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Q-switched in-band pumped erbium doped fiber laser operating at L-band region

Z. JUSOH1,2, S. W. HARUN1,3,* , N. S. SHAHABUDDIN1,3, H. AROF1, H. AHMAD2

Affiliation

  1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya 50603 Kuala Lumpur Malaysia
  2. Faculty of Electrical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Malaysia
  3. Photonics Research Centre, University of Malaya 50603 Kuala Lumpur, Malaysia

Abstract

A Q-switched Erbium-doped fiber laser (EDFL) operating in L-band region is demonstrated using an in-band pumping scheme in conjunction with a single-walled carbon nanotubes (SWCNT) based saturable absorber (SA). The performance of the conventional EDFL in a ring cavity without the SA is also investigated for various Erbium-doped fiber (EDF) lengths. It is found that the EDFL lasing wavelength shifts from 1601 nm to 1572 nm as the EDF length is increased from 4 m to 10 m. At EDF length of 4.5 m, the slope efficiency and pump power threshold of the laser are approximately 6.7 % and 42 mW. By incorporating a newly developed SWCNT based SA in the laser cavity, a Q-switched pulse train is successfully generated with a repetition rate of 6.7 kHz and a pulse width of 30.9 μs. The center wavelength of the Q-switched EDFL is 1598nm and it operates with an average output power of 0.3 mW..

Keywords

In-band pumping, Erbium doped fiber, L-band fiber laser, Q-switched fiber laser, Single-walled carbon nanotubes saturable absorber.

Citation

Z. JUSOH, S. W. HARUN, N. S. SHAHABUDDIN, H. AROF, H. AHMAD, Q-switched in-band pumped erbium doped fiber laser operating at L-band region, Optoelectronics and Advanced Materials - Rapid Communications, 8, 5-6, May-June 2014, pp.349-352 (2014).

Submitted at: May 2, 2014

Accepted at: May 15, 2014