  We demonstrate generation of linearly polarized pulses from a passively
Q-switched Erbium-doped fiber laser. The cavity was designed using only
polarization maintaining (PM) fibers and components, resulting in linearly
polarized output beam with degree of polarization (DOP) at the level of 97.6%.
Reduced graphene oxide (rGO) was used as a saturable absorber for Q-switched
operation. The laser was capable of delivering 1.85us pulses with 125nJ pulse
energy at 115kHz repetition rate.
