based on graphene saturable absorber’, Opt. Commun., 2012, 285, (13), pp. 3174–3178 (doi: 10.1016/j.optcom.2012.03.002).
-
17)
-
4. Wu, X., Tang, D.Y., Zhang, H., Zhao, L.M.: ‘Dissipative soliton resonance in an all normal dispersion erbium doped fiber laser’, Opt. Express, 2009, 17, (7), pp. 5580–5584 (doi: 10.1364/OE.17.005580).
-
18)
-
13. Chang, W., Soto-Crespo, J.M., Ankiewicz, A., Akhmediev, N.: ‘Dissipative soliton resonances in the anomalous dispersion regime’, Phys. Rev. A, 2009, 79, (3), p. 033840 (doi: 10.1103/PhysRevA.79.033840).
-
19)
-
5. Yang, J., Guo, C., Ruan, S., Ouyang, D., Lin, H., Wu, Y., Wen, R.: ‘Observation of dissipative soliton resonance in a net normal dispersion figure of eight fiber laser’, IEEE Photonics J., 2013, 5, (3), p. 1500806 (doi: 10.1109/JPHOT.2013.2265982).
-
20)
-
9. Han, D.D., Liu, X.M., Cui, Y.D., Wang, G.X., Zeng, C., Yun, L.: ‘Simultaneous picoseconds and femtosecond solitons delivered from a nanotube mode-locked all fiber laser’, Opt. Lett., 2014, 39, (6), pp. 1565–1568 (doi: 10.1364/OL.39.001565).
-
21)
-
7. Wang, L., Liu, X., Gong, Y., Mao, D., Duan, L.: ‘Observation of four types of pulses in a fiber laser with large net normal dispersion’, Opt. Express, 2011, 19, (8), pp. 7616–7624 (doi: 10.1364/OE.19.007616).
-
22)
-
10. Liu, X., Han, D., Sun, Z., et al: ‘Versatile multi-wavelength ultrafast fiber laser mode-locked by carbon nanotubes’, Sci. Rep., 2013, 3, p. 2718.
-
23)
-
2. Duan, L., Liu, X., Mao, D., Wang, L., Wang, G.: ‘Experimental observation of dissipative soliton resonance in an anomalous dispersion fiber laser’, Opt. Express, 2012, 20, (1), pp. 265–270 (doi: 10.1364/OE.20.000265).
-
24)
-
15. Zhang, Z.X., Zhan, L., Yang, X.X., Luo, S.Y., Xia, Y.X.: ‘Passive harmonically mode-locked erbium doped fiber laser with scalable repetition rate up to 1.2 GHz’, Laser Phys. Lett., 2007, 4, (8), pp. 592–596 (doi: 10.1002/lapl.200710017).
-
25)
-
8. Mao, D., Liu, X., Han, D., Lu, H.: ‘Compact all fiber laser delivering conventional and dissipative solitons’, Opt. Lett., 2013, 38, (16), pp. 3190–3193 (doi: 10.1364/OL.38.003190).
-
26)
-
11. Cui, Y., Liu, X.: ‘Graphene and nanotube mode-locked fiber laser emitting dissipative and conventional solitons’, Opt. Express, 2013, 21, (16), pp. 18969–18974 (doi: 10.1364/OE.21.018969).
-
27)
-
6. Zhang, X., Gu, C., Chen, G., et al: ‘Square wave pulse with ultra wide tuning range in a passively mode-locked fiber laser’, Opt. Lett., 2012, 37, (8), pp. 1334–1336 (doi: 10.1364/OL.37.001334).
-
28)
-
3. Wang, S.-K., Ning, Q.-Y., Luo, A.-I., Lin, Z.-B., Luo, Z.-C., Xu, W.-C.: ‘Dissipative soliton resonance in a passively mode-locked figure eight fiber laser’, Opt. Express, 2013, 21, (2), pp. 2402–2407 (doi: 10.1364/OE.21.002402).
-
29)
-
12. Chang, W., Ankiewwicz, A., Soto-Crespo, J.M., Akhmediev, N.: ‘Dissipative soliton resonances’, Phys. Rev. A, 2008, 78, (2), p. 023830 (doi: 10.1103/PhysRevA.78.023830).
-
30)
-
X. Liu
.
Mechanism of high-energy pulse generation without wave breaking in mode-locked fiber lasers.
Phys. Rev. A
,
5
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31)
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1. Matsas, V.J., Newson, T.P., Zervas, M.N.: ‘Self starting passively mode-locked fiber ring laser exploiting nonlinear polarization switching’, Opt. Commun., 1992, 92, (1–3), pp. 61–66 (doi: 10.1016/0030-4018(92)90219-H).
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