No abstract

No abstract

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 respectively. 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.

This paper reported a successful demonstration on pulse compression in Q-switched fiber laser by using platinum, Pt as saturable absorber (SA). The Pt-SA is deposited through sputter deposition method. The modulation depth of Pt-SA is 46.5% with a saturation intensity of 1.4 MW cm⁻². The Pt-SA is integrated into the laser cavity to compress the pulse width in Qswitching operation. At the maximum pump power, only a small repetition rate of 29.2 kHz is needed to compress the pulse width to 1.8 μs. Meanwhile, the optical signal-to-noise ratio is about 43.0 dB. The Q-switched pulses have the maximum pulse energy of 6.5 nJ. Based on the findings, Pt has the ability to become an effective SA in generating Q-switched and pulse compression which may lead to further development of pulsed fiber laser.

No abstract