| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Q-Switched Erbium-Doped Fiber Laser with a Carbon Nanotube Based Saturable Absorber |
| S. W. Harun1,2**, M. A. Ismail1, F. Ahmad1, M. F. Ismail1, R. M. Nor3, N. R. Zulkepely3, H. Ahmad2 |
1Department of Electrical Engineering, University of Malaya 50603 Kuala Lumpur, Malaysia
2Photonics Research Center, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia
3Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia
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| Cite this article: |
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S. W. Harun, M. A. Ismail, F. Ahmad et al 2012 Chin. Phys. Lett. 29 114202 |
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Abstract We demonstrate a simple, compact and low cost Q-switched erbium-doped fiber laser (EDFL) using single-wall carbon nanotubes (CNTs) as a saturable absorber for possible applications in metrology, sensing, and medical diagnostics. The EDFL operates at around 1560 nm with repetition rates of 16.1 kHz and 6.4 kHz with saturable absorbers SA1 and SA2 at a pump power of 120 mW. The absorbers are constructed by optically driven deposition and normal deposition techniques. It is observed that the optical deposition method produces a Q-switched EDFL with a lower threshold of 70 mW and better Q-switching performance compared to that of the normal deposition method. The EDFL also has pulse energy of 90.3 nJ and pulse width of 11.6 μs at 120 mW pump power.
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Received: 13 June 2012
Published: 28 November 2012
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| PACS: |
42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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