Date of Award

9-1-2016

Thesis Type

masters

Document Type

Thesis

Divisions

inst1

Department

Institute of Graduate Studies

Institution

University of Malaya

Abstract

There has been intense work on the pulse operation in the conventional (C-) band, long wavelength (L-) band as well as in the 2 μm region. Nevertheless, as increasing demands for bandwidth have now pushed the envelope into the short-wavelength (S-band) region, it is of interest to further expand this coverage into the S-band region. In this research, depressed-cladding erbium doped fiber (DC-EDF) are chosen to accomplish S-band fiber laser because of their ability to provide and maintain high level of inversion along the fiber. It is designed with different index profile and this is called W-shape index profile. The system uses a 15 m long DC- EDF as a gain medium which is spooled with a diameter of about 9cm so as to inhibit operation at wavelengths of more than 1530 nm, while a thin CNT film is sandwiched between two connectors to function as the SA for the generation of the desired Q-switched pulses. To investigate the tunable Q-Switched fiber laser operating in the S-band region, a tunable Fabry-Perot etalon filter is inserted in the setup as the wavelength tuning and filtering mechanism. The tuning range of the laser output carrying the Q-switching pulses covers a wide wavelength range of 47 nm, which spans from 1479 nm to 1526 nm. In this research, we investigate and demonstrate the pulse operation in DC-EDF. To the best of our knowledge, this is the first demonstration of characterization pulse operation in S band region using DC-EDF.

Note

Dissertation (M.A) - Institute of Graduate Studies, University of Malaya, 2016.

Download

Share

COinS