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Passively Q-switched erbium-doped fiber laser using quantum dots CdSe embedded in polymer film as saturable absorber

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Abstract

We demonstrate a passively Q-switched erbium doped fiber laser (EDFL) based on quantum dots (QD) CdSe as a saturable absorber (SA). The synthesized CdSe powder was embedded into a poly(methyl methacrylate) (PMMA) using emulsion polymerization process. The film is sandwiched between two fiber connector via an adapter to form a fiber-compatible SA device. By integrating the SA device into the EDFL ring cavity, the stable Q-switched operation is achieved at 1559.35 nm as the pump power is varied within 30–118 mW. The laser has a pump threshold of 20.4 mW. The pulse repetition rate shows an increasing trend from 33.2 to 68.45 kHz, whereas the pulse width exhibits a decreasing trend from 10.04 to 4.30 μs as the pump power is increased from 30 to 118 mW. The highest pulse energy of 11.83 nJ is obtained at a pump power of 118 mW. These results indicate that QD CdSe is a promising SA for Q-switching laser operation.

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Authors and Affiliations

  1. Department of Electrical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    E. I. Ismail, N. A. A. Kadir, H. Arof & S. W. Harun

  2. Centre of Telecommunication Research and Innovation, Universiti Teknikal Malaysia Melaka, 76100, Hang Tuah Jaya, Melaka, Malaysia

    A. A. Latiff

  3. Department of Physics, Faculty of Science and Technology, Airlangga University, Surabaya, Indonesia

    S. W. Harun

Authors
  1. E. I. Ismail
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  2. N. A. A. Kadir
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  3. A. A. Latiff
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  4. H. Arof
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  5. S. W. Harun
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Correspondence to S. W. Harun.

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Ismail, E.I., Kadir, N.A.A., Latiff, A.A. et al. Passively Q-switched erbium-doped fiber laser using quantum dots CdSe embedded in polymer film as saturable absorber. Opt Quant Electron 51, 182 (2019). https://doi.org/10.1007/s11082-019-1897-6

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