4.6 Article

Passively Q-switched Er3+-doped fiber lasers using colloidal PbS quantum dot saturable absorber

Journal

OPTICS EXPRESS
Volume 24, Issue 10, Pages -

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.24.010675

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Funding

  1. Ministry of Science and Technology (MOST) of Taiwan [NSC-101-2218-E-027-003-MY3]
  2. Ministry of Economic Affairs (MOEA) of Taiwan [104-EC-17-A-07-S3-011]

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We report on the demonstration of a passively Q-switched 1.55 mu m fiber laser utilizing a colloidal PbS quantum dot (QD) thin film as a saturable absorber. Colloidal PbS QD films have several features that are advantageous in a passively Q-switched fiber laser operation, including large operation wavelength range, cost-effectiveness, and a low saturable absorption intensity. We conducted thorough material and optical studies to verify the advantages of PbS QDs in Q-switched laser operation and successfully generated 801 nJ pulses with a 24.2 kHz repetition rate. To the best of our knowledge, the developed Q-switched fiber laser is the first based on colloidal PbS QDs. (C) 2016 Optical Society of America

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