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

Abstract

A passively mode-locked, bismuth–erbium-co-doped 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.

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Acknowledgments

This work was supported by the Ministry of Higher Education and University of Malaya under Grant UM.C/625/1/HIR/MOHE/SCI/29 and also Grants PV031/2012A and RU002-2013.

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Correspondence to H. Ahmad.

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Ahmad, H., Zulkifli, A.Z., Muhammad, F.D. et al. Mode-locked L-band bismuth–erbium fiber laser using carbon nanotubes. Appl. Phys. B 115, 407–412 (2014). https://doi.org/10.1007/s00340-013-5616-x

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Keywords

  • Fiber Laser
  • Saturable Absorber
  • Average Output Power
  • Amplify Spontaneous Emission
  • Group Velocity Dispersion