Abstract
This paper demonstrated the nanosecond pulse laser operation at 1.55 and 2 μm wavelength regions using a newly develop chromium-doped fiber (CrDF) as a saturable absorber (SA) to convert efficiently continuous-wave laser operation to nanosecond pulse laser operation. The laser uses an erbium-doped fiber (EDF) and thulium-doped fiber as the gain medium. A piece of 10 cm long CrDF was integrated into both laser cavities to generate nanosecond pulse laser operation. In 1.55 region generation, an additional single-mode fiber (SMF) 100 m long was added into the EDF laser cavity. Stable pulse generation occurred at a repetition rate of 1 MHz with a pulse width of 432 ns and a signal-to-noise ratio (SNR) of 66 dB. The highest peak power of 24 mW was obtained at 142 mW pump power. In 2 μm region generation, the obtained repetition rate was 10 MHz with a pulse width and SNR of 59 ns and 41 dB, respectively. The highest peak power was only 8.3 mW. By looking into the findings, the newly developed CrDF SA has a potential to be further enhanced toward better generation of ultrashort pulse fiber lasers.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Mohd Afiq Ismail, Sulaiman Wadi Harun, Nurul Rozullyah Zulkepely, Roslan Md Nor, Fauzan Ahmad, and Harith Ahmad
Appl. Opt. 51(36) 8621-8624 (2012)
Sinan Abdulhameed Sadeq, Sulaiman Wadi Harun, and Abdul Hadi Al-Janabi
Appl. Opt. 57(18) 5180-5185 (2018)
F. S. M. Samsamnun, N. F. Zulkipli, M. I. M. A. Khudus, A. S. A. Bakar, W. H. A. Majid, and S. W. Harun
OSA Continuum 2(1) 134-141 (2019)