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Q-switched Erbium-doped fiber laser using multi-layer graphene oxide based saturable absorber

Z. S. SALEH1, C. L. ANYI1, H. HARIS2, F. AHMAD1,2, N. M. ALI1, S. W. HARUN1,2, H. AROF1,*

Affiliation

  1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya 50603 Kuala Lumpur Malaysia
  2. Photonic Research Centre, University of Malaya 50603 Kuala Lumpur, Malaysia

Abstract

A stable passive Q-switched Erbium doped fiber laser (EDFL) operating at 1533 nm is demonstrated using a multi-layer graphene oxide (GO) based saturable absorber. The GO was synthesized via chemical oxidation of graphite flakes at room temperature using a simplified Hummer's method. By dipping a fiber ferrule end face onto the GO suspension, GO is successfully coated onto the end face, making it a simple saturable absorption device. At 980 nm pump power of 40 mW, the EDFL generates an optical pulse train with a repetition rate of 12.98 kHz and pulse width of 13 μs. The highest energy of 0.46 μJ is achieved at the maximum pump power of 90 mW. The pulse width ranges from 5.14 to 14.63 μs..

Keywords

Erbium doped fiber laser, Q-switching, Graphene oxide saturable absorber.

Citation

Z. S. SALEH, C. L. ANYI, H. HARIS, F. AHMAD, N. M. ALI, S. W. HARUN, H. AROF, Q-switched Erbium-doped fiber laser using multi-layer graphene oxide based saturable absorber, Optoelectronics and Advanced Materials - Rapid Communications, 8, 7-8, July-August 2014, pp.626-630 (2014).

Submitted at: June 8, 2014

Accepted at: July 10, 2014