A passively Q-switched S-band fiber laser using Molybdenum Diselenide (MoSe2) saturable absorber (SA)
is proposed and demonstrated. The SA is fabricated by depositing MoSe2 onto two fiber ferrules using the
drop-cast method before heating and connecting the two fiber ferrules to form the SA. The passively
Q-switched fiber laser designed using the MoSe2 SA has an operational range of 1491.0–1502.0 nm. The
output pulse train has a pulse-width ranging from 2.0 μs to 1.0 μs and corresponding repetition rate of
between 34.5 kHz and 90 kHz with increasing pump powers, as well as a signal-to-noise of about
35.97 dB. The peak performance of the proposed laser is between 1480.0 and 1490.0 nm, corresponding
to the first peak gain region with the S-band
