Tunable passively Q-switched fiber laser of graphite flakes saturable absorber

Abstract

Abstract This study demonstrated the performance of a passively Q-switched fiber laser by using graphite flakes at different EDF absorption which are EDF 1 and EDF 2 at 5.09 dB/m and 7.28 dB/m, respectively. The system is designed as a single ring cavity by employing a graphite flakes saturable absorber (SA) with 23.82% of saturable absorption. The experimental result shows that a wide-band tunable cover from 1544 nm to 1560 nm and 1552 nm to 1570 nm for EDF 1 and EDF 2 respectively. The EDF 2 is the best gain medium due to the conventional wavelength band at C band and L band region.