Poly (N-vinyl Carbazole) – Polypyrrole/graphene oxide nanocomposite material on tapered fiber for Q-switched pulse generation

• Published in: Optics and laser technology 2018-02, Vol.99, p.184-190
• Main Authors: Ahmad, H., Faruki, M.J., Jasim, A.A., Ooi, S.I., Thambiratnam, K.
• Format: Article
• Language: English
• Subjects: Fiber laser; Fiber lasers; Fibers; Graphene; Graphene oxide; Nanocomposites; Optical tapered fiber; Poly (N-vinyl Carbazole) – Polypyrrole; Polyvinyl carbazole; Q switched lasers; Q-switched pulses
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2017.09.001

•A passively Q-switched fiber laser using a PNVC-PPy/GO saturable absorber.•The PNVC-PPy/GO deposited on a 3mm tapered fiber forms the saturable absorber.•Obtained pulses have a repetition rate of 42.7kHz and pulse width of 2.48μs.•Pulses also have a maximum average power of 0.19mW and pulse energy of 4.43nJ.•The proposed laser has a simple design and low fabrication cost. A passively Q-switched fiber laser using a Saturable Absorber (SA) fabricated from a new Poly (N-vinyl Carbazole) – Polypyrrole/Graphene Oxide (PNVC-PPy/GO) nanocomposite material deposited on a tapered fiber is proposed and demonstrated. The PNVC-PPy/GO composition is deposited along a 3mm length of the 6.5cm tapered fiber which has a tapered waist of 8µm. Q-switched pulses are obtained with repetition rates of 25.15–42.7kHz and pulse widths of 5.74–2.48μs over a pump power range of 12.8–40.0mW. A maximum average power of 0.19mW and pulse energy of 4.43nJ are also observed. The proposed Q-switched maintains advantages of a simple design and low fabrication cost while at the same time generating high quality Q-switched pulses.