Generation of Q-switched thulium-doped fiber laser (TDFL) using differentsaturable absorbers

• Main Authors: Sharif, N.M., Yusoff, N.M., Mohd. Izhar, M.A., Ahmad, F., Harun, Sulaiman Wadi, Ahmad, Harith
• Format: Article
• Published: Penerbit UTM Press 2016
• Subjects: QC Physics; TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.um.edu.my/17958/; http://dx.doi.org/10.11113/jt.v78.8810

A Q-switched Thulium-doped Fiber Laser (TDFL) operating at approximately 2 µm wavelength is successfully generated by using four different saturable absorbers (SAs) which are nitrogen-doped graphene in PVA (NG:PVA), nitrogen-doped graphene in PEO (NG:PEO), single-walled carbon nanotube in PVA (SWCNT:PVA), and high pressure carbon monoxide carbon nanotube in PVA (CNTHiPCO:PVA). The SAs integrated in the cavity were able to provide the real saturable absorption in modulating the intra-cavity losses. SWCNT gives the best results with the highest repetition rate and lowest pulse width of 57.45 kHz and 1.958 nJ correspondingly as compared to the other three SAs.