In2Se3 saturable absorber for generating tunable Q-switched outputs from a bismuth-erbium doped fiber laser

H. Ahmad, A. Z. Zulkifli, M. Yasin, M. F. Ismail, K. Thambiratnam

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

An Indium-selenide based saturable absorber is proposed and demonstrated for the passive generation of Q-switched pulses in a C- to L-band fiber laser. The proposed laser uses a 21 cm long bismuth-erbium doped fiber (Bi-EDF) as the linear gain medium, and is capable of generating passively Q-switched outputs that can be tuned over a bandwidth of 40 nm from 1533 nm to 1573 nm. The generated pulses have a maximum repetition rate of 52 kHz and a minimum pulse width of 2.2 μs at the maximum available pump power of 134 mW. Similarly, a maximum pulse energy and average output power of 13.5 nJ and 0.7 mW respectively are obtained at the same pump power. Radio frequency measurement indicates a stable pulse obtained with a high signal-to-noise ratio of 42.8 dB and with no other frequency peaks observed, indicating that only the fundamental mode is present. The proposed tunable Q-switched Bi-EDF laser would have significant potential for applications requiring tunable, high energy pulses such as spectroscopy and medicine in the C- and L-band regions.

Original languageEnglish
Article number115105
JournalLaser Physics Letters
Volume15
Issue number11
DOIs
Publication statusPublished - Nov 2018

Keywords

  • Q-switching
  • bismuth-erbium
  • indium-selenide (InSe)
  • saturable absorber (SA)

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