Graphite saturable absorber for Q switched fiber laser

• Main Authors: Yuzaile, Yushazlina R., Awang, Noor Azura, Zakaria, Zahariah, Zalkepali, Noor U.H.H, Latif, Amirah A., Azmi, Atiqah N., Abdul Hadi, Fatin Shaqira
• Format: Article
• Language: English
• Published: Science Publishing Corporation 2018
• Subjects: TJ1125-1345 Machine shops and machine shop practice; TP155-156 Chemical engineering
• Online Access: http://eprints.uthm.edu.my/3681/1/AJ%202018%20%28722%29%20Graphite%20saturable%20absorber%20for%20Q%20switched%20fiber%20laser.pdf; http://eprints.uthm.edu.my/3681/
• Institution: Universiti Tun Hussein Onn Malaysia

This paper reported a successful demonstration on Q-switched fiber laser by using graphite as saturable absorber (SA). The graphite is deposited on the fiber ferrule through a simple mechanical exfoliation method. The modulation depth of the graphite SA is 19.2% with a saturation intensity of 85 MW/cm². The maximum achievable pulse repetition rates and pulse width are 42.41 kHz and 3.40 μs respec-tively. Meanwhile, its optical signal-to-noise ratio is about 50.81 dB. The Q-switched pulses have the maximum pulse energy of 5.84 nJ. These outcomes demonstrated that a stable output of passively Q-switched fiber laser is produced and can be applied for various optical fiber applications.