Mode-locked L-band bismuth–erbium fiber laser using carbon nanotubes

• Main Authors: Ahmad, Harith, Zulkifli, Ahmad Zarif, Muhammad, Farah Diana, Zulkifli, Mohd Zamani, Thambiratnam, Kavintheran
• Format: Article
• Language: English
• Published: Springer 2014
• Subjects: QC Physics
• Online Access: http://irep.iium.edu.my/84297/7/84297_Mode-locked%20L-band%20bismuth%E2%80%93erbium%20fiber%20laser%20using%20carbon%20nanotubes.pdf; http://irep.iium.edu.my/84297/; https://link.springer.com/article/10.1007/s00340-013-5616-x

A passively mode-locked, bismuth–erbium-codoped fiber (Bi-EDF) with a pulse width of 460 fs is proposed and demonstrated. A highly doped, 180-cm Bi-EDF with an erbium concentration of 3,250 ppm/wt and an absorption rate of 133 dB/m at 1,530 nm serves as the gain medium. The cavity is 11.6 m long with an overall group velocity dispersion of ?0.063 ps2 . The output pulses have a repetition rate, average output power, pulse energy and peak power of 11.18 MHz, 5 mW, 448 pJ and 1 kW, respectively. The system has a high beam quality and a narrow pulse width output in the L-band region.