70 nm, broadly tunable passively Q-switched thulium-doped fiber laser with few-layer Mo0. 8W0. 2S2 saturable absorber

Published 2018

Harith Ahmad University of Malaya

Muhamad Zharif Samion Photonics Research Centre, University of Malaya

Anir Syazwan Sharbirin PhD, Photonics Research Centre, University of Malaya

Mohammad Faizal Ismail (Ismail, M.F.) Photonics Research Centre, University of Malaya

DOI: 10.1016/j.yofte.2018.10.018

Abstract:

In this work, a thin Mo 0.8 W 0.2 S 2 film is proposed and fabricated for the use as a saturable absorber (SA) in a thulium-doped fiber laser (TDFL) cavity. The few-layer Mo 0.8 W 0.2 S 2 nanoparticles are obtained through hydrothermal exfoliation as a thin film and suspended in a polymer host, which is then placed between two fiber ferrules to serve as an SA. The proposed laser is capable of generating outputs with a maximum repetition rate of 65.79 kHz and a minimum pulse width of 1.84 µs at the maximum pump power of 168.92...

Excerpt:

...this pulse signal now travels along the laser cavity until it reaches a 2.0 ?m TBPF, which provides an advantage of tuning the output wavelength. The TBPF used is manufactured by Agiltron and has an insertion loss of 1.0 to 4.0 dB that varies in accordance to the wavelength...