Chin. Phys. Lett.  2017, Vol. 34 Issue (1): 014202    DOI: 10.1088/0256-307X/34/1/014202
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Transition Metal Dichalcogenides (WS$_{2}$ and MoS$_{2}$) Saturable Absorbers for Mode-Locked Erbium-Doped Fiber Lasers
N. A. A. Kadir1, E. I. Ismail1, A. A. Latiff2, H. Ahmad2, H. Arof1, S. W. Harun1,2**
1Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
2Photonics Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia
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N. A. A. Kadir, E. I. Ismail, A. A. Latiff et al  2017 Chin. Phys. Lett. 34 014202
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Abstract We demonstrate an ultrafast fiber laser based on transition metal dichalcogenide materials which are tungsten disulfide (WS$_{2}$) and molybdenum disulfide (MoS$_{2}$) as saturable absorber (SA). These materials are fabricated via a simple drop-casting method. By employing WS$_{2}$, we obtain a stable harmonic mode-locking at the threshold pump power of 184 mW, and the generated soliton pulse has 3.48 MHz of repetition rate. At the maximum pump power of 250 mW, we also obtain a small value of pulse duration, 2.43 ps with signal-to-noise ratio (SNR) of 57 dB. For MoS$_{2}$ SA, the pulse is generated at 105 mW pump power with repetition rate of 1.16 MHz. However, the pulse duration cannot be detected by the autocorrelator device as the pulse duration recorded is 468 ns, with the SNR value of 35 dB.
Received: 06 October 2016      Published: 29 December 2016
PACS:  42.55.Wd (Fiber lasers)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
  42.60.Fc (Modulation, tuning, and mode locking)  
  42.70.-a (Optical materials)  
Fund: Supported by the University of Malaya under Grant No PG173-2015B.
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https://cpl.iphy.ac.cn/10.1088/0256-307X/34/1/014202       OR      https://cpl.iphy.ac.cn/Y2017/V34/I1/014202
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N. A. A. Kadir
E. I. Ismail
A. A. Latiff
H. Ahmad
H. Arof
S. W. Harun
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