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Passively Q-switched erbium-doped fiber laser at L-band region by employing multi-walled carbon nanotubes as saturable absorber

H. HARIS1, C. L. ANYI2, N. M. ALI2, H. AROF2, F. AHMAD1,2, R. M. NOR3, N. R. ZULKEPELY3, S. W. HARUN1,2,*

Affiliation

  1. Photonics Research Centre, University of Malaya 50603 Kuala Lumpur, Malaysia
  2. Department of Electrical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
  3. Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia

Abstract

An inexpensive and simple passively Q-switched Erbium-doped fiber laser (EDFL) operating in the L-band region with a stable pulse train is generated by employing a multi-walled carbon nanotubes (MWCNTs) polymer composite film based saturable absorber. By incorporating the SA with a 50 m Erbium doped fiber (EDF) in a laser cavity, Q-switched pulse generation in the L-band region is made possible. The repetition rate of the pulse train ranges from 12.3 kHz to 14.4 kHz as the 1480 nm pump power is varied from 89.4 mW to 106.1 mW. At the highest pump power of 106.1 mW, the pulse width and pulse energy of the laser are 10.8 μs and 135.1 nJ, correspondingly. The saturable absorber (SA) is constructed from a tiny piece of MWCNTs thin film sandwiched between two FC/PC fiber connectors. The film is prepared by mixing MWCNTs homogeneous solution with a diluted Polyvinyl alcohol (PVA) polymer solution and left to dry at room temperature..

Keywords

L-band, Multi-walled carbon nanotubes, Q-switched, Erbium doped fiber laser.

Citation

H. HARIS, C. L. ANYI, N. M. ALI, H. AROF, F. AHMAD, R. M. NOR, N. R. ZULKEPELY, S. W. HARUN, Passively Q-switched erbium-doped fiber laser at L-band region by employing multi-walled carbon nanotubes as saturable absorber, Optoelectronics and Advanced Materials - Rapid Communications, 8, 11-12, November-December 2014, pp.1025-1028 (2014).

Submitted at: Aug. 28, 2014

Accepted at: Nov. 13, 2014