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Nonlinear output response of acousto-optic modulated distributed Bragg reflector (DBR) fiber laser

MAN-HONG LAI1, MD RAJIBUL ISLAM1,* , KOK-SING LIM1,2, SHIRLEY DIONG-CHEA FANG2, HANG-ZHOU YANG3, XUEGUANG QIAO3, HARITH AHMAD1,2

Affiliation

  1. Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia
  2. Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
  3. College of Physics, Northwest University, Xi’an, Shaanxi 710069, China

Abstract

This article presents a study on the output response of a distributed Bragg reflector (DBR) to acousto-optic wave. In the fabrication, the DBR is constructed with a 12 cm long EDF and two FBGs that share the same center wavelength. The behavior of the DBR under the influence of acousto-optic wave can be well explained based on the model of a single sinusoidal-modulated FBG. A nonlinear response has been observed for DBR output amplitude which is similar to the reflectivity variation at the center wavelength of an FBG impinged by acousto-optic wave. The potential for using DBR as a vibration sensor has been investigated in the frequency range of 120 kHz-190 kHz..

Keywords

Distributed Bragg reflector (DBR), Acousto-optic wave, FBG, Vibration sensing.

Citation

MAN-HONG LAI, MD RAJIBUL ISLAM, KOK-SING LIM, SHIRLEY DIONG-CHEA FANG, HANG-ZHOU YANG, XUEGUANG QIAO, HARITH AHMAD, Nonlinear output response of acousto-optic modulated distributed Bragg reflector (DBR) fiber laser, Optoelectronics and Advanced Materials - Rapid Communications, 10, 9-10, September-October 2016, pp.611-615 (2016).

Submitted at: Dec. 20, 2014

Accepted at: Sept. 29, 2016