Low threshold linear cavity mode-locked fiber laser using microfiber-based carbon nanotube saturable absorber. (June 2018)

• Record Type: Journal Article
• Authors: Lau, K.Y.; Ng, E.K.; Abu Bakar, M.H.; Abas, A.F.; Alresheedi, M.T.; Yusoff, Z.; Mahdi, M.A.
• Is Part Of: Optics & laser technology. Volume 102(2018)
• Page Start: 240
• Page End: 246
• Publication Date: 2018-06
• Subjects: Ultrashort pulse -- Pulse fiber laser -- Carbon nanotube; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2017.12.043
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: The lowest threshold of mode-locking for linear cavity mode-locked fiber laser. The saturable absorber has low saturation fluence of 0.98 μm/cm 2 . Unimpaired saturable absorber performance even though light propagate bidirectionally. First report on linear cavity laser using microfiber-based carbon nanotube saturable absorber. Abstract: In this work, we demonstrate a linear cavity mode-locked erbium-doped fiber laser in C-band wavelength region. The passive mode-locking is achieved using a microfiber-based carbon nanotube saturable absorber. The carbon nanotube saturable absorber has low saturation fluence of 0.98 µJ/cm 2 . Together with the linear cavity architecture, the fiber laser starts to produce soliton pulses at low pump power of 22.6 mW. The proposed fiber laser generates fundamental soliton pulses with a center wavelength, pulse width, and repetition rate of 1557.1 nm, 820 fs, and 5.41 MHz, respectively. This mode-locked laser scheme presents a viable option in the development of low threshold ultrashort pulse system for deployment as a seed laser.