Performance of Q-Switched Fiber Laser Using Optically Deposited Reduced Graphene Oxide as Saturable Absorber

Graphene is one of the most attractive two-dimensional nanomaterials widely used as saturable absorber for pulsing laser, owing to its unique non-linear optical responses. However, fabrication and integration graphene into a laser cavity involves complex processes procedures. Mass production graphene-based absorbers requires simplification process with minimum material wastage. Reduced oxide, functionalized graphene, found have absorption property well. Comparatively, it easier more cost-effective produce. On other hand, deposition technique that maximizes utilization. In this work, commercially available reduced oxide in N-methyl-2-pyrrolidone was fabricate device via deposition, due simplicity high efficacy. Optical pulse generation Q-switching were successfully demonstrated optically deposited rGO-SA incorporated ring erbium-doped fiber laser. Pulse repetition rate up ~85.0 kHz durations short ~2.0 μs achieved. Its performance Q-switched then compared previous works. rGO has much lower threshold holds huge potential mass maximum