Mode-locked thulium ytterbium co-doped fiber laser with graphene oxide paper saturable absorber

• Main Authors: Azooz, S.M., Harun, Sulaiman Wadi, Ahmad, Harith, Halder, A., Paul, Mukul Chandra, Pal, M., Bhadra, S.K.
• Format: Article
• Language: English
• Published: 2015
• Subjects: T Technology (General); TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/13863/1/Mode-Locked_Thulium_Ytterbium_Co-Doped_Fiber_Laser.pdf; http://eprints.um.edu.my/13863/; http://iopscience.iop.org/0256-307X/32/1/014204

A mode-locked thulium ytterbium co-doped fiber laser (TYDFL) is proposed and demonstrated by using a commercial graphene oxide (GO) paper as saturable absorber (SA). The GO paper is sandwiched between two fiber ferrules and incorporates a ring laser cavity to generate soliton pulse train operating at 1942.0 nm at a threshold multimode pump power as low as 1.8 W. The mode-locked TYDFL has a repetition rate of 22.32 MHz and the calculated pulse width of 1.1 ns. Even though the SA has a low damage threshold, the easy fabrication of GO paper should promote its potential application in ultrafast photonics.